merge: 正确合并 main 分支改动

合并 origin/main 最新改动，正确保留所有配置：
- Ops 运维监控配置和功能
- LinuxDo Connect OAuth 配置
- Update 在线更新配置
- 优惠码功能
- 其他 main 分支新功能

修复之前合并时错误删除 LinuxDo 和 Update 配置的问题。

.gitignore

@@ -14,6 +14,9 @@ backend/server
 backend/sub2api
 backend/main
 
+# Go 测试二进制
+*.test
+
 # 测试覆盖率
 *.out
 coverage.html

backend/cmd/jwtgen/main.go

@@ -33,7 +33,7 @@ func main() {
 	}()
 
 	userRepo := repository.NewUserRepository(client, sqlDB)
-	authService := service.NewAuthService(userRepo, cfg, nil, nil, nil, nil)
+	authService := service.NewAuthService(userRepo, cfg, nil, nil, nil, nil, nil)
 
 	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
 	defer cancel()

backend/cmd/server/wire_gen.go

@@ -51,13 +51,17 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	turnstileVerifier := repository.NewTurnstileVerifier()
 	turnstileService := service.NewTurnstileService(settingService, turnstileVerifier)
 	emailQueueService := service.ProvideEmailQueueService(emailService)
-	authService := service.NewAuthService(userRepository, configConfig, settingService, emailService, turnstileService, emailQueueService)
+	promoCodeRepository := repository.NewPromoCodeRepository(client)
+	billingCache := repository.NewBillingCache(redisClient)
+	userSubscriptionRepository := repository.NewUserSubscriptionRepository(client)
+	billingCacheService := service.NewBillingCacheService(billingCache, userRepository, userSubscriptionRepository, configConfig)
+	promoService := service.NewPromoService(promoCodeRepository, userRepository, billingCacheService, client)
+	authService := service.NewAuthService(userRepository, configConfig, settingService, emailService, turnstileService, emailQueueService, promoService)
 	userService := service.NewUserService(userRepository)
-	authHandler := handler.NewAuthHandler(configConfig, authService, userService, settingService)
+	authHandler := handler.NewAuthHandler(configConfig, authService, userService, settingService, promoService)
 	userHandler := handler.NewUserHandler(userService)
 	apiKeyRepository := repository.NewAPIKeyRepository(client)
 	groupRepository := repository.NewGroupRepository(client, db)
-	userSubscriptionRepository := repository.NewUserSubscriptionRepository(client)
 	apiKeyCache := repository.NewAPIKeyCache(redisClient)
 	apiKeyService := service.NewAPIKeyService(apiKeyRepository, userRepository, groupRepository, userSubscriptionRepository, apiKeyCache, configConfig)
 	apiKeyHandler := handler.NewAPIKeyHandler(apiKeyService)
@@ -65,8 +69,6 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	usageService := service.NewUsageService(usageLogRepository, userRepository, client)
 	usageHandler := handler.NewUsageHandler(usageService, apiKeyService)
 	redeemCodeRepository := repository.NewRedeemCodeRepository(client)
-	billingCache := repository.NewBillingCache(redisClient)
-	billingCacheService := service.NewBillingCacheService(billingCache, userRepository, userSubscriptionRepository, configConfig)
 	subscriptionService := service.NewSubscriptionService(groupRepository, userSubscriptionRepository, billingCacheService)
 	redeemCache := repository.NewRedeemCache(redisClient)
 	redeemService := service.NewRedeemService(redeemCodeRepository, userRepository, subscriptionService, redeemCache, billingCacheService, client)
@@ -112,6 +114,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	antigravityOAuthHandler := admin.NewAntigravityOAuthHandler(antigravityOAuthService)
 	proxyHandler := admin.NewProxyHandler(adminService)
 	adminRedeemHandler := admin.NewRedeemHandler(adminService)
+	promoHandler := admin.NewPromoHandler(promoService)
 	settingHandler := admin.NewSettingHandler(settingService, emailService, turnstileService)
 	opsRepository := repository.NewOpsRepository(db)
 	pricingRemoteClient := repository.ProvidePricingRemoteClient(configConfig)
@@ -140,7 +143,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	userAttributeValueRepository := repository.NewUserAttributeValueRepository(client)
 	userAttributeService := service.NewUserAttributeService(userAttributeDefinitionRepository, userAttributeValueRepository)
 	userAttributeHandler := admin.NewUserAttributeHandler(userAttributeService)
-	adminHandlers := handler.ProvideAdminHandlers(dashboardHandler, adminUserHandler, groupHandler, accountHandler, oAuthHandler, openAIOAuthHandler, geminiOAuthHandler, antigravityOAuthHandler, proxyHandler, adminRedeemHandler, settingHandler, opsHandler, systemHandler, adminSubscriptionHandler, adminUsageHandler, userAttributeHandler)
+	adminHandlers := handler.ProvideAdminHandlers(dashboardHandler, adminUserHandler, groupHandler, accountHandler, oAuthHandler, openAIOAuthHandler, geminiOAuthHandler, antigravityOAuthHandler, proxyHandler, adminRedeemHandler, promoHandler, settingHandler, opsHandler, systemHandler, adminSubscriptionHandler, adminUsageHandler, userAttributeHandler)
 	gatewayHandler := handler.NewGatewayHandler(gatewayService, geminiMessagesCompatService, antigravityGatewayService, userService, concurrencyService, billingCacheService, configConfig)
 	openAIGatewayHandler := handler.NewOpenAIGatewayHandler(openAIGatewayService, concurrencyService, billingCacheService, configConfig)
 	handlerSettingHandler := handler.ProvideSettingHandler(settingService, buildInfo)
@@ -148,7 +151,7 @@ func initializeApplication(buildInfo handler.BuildInfo) (*Application, error) {
 	jwtAuthMiddleware := middleware.NewJWTAuthMiddleware(authService, userService)
 	adminAuthMiddleware := middleware.NewAdminAuthMiddleware(authService, userService, settingService)
 	apiKeyAuthMiddleware := middleware.NewAPIKeyAuthMiddleware(apiKeyService, subscriptionService, configConfig)
-	engine := server.ProvideRouter(configConfig, handlers, jwtAuthMiddleware, adminAuthMiddleware, apiKeyAuthMiddleware, apiKeyService, subscriptionService, opsService)
+	engine := server.ProvideRouter(configConfig, handlers, jwtAuthMiddleware, adminAuthMiddleware, apiKeyAuthMiddleware, apiKeyService, subscriptionService, opsService, settingService, redisClient)
 	httpServer := server.ProvideHTTPServer(configConfig, engine)
 	opsMetricsCollector := service.ProvideOpsMetricsCollector(opsRepository, settingRepository, db, redisClient, configConfig)
 	opsAggregationService := service.ProvideOpsAggregationService(opsRepository, settingRepository, db, redisClient, configConfig)

backend/ent/account_query.go

@@ -9,6 +9,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -31,6 +32,7 @@ type AccountQuery struct {
 	withProxy         *ProxyQuery
 	withUsageLogs     *UsageLogQuery
 	withAccountGroups *AccountGroupQuery
+	modifiers         []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -495,6 +497,9 @@ func (_q *AccountQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Acco
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -690,6 +695,9 @@ func (_q *AccountQuery) loadAccountGroups(ctx context.Context, query *AccountGro
 
 func (_q *AccountQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -755,6 +763,9 @@ func (_q *AccountQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -772,6 +783,32 @@ func (_q *AccountQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *AccountQuery) ForUpdate(opts ...sql.LockOption) *AccountQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *AccountQuery) ForShare(opts ...sql.LockOption) *AccountQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // AccountGroupBy is the group-by builder for Account entities.
 type AccountGroupBy struct {
 	selector

backend/ent/accountgroup_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"github.com/Wei-Shaw/sub2api/ent/account"
@@ -25,6 +26,7 @@ type AccountGroupQuery struct {
 	predicates  []predicate.AccountGroup
 	withAccount *AccountQuery
 	withGroup   *GroupQuery
+	modifiers   []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -347,6 +349,9 @@ func (_q *AccountGroupQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -432,6 +437,9 @@ func (_q *AccountGroupQuery) loadGroup(ctx context.Context, query *GroupQuery, n
 
 func (_q *AccountGroupQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Unique = false
 	_spec.Node.Columns = nil
 	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
@@ -495,6 +503,9 @@ func (_q *AccountGroupQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -512,6 +523,32 @@ func (_q *AccountGroupQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *AccountGroupQuery) ForUpdate(opts ...sql.LockOption) *AccountGroupQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *AccountGroupQuery) ForShare(opts ...sql.LockOption) *AccountGroupQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // AccountGroupGroupBy is the group-by builder for AccountGroup entities.
 type AccountGroupGroupBy struct {
 	selector

backend/ent/apikey_query.go

@@ -9,6 +9,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -29,6 +30,7 @@ type APIKeyQuery struct {
 	withUser      *UserQuery
 	withGroup     *GroupQuery
 	withUsageLogs *UsageLogQuery
+	modifiers     []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -458,6 +460,9 @@ func (_q *APIKeyQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*APIKe
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -583,6 +588,9 @@ func (_q *APIKeyQuery) loadUsageLogs(ctx context.Context, query *UsageLogQuery,
 
 func (_q *APIKeyQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -651,6 +659,9 @@ func (_q *APIKeyQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -668,6 +679,32 @@ func (_q *APIKeyQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *APIKeyQuery) ForUpdate(opts ...sql.LockOption) *APIKeyQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *APIKeyQuery) ForShare(opts ...sql.LockOption) *APIKeyQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // APIKeyGroupBy is the group-by builder for APIKey entities.
 type APIKeyGroupBy struct {
 	selector

backend/ent/client.go

@@ -19,6 +19,8 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/accountgroup"
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/proxy"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/setting"
@@ -45,6 +47,10 @@ type Client struct {
 	AccountGroup *AccountGroupClient
 	// Group is the client for interacting with the Group builders.
 	Group *GroupClient
+	// PromoCode is the client for interacting with the PromoCode builders.
+	PromoCode *PromoCodeClient
+	// PromoCodeUsage is the client for interacting with the PromoCodeUsage builders.
+	PromoCodeUsage *PromoCodeUsageClient
 	// Proxy is the client for interacting with the Proxy builders.
 	Proxy *ProxyClient
 	// RedeemCode is the client for interacting with the RedeemCode builders.
@@ -78,6 +84,8 @@ func (c *Client) init() {
 	c.Account = NewAccountClient(c.config)
 	c.AccountGroup = NewAccountGroupClient(c.config)
 	c.Group = NewGroupClient(c.config)
+	c.PromoCode = NewPromoCodeClient(c.config)
+	c.PromoCodeUsage = NewPromoCodeUsageClient(c.config)
 	c.Proxy = NewProxyClient(c.config)
 	c.RedeemCode = NewRedeemCodeClient(c.config)
 	c.Setting = NewSettingClient(c.config)
@@ -183,6 +191,8 @@ func (c *Client) Tx(ctx context.Context) (*Tx, error) {
 		Account:                 NewAccountClient(cfg),
 		AccountGroup:            NewAccountGroupClient(cfg),
 		Group:                   NewGroupClient(cfg),
+		PromoCode:               NewPromoCodeClient(cfg),
+		PromoCodeUsage:          NewPromoCodeUsageClient(cfg),
 		Proxy:                   NewProxyClient(cfg),
 		RedeemCode:              NewRedeemCodeClient(cfg),
 		Setting:                 NewSettingClient(cfg),
@@ -215,6 +225,8 @@ func (c *Client) BeginTx(ctx context.Context, opts *sql.TxOptions) (*Tx, error)
 		Account:                 NewAccountClient(cfg),
 		AccountGroup:            NewAccountGroupClient(cfg),
 		Group:                   NewGroupClient(cfg),
+		PromoCode:               NewPromoCodeClient(cfg),
+		PromoCodeUsage:          NewPromoCodeUsageClient(cfg),
 		Proxy:                   NewProxyClient(cfg),
 		RedeemCode:              NewRedeemCodeClient(cfg),
 		Setting:                 NewSettingClient(cfg),
@@ -253,9 +265,9 @@ func (c *Client) Close() error {
 // In order to add hooks to a specific client, call: `client.Node.Use(...)`.
 func (c *Client) Use(hooks ...Hook) {
 	for _, n := range []interface{ Use(...Hook) }{
-		c.APIKey, c.Account, c.AccountGroup, c.Group, c.Proxy, c.RedeemCode, c.Setting,
-		c.UsageLog, c.User, c.UserAllowedGroup, c.UserAttributeDefinition,
-		c.UserAttributeValue, c.UserSubscription,
+		c.APIKey, c.Account, c.AccountGroup, c.Group, c.PromoCode, c.PromoCodeUsage,
+		c.Proxy, c.RedeemCode, c.Setting, c.UsageLog, c.User, c.UserAllowedGroup,
+		c.UserAttributeDefinition, c.UserAttributeValue, c.UserSubscription,
 	} {
 		n.Use(hooks...)
 	}
@@ -265,9 +277,9 @@ func (c *Client) Use(hooks ...Hook) {
 // In order to add interceptors to a specific client, call: `client.Node.Intercept(...)`.
 func (c *Client) Intercept(interceptors ...Interceptor) {
 	for _, n := range []interface{ Intercept(...Interceptor) }{
-		c.APIKey, c.Account, c.AccountGroup, c.Group, c.Proxy, c.RedeemCode, c.Setting,
-		c.UsageLog, c.User, c.UserAllowedGroup, c.UserAttributeDefinition,
-		c.UserAttributeValue, c.UserSubscription,
+		c.APIKey, c.Account, c.AccountGroup, c.Group, c.PromoCode, c.PromoCodeUsage,
+		c.Proxy, c.RedeemCode, c.Setting, c.UsageLog, c.User, c.UserAllowedGroup,
+		c.UserAttributeDefinition, c.UserAttributeValue, c.UserSubscription,
 	} {
 		n.Intercept(interceptors...)
 	}
@@ -284,6 +296,10 @@ func (c *Client) Mutate(ctx context.Context, m Mutation) (Value, error) {
 		return c.AccountGroup.mutate(ctx, m)
 	case *GroupMutation:
 		return c.Group.mutate(ctx, m)
+	case *PromoCodeMutation:
+		return c.PromoCode.mutate(ctx, m)
+	case *PromoCodeUsageMutation:
+		return c.PromoCodeUsage.mutate(ctx, m)
 	case *ProxyMutation:
 		return c.Proxy.mutate(ctx, m)
 	case *RedeemCodeMutation:
@@ -1068,6 +1084,320 @@ func (c *GroupClient) mutate(ctx context.Context, m *GroupMutation) (Value, erro
 	}
 }
 
+// PromoCodeClient is a client for the PromoCode schema.
+type PromoCodeClient struct {
+	config
+}
+
+// NewPromoCodeClient returns a client for the PromoCode from the given config.
+func NewPromoCodeClient(c config) *PromoCodeClient {
+	return &PromoCodeClient{config: c}
+}
+
+// Use adds a list of mutation hooks to the hooks stack.
+// A call to `Use(f, g, h)` equals to `promocode.Hooks(f(g(h())))`.
+func (c *PromoCodeClient) Use(hooks ...Hook) {
+	c.hooks.PromoCode = append(c.hooks.PromoCode, hooks...)
+}
+
+// Intercept adds a list of query interceptors to the interceptors stack.
+// A call to `Intercept(f, g, h)` equals to `promocode.Intercept(f(g(h())))`.
+func (c *PromoCodeClient) Intercept(interceptors ...Interceptor) {
+	c.inters.PromoCode = append(c.inters.PromoCode, interceptors...)
+}
+
+// Create returns a builder for creating a PromoCode entity.
+func (c *PromoCodeClient) Create() *PromoCodeCreate {
+	mutation := newPromoCodeMutation(c.config, OpCreate)
+	return &PromoCodeCreate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// CreateBulk returns a builder for creating a bulk of PromoCode entities.
+func (c *PromoCodeClient) CreateBulk(builders ...*PromoCodeCreate) *PromoCodeCreateBulk {
+	return &PromoCodeCreateBulk{config: c.config, builders: builders}
+}
+
+// MapCreateBulk creates a bulk creation builder from the given slice. For each item in the slice, the function creates
+// a builder and applies setFunc on it.
+func (c *PromoCodeClient) MapCreateBulk(slice any, setFunc func(*PromoCodeCreate, int)) *PromoCodeCreateBulk {
+	rv := reflect.ValueOf(slice)
+	if rv.Kind() != reflect.Slice {
+		return &PromoCodeCreateBulk{err: fmt.Errorf("calling to PromoCodeClient.MapCreateBulk with wrong type %T, need slice", slice)}
+	}
+	builders := make([]*PromoCodeCreate, rv.Len())
+	for i := 0; i < rv.Len(); i++ {
+		builders[i] = c.Create()
+		setFunc(builders[i], i)
+	}
+	return &PromoCodeCreateBulk{config: c.config, builders: builders}
+}
+
+// Update returns an update builder for PromoCode.
+func (c *PromoCodeClient) Update() *PromoCodeUpdate {
+	mutation := newPromoCodeMutation(c.config, OpUpdate)
+	return &PromoCodeUpdate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOne returns an update builder for the given entity.
+func (c *PromoCodeClient) UpdateOne(_m *PromoCode) *PromoCodeUpdateOne {
+	mutation := newPromoCodeMutation(c.config, OpUpdateOne, withPromoCode(_m))
+	return &PromoCodeUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOneID returns an update builder for the given id.
+func (c *PromoCodeClient) UpdateOneID(id int64) *PromoCodeUpdateOne {
+	mutation := newPromoCodeMutation(c.config, OpUpdateOne, withPromoCodeID(id))
+	return &PromoCodeUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// Delete returns a delete builder for PromoCode.
+func (c *PromoCodeClient) Delete() *PromoCodeDelete {
+	mutation := newPromoCodeMutation(c.config, OpDelete)
+	return &PromoCodeDelete{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// DeleteOne returns a builder for deleting the given entity.
+func (c *PromoCodeClient) DeleteOne(_m *PromoCode) *PromoCodeDeleteOne {
+	return c.DeleteOneID(_m.ID)
+}
+
+// DeleteOneID returns a builder for deleting the given entity by its id.
+func (c *PromoCodeClient) DeleteOneID(id int64) *PromoCodeDeleteOne {
+	builder := c.Delete().Where(promocode.ID(id))
+	builder.mutation.id = &id
+	builder.mutation.op = OpDeleteOne
+	return &PromoCodeDeleteOne{builder}
+}
+
+// Query returns a query builder for PromoCode.
+func (c *PromoCodeClient) Query() *PromoCodeQuery {
+	return &PromoCodeQuery{
+		config: c.config,
+		ctx:    &QueryContext{Type: TypePromoCode},
+		inters: c.Interceptors(),
+	}
+}
+
+// Get returns a PromoCode entity by its id.
+func (c *PromoCodeClient) Get(ctx context.Context, id int64) (*PromoCode, error) {
+	return c.Query().Where(promocode.ID(id)).Only(ctx)
+}
+
+// GetX is like Get, but panics if an error occurs.
+func (c *PromoCodeClient) GetX(ctx context.Context, id int64) *PromoCode {
+	obj, err := c.Get(ctx, id)
+	if err != nil {
+		panic(err)
+	}
+	return obj
+}
+
+// QueryUsageRecords queries the usage_records edge of a PromoCode.
+func (c *PromoCodeClient) QueryUsageRecords(_m *PromoCode) *PromoCodeUsageQuery {
+	query := (&PromoCodeUsageClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocode.Table, promocode.FieldID, id),
+			sqlgraph.To(promocodeusage.Table, promocodeusage.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, promocode.UsageRecordsTable, promocode.UsageRecordsColumn),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
+// Hooks returns the client hooks.
+func (c *PromoCodeClient) Hooks() []Hook {
+	return c.hooks.PromoCode
+}
+
+// Interceptors returns the client interceptors.
+func (c *PromoCodeClient) Interceptors() []Interceptor {
+	return c.inters.PromoCode
+}
+
+func (c *PromoCodeClient) mutate(ctx context.Context, m *PromoCodeMutation) (Value, error) {
+	switch m.Op() {
+	case OpCreate:
+		return (&PromoCodeCreate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdate:
+		return (&PromoCodeUpdate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdateOne:
+		return (&PromoCodeUpdateOne{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpDelete, OpDeleteOne:
+		return (&PromoCodeDelete{config: c.config, hooks: c.Hooks(), mutation: m}).Exec(ctx)
+	default:
+		return nil, fmt.Errorf("ent: unknown PromoCode mutation op: %q", m.Op())
+	}
+}
+
+// PromoCodeUsageClient is a client for the PromoCodeUsage schema.
+type PromoCodeUsageClient struct {
+	config
+}
+
+// NewPromoCodeUsageClient returns a client for the PromoCodeUsage from the given config.
+func NewPromoCodeUsageClient(c config) *PromoCodeUsageClient {
+	return &PromoCodeUsageClient{config: c}
+}
+
+// Use adds a list of mutation hooks to the hooks stack.
+// A call to `Use(f, g, h)` equals to `promocodeusage.Hooks(f(g(h())))`.
+func (c *PromoCodeUsageClient) Use(hooks ...Hook) {
+	c.hooks.PromoCodeUsage = append(c.hooks.PromoCodeUsage, hooks...)
+}
+
+// Intercept adds a list of query interceptors to the interceptors stack.
+// A call to `Intercept(f, g, h)` equals to `promocodeusage.Intercept(f(g(h())))`.
+func (c *PromoCodeUsageClient) Intercept(interceptors ...Interceptor) {
+	c.inters.PromoCodeUsage = append(c.inters.PromoCodeUsage, interceptors...)
+}
+
+// Create returns a builder for creating a PromoCodeUsage entity.
+func (c *PromoCodeUsageClient) Create() *PromoCodeUsageCreate {
+	mutation := newPromoCodeUsageMutation(c.config, OpCreate)
+	return &PromoCodeUsageCreate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// CreateBulk returns a builder for creating a bulk of PromoCodeUsage entities.
+func (c *PromoCodeUsageClient) CreateBulk(builders ...*PromoCodeUsageCreate) *PromoCodeUsageCreateBulk {
+	return &PromoCodeUsageCreateBulk{config: c.config, builders: builders}
+}
+
+// MapCreateBulk creates a bulk creation builder from the given slice. For each item in the slice, the function creates
+// a builder and applies setFunc on it.
+func (c *PromoCodeUsageClient) MapCreateBulk(slice any, setFunc func(*PromoCodeUsageCreate, int)) *PromoCodeUsageCreateBulk {
+	rv := reflect.ValueOf(slice)
+	if rv.Kind() != reflect.Slice {
+		return &PromoCodeUsageCreateBulk{err: fmt.Errorf("calling to PromoCodeUsageClient.MapCreateBulk with wrong type %T, need slice", slice)}
+	}
+	builders := make([]*PromoCodeUsageCreate, rv.Len())
+	for i := 0; i < rv.Len(); i++ {
+		builders[i] = c.Create()
+		setFunc(builders[i], i)
+	}
+	return &PromoCodeUsageCreateBulk{config: c.config, builders: builders}
+}
+
+// Update returns an update builder for PromoCodeUsage.
+func (c *PromoCodeUsageClient) Update() *PromoCodeUsageUpdate {
+	mutation := newPromoCodeUsageMutation(c.config, OpUpdate)
+	return &PromoCodeUsageUpdate{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOne returns an update builder for the given entity.
+func (c *PromoCodeUsageClient) UpdateOne(_m *PromoCodeUsage) *PromoCodeUsageUpdateOne {
+	mutation := newPromoCodeUsageMutation(c.config, OpUpdateOne, withPromoCodeUsage(_m))
+	return &PromoCodeUsageUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// UpdateOneID returns an update builder for the given id.
+func (c *PromoCodeUsageClient) UpdateOneID(id int64) *PromoCodeUsageUpdateOne {
+	mutation := newPromoCodeUsageMutation(c.config, OpUpdateOne, withPromoCodeUsageID(id))
+	return &PromoCodeUsageUpdateOne{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// Delete returns a delete builder for PromoCodeUsage.
+func (c *PromoCodeUsageClient) Delete() *PromoCodeUsageDelete {
+	mutation := newPromoCodeUsageMutation(c.config, OpDelete)
+	return &PromoCodeUsageDelete{config: c.config, hooks: c.Hooks(), mutation: mutation}
+}
+
+// DeleteOne returns a builder for deleting the given entity.
+func (c *PromoCodeUsageClient) DeleteOne(_m *PromoCodeUsage) *PromoCodeUsageDeleteOne {
+	return c.DeleteOneID(_m.ID)
+}
+
+// DeleteOneID returns a builder for deleting the given entity by its id.
+func (c *PromoCodeUsageClient) DeleteOneID(id int64) *PromoCodeUsageDeleteOne {
+	builder := c.Delete().Where(promocodeusage.ID(id))
+	builder.mutation.id = &id
+	builder.mutation.op = OpDeleteOne
+	return &PromoCodeUsageDeleteOne{builder}
+}
+
+// Query returns a query builder for PromoCodeUsage.
+func (c *PromoCodeUsageClient) Query() *PromoCodeUsageQuery {
+	return &PromoCodeUsageQuery{
+		config: c.config,
+		ctx:    &QueryContext{Type: TypePromoCodeUsage},
+		inters: c.Interceptors(),
+	}
+}
+
+// Get returns a PromoCodeUsage entity by its id.
+func (c *PromoCodeUsageClient) Get(ctx context.Context, id int64) (*PromoCodeUsage, error) {
+	return c.Query().Where(promocodeusage.ID(id)).Only(ctx)
+}
+
+// GetX is like Get, but panics if an error occurs.
+func (c *PromoCodeUsageClient) GetX(ctx context.Context, id int64) *PromoCodeUsage {
+	obj, err := c.Get(ctx, id)
+	if err != nil {
+		panic(err)
+	}
+	return obj
+}
+
+// QueryPromoCode queries the promo_code edge of a PromoCodeUsage.
+func (c *PromoCodeUsageClient) QueryPromoCode(_m *PromoCodeUsage) *PromoCodeQuery {
+	query := (&PromoCodeClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocodeusage.Table, promocodeusage.FieldID, id),
+			sqlgraph.To(promocode.Table, promocode.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, promocodeusage.PromoCodeTable, promocodeusage.PromoCodeColumn),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
+// QueryUser queries the user edge of a PromoCodeUsage.
+func (c *PromoCodeUsageClient) QueryUser(_m *PromoCodeUsage) *UserQuery {
+	query := (&UserClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocodeusage.Table, promocodeusage.FieldID, id),
+			sqlgraph.To(user.Table, user.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, promocodeusage.UserTable, promocodeusage.UserColumn),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
+// Hooks returns the client hooks.
+func (c *PromoCodeUsageClient) Hooks() []Hook {
+	return c.hooks.PromoCodeUsage
+}
+
+// Interceptors returns the client interceptors.
+func (c *PromoCodeUsageClient) Interceptors() []Interceptor {
+	return c.inters.PromoCodeUsage
+}
+
+func (c *PromoCodeUsageClient) mutate(ctx context.Context, m *PromoCodeUsageMutation) (Value, error) {
+	switch m.Op() {
+	case OpCreate:
+		return (&PromoCodeUsageCreate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdate:
+		return (&PromoCodeUsageUpdate{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpUpdateOne:
+		return (&PromoCodeUsageUpdateOne{config: c.config, hooks: c.Hooks(), mutation: m}).Save(ctx)
+	case OpDelete, OpDeleteOne:
+		return (&PromoCodeUsageDelete{config: c.config, hooks: c.Hooks(), mutation: m}).Exec(ctx)
+	default:
+		return nil, fmt.Errorf("ent: unknown PromoCodeUsage mutation op: %q", m.Op())
+	}
+}
+
 // ProxyClient is a client for the Proxy schema.
 type ProxyClient struct {
 	config
@@ -1950,6 +2280,22 @@ func (c *UserClient) QueryAttributeValues(_m *User) *UserAttributeValueQuery {
 	return query
 }
 
+// QueryPromoCodeUsages queries the promo_code_usages edge of a User.
+func (c *UserClient) QueryPromoCodeUsages(_m *User) *PromoCodeUsageQuery {
+	query := (&PromoCodeUsageClient{config: c.config}).Query()
+	query.path = func(context.Context) (fromV *sql.Selector, _ error) {
+		id := _m.ID
+		step := sqlgraph.NewStep(
+			sqlgraph.From(user.Table, user.FieldID, id),
+			sqlgraph.To(promocodeusage.Table, promocodeusage.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, user.PromoCodeUsagesTable, user.PromoCodeUsagesColumn),
+		)
+		fromV = sqlgraph.Neighbors(_m.driver.Dialect(), step)
+		return fromV, nil
+	}
+	return query
+}
+
 // QueryUserAllowedGroups queries the user_allowed_groups edge of a User.
 func (c *UserClient) QueryUserAllowedGroups(_m *User) *UserAllowedGroupQuery {
 	query := (&UserAllowedGroupClient{config: c.config}).Query()
@@ -2627,14 +2973,14 @@ func (c *UserSubscriptionClient) mutate(ctx context.Context, m *UserSubscription
 // hooks and interceptors per client, for fast access.
 type (
 	hooks struct {
-		APIKey, Account, AccountGroup, Group, Proxy, RedeemCode, Setting, UsageLog,
-		User, UserAllowedGroup, UserAttributeDefinition, UserAttributeValue,
-		UserSubscription []ent.Hook
+		APIKey, Account, AccountGroup, Group, PromoCode, PromoCodeUsage, Proxy,
+		RedeemCode, Setting, UsageLog, User, UserAllowedGroup, UserAttributeDefinition,
+		UserAttributeValue, UserSubscription []ent.Hook
 	}
 	inters struct {
-		APIKey, Account, AccountGroup, Group, Proxy, RedeemCode, Setting, UsageLog,
-		User, UserAllowedGroup, UserAttributeDefinition, UserAttributeValue,
-		UserSubscription []ent.Interceptor
+		APIKey, Account, AccountGroup, Group, PromoCode, PromoCodeUsage, Proxy,
+		RedeemCode, Setting, UsageLog, User, UserAllowedGroup, UserAttributeDefinition,
+		UserAttributeValue, UserSubscription []ent.Interceptor
 	}
 )
 

backend/ent/ent.go

@@ -16,6 +16,8 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/accountgroup"
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/proxy"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/setting"
@@ -89,6 +91,8 @@ func checkColumn(t, c string) error {
 			account.Table:                 account.ValidColumn,
 			accountgroup.Table:            accountgroup.ValidColumn,
 			group.Table:                   group.ValidColumn,
+			promocode.Table:               promocode.ValidColumn,
+			promocodeusage.Table:          promocodeusage.ValidColumn,
 			proxy.Table:                   proxy.ValidColumn,
 			redeemcode.Table:              redeemcode.ValidColumn,
 			setting.Table:                 setting.ValidColumn,

backend/ent/generate.go

@@ -2,4 +2,5 @@
 package ent
 
 // 启用 sql/execquery 以生成 ExecContext/QueryContext 的透传接口，便于事务内执行原生 SQL。
-//go:generate go run -mod=mod entgo.io/ent/cmd/ent generate --feature sql/upsert,intercept,sql/execquery --idtype int64 ./schema
+// 启用 sql/lock 以支持 FOR UPDATE 行锁。
+//go:generate go run -mod=mod entgo.io/ent/cmd/ent generate --feature sql/upsert,intercept,sql/execquery,sql/lock --idtype int64 ./schema

backend/ent/group_query.go

@@ -9,6 +9,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -39,6 +40,7 @@ type GroupQuery struct {
 	withAllowedUsers      *UserQuery
 	withAccountGroups     *AccountGroupQuery
 	withUserAllowedGroups *UserAllowedGroupQuery
+	modifiers             []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -643,6 +645,9 @@ func (_q *GroupQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Group,
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -1025,6 +1030,9 @@ func (_q *GroupQuery) loadUserAllowedGroups(ctx context.Context, query *UserAllo
 
 func (_q *GroupQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -1087,6 +1095,9 @@ func (_q *GroupQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -1104,6 +1115,32 @@ func (_q *GroupQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *GroupQuery) ForUpdate(opts ...sql.LockOption) *GroupQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *GroupQuery) ForShare(opts ...sql.LockOption) *GroupQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // GroupGroupBy is the group-by builder for Group entities.
 type GroupGroupBy struct {
 	selector

backend/ent/hook/hook.go

@@ -57,6 +57,30 @@ func (f GroupFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error
 	return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.GroupMutation", m)
 }
 
+// The PromoCodeFunc type is an adapter to allow the use of ordinary
+// function as PromoCode mutator.
+type PromoCodeFunc func(context.Context, *ent.PromoCodeMutation) (ent.Value, error)
+
+// Mutate calls f(ctx, m).
+func (f PromoCodeFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
+	if mv, ok := m.(*ent.PromoCodeMutation); ok {
+		return f(ctx, mv)
+	}
+	return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.PromoCodeMutation", m)
+}
+
+// The PromoCodeUsageFunc type is an adapter to allow the use of ordinary
+// function as PromoCodeUsage mutator.
+type PromoCodeUsageFunc func(context.Context, *ent.PromoCodeUsageMutation) (ent.Value, error)
+
+// Mutate calls f(ctx, m).
+func (f PromoCodeUsageFunc) Mutate(ctx context.Context, m ent.Mutation) (ent.Value, error) {
+	if mv, ok := m.(*ent.PromoCodeUsageMutation); ok {
+		return f(ctx, mv)
+	}
+	return nil, fmt.Errorf("unexpected mutation type %T. expect *ent.PromoCodeUsageMutation", m)
+}
+
 // The ProxyFunc type is an adapter to allow the use of ordinary
 // function as Proxy mutator.
 type ProxyFunc func(context.Context, *ent.ProxyMutation) (ent.Value, error)

backend/ent/intercept/intercept.go

@@ -13,6 +13,8 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
 	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/proxy"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/setting"
@@ -188,6 +190,60 @@ func (f TraverseGroup) Traverse(ctx context.Context, q ent.Query) error {
 	return fmt.Errorf("unexpected query type %T. expect *ent.GroupQuery", q)
 }
 
+// The PromoCodeFunc type is an adapter to allow the use of ordinary function as a Querier.
+type PromoCodeFunc func(context.Context, *ent.PromoCodeQuery) (ent.Value, error)
+
+// Query calls f(ctx, q).
+func (f PromoCodeFunc) Query(ctx context.Context, q ent.Query) (ent.Value, error) {
+	if q, ok := q.(*ent.PromoCodeQuery); ok {
+		return f(ctx, q)
+	}
+	return nil, fmt.Errorf("unexpected query type %T. expect *ent.PromoCodeQuery", q)
+}
+
+// The TraversePromoCode type is an adapter to allow the use of ordinary function as Traverser.
+type TraversePromoCode func(context.Context, *ent.PromoCodeQuery) error
+
+// Intercept is a dummy implementation of Intercept that returns the next Querier in the pipeline.
+func (f TraversePromoCode) Intercept(next ent.Querier) ent.Querier {
+	return next
+}
+
+// Traverse calls f(ctx, q).
+func (f TraversePromoCode) Traverse(ctx context.Context, q ent.Query) error {
+	if q, ok := q.(*ent.PromoCodeQuery); ok {
+		return f(ctx, q)
+	}
+	return fmt.Errorf("unexpected query type %T. expect *ent.PromoCodeQuery", q)
+}
+
+// The PromoCodeUsageFunc type is an adapter to allow the use of ordinary function as a Querier.
+type PromoCodeUsageFunc func(context.Context, *ent.PromoCodeUsageQuery) (ent.Value, error)
+
+// Query calls f(ctx, q).
+func (f PromoCodeUsageFunc) Query(ctx context.Context, q ent.Query) (ent.Value, error) {
+	if q, ok := q.(*ent.PromoCodeUsageQuery); ok {
+		return f(ctx, q)
+	}
+	return nil, fmt.Errorf("unexpected query type %T. expect *ent.PromoCodeUsageQuery", q)
+}
+
+// The TraversePromoCodeUsage type is an adapter to allow the use of ordinary function as Traverser.
+type TraversePromoCodeUsage func(context.Context, *ent.PromoCodeUsageQuery) error
+
+// Intercept is a dummy implementation of Intercept that returns the next Querier in the pipeline.
+func (f TraversePromoCodeUsage) Intercept(next ent.Querier) ent.Querier {
+	return next
+}
+
+// Traverse calls f(ctx, q).
+func (f TraversePromoCodeUsage) Traverse(ctx context.Context, q ent.Query) error {
+	if q, ok := q.(*ent.PromoCodeUsageQuery); ok {
+		return f(ctx, q)
+	}
+	return fmt.Errorf("unexpected query type %T. expect *ent.PromoCodeUsageQuery", q)
+}
+
 // The ProxyFunc type is an adapter to allow the use of ordinary function as a Querier.
 type ProxyFunc func(context.Context, *ent.ProxyQuery) (ent.Value, error)
 
@@ -442,6 +498,10 @@ func NewQuery(q ent.Query) (Query, error) {
 		return &query[*ent.AccountGroupQuery, predicate.AccountGroup, accountgroup.OrderOption]{typ: ent.TypeAccountGroup, tq: q}, nil
 	case *ent.GroupQuery:
 		return &query[*ent.GroupQuery, predicate.Group, group.OrderOption]{typ: ent.TypeGroup, tq: q}, nil
+	case *ent.PromoCodeQuery:
+		return &query[*ent.PromoCodeQuery, predicate.PromoCode, promocode.OrderOption]{typ: ent.TypePromoCode, tq: q}, nil
+	case *ent.PromoCodeUsageQuery:
+		return &query[*ent.PromoCodeUsageQuery, predicate.PromoCodeUsage, promocodeusage.OrderOption]{typ: ent.TypePromoCodeUsage, tq: q}, nil
 	case *ent.ProxyQuery:
 		return &query[*ent.ProxyQuery, predicate.Proxy, proxy.OrderOption]{typ: ent.TypeProxy, tq: q}, nil
 	case *ent.RedeemCodeQuery:

backend/ent/migrate/schema.go

@@ -259,6 +259,82 @@ var (
 			},
 		},
 	}
+	// PromoCodesColumns holds the columns for the "promo_codes" table.
+	PromoCodesColumns = []*schema.Column{
+		{Name: "id", Type: field.TypeInt64, Increment: true},
+		{Name: "code", Type: field.TypeString, Unique: true, Size: 32},
+		{Name: "bonus_amount", Type: field.TypeFloat64, Default: 0, SchemaType: map[string]string{"postgres": "decimal(20,8)"}},
+		{Name: "max_uses", Type: field.TypeInt, Default: 0},
+		{Name: "used_count", Type: field.TypeInt, Default: 0},
+		{Name: "status", Type: field.TypeString, Size: 20, Default: "active"},
+		{Name: "expires_at", Type: field.TypeTime, Nullable: true, SchemaType: map[string]string{"postgres": "timestamptz"}},
+		{Name: "notes", Type: field.TypeString, Nullable: true, SchemaType: map[string]string{"postgres": "text"}},
+		{Name: "created_at", Type: field.TypeTime, SchemaType: map[string]string{"postgres": "timestamptz"}},
+		{Name: "updated_at", Type: field.TypeTime, SchemaType: map[string]string{"postgres": "timestamptz"}},
+	}
+	// PromoCodesTable holds the schema information for the "promo_codes" table.
+	PromoCodesTable = &schema.Table{
+		Name:       "promo_codes",
+		Columns:    PromoCodesColumns,
+		PrimaryKey: []*schema.Column{PromoCodesColumns[0]},
+		Indexes: []*schema.Index{
+			{
+				Name:    "promocode_status",
+				Unique:  false,
+				Columns: []*schema.Column{PromoCodesColumns[5]},
+			},
+			{
+				Name:    "promocode_expires_at",
+				Unique:  false,
+				Columns: []*schema.Column{PromoCodesColumns[6]},
+			},
+		},
+	}
+	// PromoCodeUsagesColumns holds the columns for the "promo_code_usages" table.
+	PromoCodeUsagesColumns = []*schema.Column{
+		{Name: "id", Type: field.TypeInt64, Increment: true},
+		{Name: "bonus_amount", Type: field.TypeFloat64, SchemaType: map[string]string{"postgres": "decimal(20,8)"}},
+		{Name: "used_at", Type: field.TypeTime, SchemaType: map[string]string{"postgres": "timestamptz"}},
+		{Name: "promo_code_id", Type: field.TypeInt64},
+		{Name: "user_id", Type: field.TypeInt64},
+	}
+	// PromoCodeUsagesTable holds the schema information for the "promo_code_usages" table.
+	PromoCodeUsagesTable = &schema.Table{
+		Name:       "promo_code_usages",
+		Columns:    PromoCodeUsagesColumns,
+		PrimaryKey: []*schema.Column{PromoCodeUsagesColumns[0]},
+		ForeignKeys: []*schema.ForeignKey{
+			{
+				Symbol:     "promo_code_usages_promo_codes_usage_records",
+				Columns:    []*schema.Column{PromoCodeUsagesColumns[3]},
+				RefColumns: []*schema.Column{PromoCodesColumns[0]},
+				OnDelete:   schema.NoAction,
+			},
+			{
+				Symbol:     "promo_code_usages_users_promo_code_usages",
+				Columns:    []*schema.Column{PromoCodeUsagesColumns[4]},
+				RefColumns: []*schema.Column{UsersColumns[0]},
+				OnDelete:   schema.NoAction,
+			},
+		},
+		Indexes: []*schema.Index{
+			{
+				Name:    "promocodeusage_promo_code_id",
+				Unique:  false,
+				Columns: []*schema.Column{PromoCodeUsagesColumns[3]},
+			},
+			{
+				Name:    "promocodeusage_user_id",
+				Unique:  false,
+				Columns: []*schema.Column{PromoCodeUsagesColumns[4]},
+			},
+			{
+				Name:    "promocodeusage_promo_code_id_user_id",
+				Unique:  true,
+				Columns: []*schema.Column{PromoCodeUsagesColumns[3], PromoCodeUsagesColumns[4]},
+			},
+		},
+	}
 	// ProxiesColumns holds the columns for the "proxies" table.
 	ProxiesColumns = []*schema.Column{
 		{Name: "id", Type: field.TypeInt64, Increment: true},
@@ -720,6 +796,8 @@ var (
 		AccountsTable,
 		AccountGroupsTable,
 		GroupsTable,
+		PromoCodesTable,
+		PromoCodeUsagesTable,
 		ProxiesTable,
 		RedeemCodesTable,
 		SettingsTable,
@@ -750,6 +828,14 @@ func init() {
 	GroupsTable.Annotation = &entsql.Annotation{
 		Table: "groups",
 	}
+	PromoCodesTable.Annotation = &entsql.Annotation{
+		Table: "promo_codes",
+	}
+	PromoCodeUsagesTable.ForeignKeys[0].RefTable = PromoCodesTable
+	PromoCodeUsagesTable.ForeignKeys[1].RefTable = UsersTable
+	PromoCodeUsagesTable.Annotation = &entsql.Annotation{
+		Table: "promo_code_usages",
+	}
 	ProxiesTable.Annotation = &entsql.Annotation{
 		Table: "proxies",
 	}

backend/ent/predicate/predicate.go

@@ -18,6 +18,12 @@ type AccountGroup func(*sql.Selector)
 // Group is the predicate function for group builders.
 type Group func(*sql.Selector)
 
+// PromoCode is the predicate function for promocode builders.
+type PromoCode func(*sql.Selector)
+
+// PromoCodeUsage is the predicate function for promocodeusage builders.
+type PromoCodeUsage func(*sql.Selector)
+
 // Proxy is the predicate function for proxy builders.
 type Proxy func(*sql.Selector)
 

backend/ent/promocode.go

@@ -0,0 +1,228 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+)
+
+// PromoCode is the model entity for the PromoCode schema.
+type PromoCode struct {
+	config `json:"-"`
+	// ID of the ent.
+	ID int64 `json:"id,omitempty"`
+	// 优惠码
+	Code string `json:"code,omitempty"`
+	// 赠送余额金额
+	BonusAmount float64 `json:"bonus_amount,omitempty"`
+	// 最大使用次数，0表示无限制
+	MaxUses int `json:"max_uses,omitempty"`
+	// 已使用次数
+	UsedCount int `json:"used_count,omitempty"`
+	// 状态: active, disabled
+	Status string `json:"status,omitempty"`
+	// 过期时间，null表示永不过期
+	ExpiresAt *time.Time `json:"expires_at,omitempty"`
+	// 备注
+	Notes *string `json:"notes,omitempty"`
+	// CreatedAt holds the value of the "created_at" field.
+	CreatedAt time.Time `json:"created_at,omitempty"`
+	// UpdatedAt holds the value of the "updated_at" field.
+	UpdatedAt time.Time `json:"updated_at,omitempty"`
+	// Edges holds the relations/edges for other nodes in the graph.
+	// The values are being populated by the PromoCodeQuery when eager-loading is set.
+	Edges        PromoCodeEdges `json:"edges"`
+	selectValues sql.SelectValues
+}
+
+// PromoCodeEdges holds the relations/edges for other nodes in the graph.
+type PromoCodeEdges struct {
+	// UsageRecords holds the value of the usage_records edge.
+	UsageRecords []*PromoCodeUsage `json:"usage_records,omitempty"`
+	// loadedTypes holds the information for reporting if a
+	// type was loaded (or requested) in eager-loading or not.
+	loadedTypes [1]bool
+}
+
+// UsageRecordsOrErr returns the UsageRecords value or an error if the edge
+// was not loaded in eager-loading.
+func (e PromoCodeEdges) UsageRecordsOrErr() ([]*PromoCodeUsage, error) {
+	if e.loadedTypes[0] {
+		return e.UsageRecords, nil
+	}
+	return nil, &NotLoadedError{edge: "usage_records"}
+}
+
+// scanValues returns the types for scanning values from sql.Rows.
+func (*PromoCode) scanValues(columns []string) ([]any, error) {
+	values := make([]any, len(columns))
+	for i := range columns {
+		switch columns[i] {
+		case promocode.FieldBonusAmount:
+			values[i] = new(sql.NullFloat64)
+		case promocode.FieldID, promocode.FieldMaxUses, promocode.FieldUsedCount:
+			values[i] = new(sql.NullInt64)
+		case promocode.FieldCode, promocode.FieldStatus, promocode.FieldNotes:
+			values[i] = new(sql.NullString)
+		case promocode.FieldExpiresAt, promocode.FieldCreatedAt, promocode.FieldUpdatedAt:
+			values[i] = new(sql.NullTime)
+		default:
+			values[i] = new(sql.UnknownType)
+		}
+	}
+	return values, nil
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the PromoCode fields.
+func (_m *PromoCode) assignValues(columns []string, values []any) error {
+	if m, n := len(values), len(columns); m < n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	for i := range columns {
+		switch columns[i] {
+		case promocode.FieldID:
+			value, ok := values[i].(*sql.NullInt64)
+			if !ok {
+				return fmt.Errorf("unexpected type %T for field id", value)
+			}
+			_m.ID = int64(value.Int64)
+		case promocode.FieldCode:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field code", values[i])
+			} else if value.Valid {
+				_m.Code = value.String
+			}
+		case promocode.FieldBonusAmount:
+			if value, ok := values[i].(*sql.NullFloat64); !ok {
+				return fmt.Errorf("unexpected type %T for field bonus_amount", values[i])
+			} else if value.Valid {
+				_m.BonusAmount = value.Float64
+			}
+		case promocode.FieldMaxUses:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for field max_uses", values[i])
+			} else if value.Valid {
+				_m.MaxUses = int(value.Int64)
+			}
+		case promocode.FieldUsedCount:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for field used_count", values[i])
+			} else if value.Valid {
+				_m.UsedCount = int(value.Int64)
+			}
+		case promocode.FieldStatus:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field status", values[i])
+			} else if value.Valid {
+				_m.Status = value.String
+			}
+		case promocode.FieldExpiresAt:
+			if value, ok := values[i].(*sql.NullTime); !ok {
+				return fmt.Errorf("unexpected type %T for field expires_at", values[i])
+			} else if value.Valid {
+				_m.ExpiresAt = new(time.Time)
+				*_m.ExpiresAt = value.Time
+			}
+		case promocode.FieldNotes:
+			if value, ok := values[i].(*sql.NullString); !ok {
+				return fmt.Errorf("unexpected type %T for field notes", values[i])
+			} else if value.Valid {
+				_m.Notes = new(string)
+				*_m.Notes = value.String
+			}
+		case promocode.FieldCreatedAt:
+			if value, ok := values[i].(*sql.NullTime); !ok {
+				return fmt.Errorf("unexpected type %T for field created_at", values[i])
+			} else if value.Valid {
+				_m.CreatedAt = value.Time
+			}
+		case promocode.FieldUpdatedAt:
+			if value, ok := values[i].(*sql.NullTime); !ok {
+				return fmt.Errorf("unexpected type %T for field updated_at", values[i])
+			} else if value.Valid {
+				_m.UpdatedAt = value.Time
+			}
+		default:
+			_m.selectValues.Set(columns[i], values[i])
+		}
+	}
+	return nil
+}
+
+// Value returns the ent.Value that was dynamically selected and assigned to the PromoCode.
+// This includes values selected through modifiers, order, etc.
+func (_m *PromoCode) Value(name string) (ent.Value, error) {
+	return _m.selectValues.Get(name)
+}
+
+// QueryUsageRecords queries the "usage_records" edge of the PromoCode entity.
+func (_m *PromoCode) QueryUsageRecords() *PromoCodeUsageQuery {
+	return NewPromoCodeClient(_m.config).QueryUsageRecords(_m)
+}
+
+// Update returns a builder for updating this PromoCode.
+// Note that you need to call PromoCode.Unwrap() before calling this method if this PromoCode
+// was returned from a transaction, and the transaction was committed or rolled back.
+func (_m *PromoCode) Update() *PromoCodeUpdateOne {
+	return NewPromoCodeClient(_m.config).UpdateOne(_m)
+}
+
+// Unwrap unwraps the PromoCode entity that was returned from a transaction after it was closed,
+// so that all future queries will be executed through the driver which created the transaction.
+func (_m *PromoCode) Unwrap() *PromoCode {
+	_tx, ok := _m.config.driver.(*txDriver)
+	if !ok {
+		panic("ent: PromoCode is not a transactional entity")
+	}
+	_m.config.driver = _tx.drv
+	return _m
+}
+
+// String implements the fmt.Stringer.
+func (_m *PromoCode) String() string {
+	var builder strings.Builder
+	builder.WriteString("PromoCode(")
+	builder.WriteString(fmt.Sprintf("id=%v, ", _m.ID))
+	builder.WriteString("code=")
+	builder.WriteString(_m.Code)
+	builder.WriteString(", ")
+	builder.WriteString("bonus_amount=")
+	builder.WriteString(fmt.Sprintf("%v", _m.BonusAmount))
+	builder.WriteString(", ")
+	builder.WriteString("max_uses=")
+	builder.WriteString(fmt.Sprintf("%v", _m.MaxUses))
+	builder.WriteString(", ")
+	builder.WriteString("used_count=")
+	builder.WriteString(fmt.Sprintf("%v", _m.UsedCount))
+	builder.WriteString(", ")
+	builder.WriteString("status=")
+	builder.WriteString(_m.Status)
+	builder.WriteString(", ")
+	if v := _m.ExpiresAt; v != nil {
+		builder.WriteString("expires_at=")
+		builder.WriteString(v.Format(time.ANSIC))
+	}
+	builder.WriteString(", ")
+	if v := _m.Notes; v != nil {
+		builder.WriteString("notes=")
+		builder.WriteString(*v)
+	}
+	builder.WriteString(", ")
+	builder.WriteString("created_at=")
+	builder.WriteString(_m.CreatedAt.Format(time.ANSIC))
+	builder.WriteString(", ")
+	builder.WriteString("updated_at=")
+	builder.WriteString(_m.UpdatedAt.Format(time.ANSIC))
+	builder.WriteByte(')')
+	return builder.String()
+}
+
+// PromoCodes is a parsable slice of PromoCode.
+type PromoCodes []*PromoCode

backend/ent/promocode/promocode.go

@@ -0,0 +1,165 @@
+// Code generated by ent, DO NOT EDIT.
+
+package promocode
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+const (
+	// Label holds the string label denoting the promocode type in the database.
+	Label = "promo_code"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// FieldCode holds the string denoting the code field in the database.
+	FieldCode = "code"
+	// FieldBonusAmount holds the string denoting the bonus_amount field in the database.
+	FieldBonusAmount = "bonus_amount"
+	// FieldMaxUses holds the string denoting the max_uses field in the database.
+	FieldMaxUses = "max_uses"
+	// FieldUsedCount holds the string denoting the used_count field in the database.
+	FieldUsedCount = "used_count"
+	// FieldStatus holds the string denoting the status field in the database.
+	FieldStatus = "status"
+	// FieldExpiresAt holds the string denoting the expires_at field in the database.
+	FieldExpiresAt = "expires_at"
+	// FieldNotes holds the string denoting the notes field in the database.
+	FieldNotes = "notes"
+	// FieldCreatedAt holds the string denoting the created_at field in the database.
+	FieldCreatedAt = "created_at"
+	// FieldUpdatedAt holds the string denoting the updated_at field in the database.
+	FieldUpdatedAt = "updated_at"
+	// EdgeUsageRecords holds the string denoting the usage_records edge name in mutations.
+	EdgeUsageRecords = "usage_records"
+	// Table holds the table name of the promocode in the database.
+	Table = "promo_codes"
+	// UsageRecordsTable is the table that holds the usage_records relation/edge.
+	UsageRecordsTable = "promo_code_usages"
+	// UsageRecordsInverseTable is the table name for the PromoCodeUsage entity.
+	// It exists in this package in order to avoid circular dependency with the "promocodeusage" package.
+	UsageRecordsInverseTable = "promo_code_usages"
+	// UsageRecordsColumn is the table column denoting the usage_records relation/edge.
+	UsageRecordsColumn = "promo_code_id"
+)
+
+// Columns holds all SQL columns for promocode fields.
+var Columns = []string{
+	FieldID,
+	FieldCode,
+	FieldBonusAmount,
+	FieldMaxUses,
+	FieldUsedCount,
+	FieldStatus,
+	FieldExpiresAt,
+	FieldNotes,
+	FieldCreatedAt,
+	FieldUpdatedAt,
+}
+
+// ValidColumn reports if the column name is valid (part of the table columns).
+func ValidColumn(column string) bool {
+	for i := range Columns {
+		if column == Columns[i] {
+			return true
+		}
+	}
+	return false
+}
+
+var (
+	// CodeValidator is a validator for the "code" field. It is called by the builders before save.
+	CodeValidator func(string) error
+	// DefaultBonusAmount holds the default value on creation for the "bonus_amount" field.
+	DefaultBonusAmount float64
+	// DefaultMaxUses holds the default value on creation for the "max_uses" field.
+	DefaultMaxUses int
+	// DefaultUsedCount holds the default value on creation for the "used_count" field.
+	DefaultUsedCount int
+	// DefaultStatus holds the default value on creation for the "status" field.
+	DefaultStatus string
+	// StatusValidator is a validator for the "status" field. It is called by the builders before save.
+	StatusValidator func(string) error
+	// DefaultCreatedAt holds the default value on creation for the "created_at" field.
+	DefaultCreatedAt func() time.Time
+	// DefaultUpdatedAt holds the default value on creation for the "updated_at" field.
+	DefaultUpdatedAt func() time.Time
+	// UpdateDefaultUpdatedAt holds the default value on update for the "updated_at" field.
+	UpdateDefaultUpdatedAt func() time.Time
+)
+
+// OrderOption defines the ordering options for the PromoCode queries.
+type OrderOption func(*sql.Selector)
+
+// ByID orders the results by the id field.
+func ByID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldID, opts...).ToFunc()
+}
+
+// ByCode orders the results by the code field.
+func ByCode(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldCode, opts...).ToFunc()
+}
+
+// ByBonusAmount orders the results by the bonus_amount field.
+func ByBonusAmount(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldBonusAmount, opts...).ToFunc()
+}
+
+// ByMaxUses orders the results by the max_uses field.
+func ByMaxUses(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldMaxUses, opts...).ToFunc()
+}
+
+// ByUsedCount orders the results by the used_count field.
+func ByUsedCount(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUsedCount, opts...).ToFunc()
+}
+
+// ByStatus orders the results by the status field.
+func ByStatus(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldStatus, opts...).ToFunc()
+}
+
+// ByExpiresAt orders the results by the expires_at field.
+func ByExpiresAt(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldExpiresAt, opts...).ToFunc()
+}
+
+// ByNotes orders the results by the notes field.
+func ByNotes(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldNotes, opts...).ToFunc()
+}
+
+// ByCreatedAt orders the results by the created_at field.
+func ByCreatedAt(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldCreatedAt, opts...).ToFunc()
+}
+
+// ByUpdatedAt orders the results by the updated_at field.
+func ByUpdatedAt(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUpdatedAt, opts...).ToFunc()
+}
+
+// ByUsageRecordsCount orders the results by usage_records count.
+func ByUsageRecordsCount(opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborsCount(s, newUsageRecordsStep(), opts...)
+	}
+}
+
+// ByUsageRecords orders the results by usage_records terms.
+func ByUsageRecords(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newUsageRecordsStep(), append([]sql.OrderTerm{term}, terms...)...)
+	}
+}
+func newUsageRecordsStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(UsageRecordsInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.O2M, false, UsageRecordsTable, UsageRecordsColumn),
+	)
+}

backend/ent/promocode/where.go

@@ -0,0 +1,594 @@
+// Code generated by ent, DO NOT EDIT.
+
+package promocode
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldID, id))
+}
+
+// Code applies equality check predicate on the "code" field. It's identical to CodeEQ.
+func Code(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldCode, v))
+}
+
+// BonusAmount applies equality check predicate on the "bonus_amount" field. It's identical to BonusAmountEQ.
+func BonusAmount(v float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldBonusAmount, v))
+}
+
+// MaxUses applies equality check predicate on the "max_uses" field. It's identical to MaxUsesEQ.
+func MaxUses(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldMaxUses, v))
+}
+
+// UsedCount applies equality check predicate on the "used_count" field. It's identical to UsedCountEQ.
+func UsedCount(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldUsedCount, v))
+}
+
+// Status applies equality check predicate on the "status" field. It's identical to StatusEQ.
+func Status(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldStatus, v))
+}
+
+// ExpiresAt applies equality check predicate on the "expires_at" field. It's identical to ExpiresAtEQ.
+func ExpiresAt(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldExpiresAt, v))
+}
+
+// Notes applies equality check predicate on the "notes" field. It's identical to NotesEQ.
+func Notes(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldNotes, v))
+}
+
+// CreatedAt applies equality check predicate on the "created_at" field. It's identical to CreatedAtEQ.
+func CreatedAt(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldCreatedAt, v))
+}
+
+// UpdatedAt applies equality check predicate on the "updated_at" field. It's identical to UpdatedAtEQ.
+func UpdatedAt(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldUpdatedAt, v))
+}
+
+// CodeEQ applies the EQ predicate on the "code" field.
+func CodeEQ(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldCode, v))
+}
+
+// CodeNEQ applies the NEQ predicate on the "code" field.
+func CodeNEQ(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldCode, v))
+}
+
+// CodeIn applies the In predicate on the "code" field.
+func CodeIn(vs ...string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldCode, vs...))
+}
+
+// CodeNotIn applies the NotIn predicate on the "code" field.
+func CodeNotIn(vs ...string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldCode, vs...))
+}
+
+// CodeGT applies the GT predicate on the "code" field.
+func CodeGT(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldCode, v))
+}
+
+// CodeGTE applies the GTE predicate on the "code" field.
+func CodeGTE(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldCode, v))
+}
+
+// CodeLT applies the LT predicate on the "code" field.
+func CodeLT(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldCode, v))
+}
+
+// CodeLTE applies the LTE predicate on the "code" field.
+func CodeLTE(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldCode, v))
+}
+
+// CodeContains applies the Contains predicate on the "code" field.
+func CodeContains(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldContains(FieldCode, v))
+}
+
+// CodeHasPrefix applies the HasPrefix predicate on the "code" field.
+func CodeHasPrefix(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldHasPrefix(FieldCode, v))
+}
+
+// CodeHasSuffix applies the HasSuffix predicate on the "code" field.
+func CodeHasSuffix(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldHasSuffix(FieldCode, v))
+}
+
+// CodeEqualFold applies the EqualFold predicate on the "code" field.
+func CodeEqualFold(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEqualFold(FieldCode, v))
+}
+
+// CodeContainsFold applies the ContainsFold predicate on the "code" field.
+func CodeContainsFold(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldContainsFold(FieldCode, v))
+}
+
+// BonusAmountEQ applies the EQ predicate on the "bonus_amount" field.
+func BonusAmountEQ(v float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldBonusAmount, v))
+}
+
+// BonusAmountNEQ applies the NEQ predicate on the "bonus_amount" field.
+func BonusAmountNEQ(v float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldBonusAmount, v))
+}
+
+// BonusAmountIn applies the In predicate on the "bonus_amount" field.
+func BonusAmountIn(vs ...float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldBonusAmount, vs...))
+}
+
+// BonusAmountNotIn applies the NotIn predicate on the "bonus_amount" field.
+func BonusAmountNotIn(vs ...float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldBonusAmount, vs...))
+}
+
+// BonusAmountGT applies the GT predicate on the "bonus_amount" field.
+func BonusAmountGT(v float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldBonusAmount, v))
+}
+
+// BonusAmountGTE applies the GTE predicate on the "bonus_amount" field.
+func BonusAmountGTE(v float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldBonusAmount, v))
+}
+
+// BonusAmountLT applies the LT predicate on the "bonus_amount" field.
+func BonusAmountLT(v float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldBonusAmount, v))
+}
+
+// BonusAmountLTE applies the LTE predicate on the "bonus_amount" field.
+func BonusAmountLTE(v float64) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldBonusAmount, v))
+}
+
+// MaxUsesEQ applies the EQ predicate on the "max_uses" field.
+func MaxUsesEQ(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldMaxUses, v))
+}
+
+// MaxUsesNEQ applies the NEQ predicate on the "max_uses" field.
+func MaxUsesNEQ(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldMaxUses, v))
+}
+
+// MaxUsesIn applies the In predicate on the "max_uses" field.
+func MaxUsesIn(vs ...int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldMaxUses, vs...))
+}
+
+// MaxUsesNotIn applies the NotIn predicate on the "max_uses" field.
+func MaxUsesNotIn(vs ...int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldMaxUses, vs...))
+}
+
+// MaxUsesGT applies the GT predicate on the "max_uses" field.
+func MaxUsesGT(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldMaxUses, v))
+}
+
+// MaxUsesGTE applies the GTE predicate on the "max_uses" field.
+func MaxUsesGTE(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldMaxUses, v))
+}
+
+// MaxUsesLT applies the LT predicate on the "max_uses" field.
+func MaxUsesLT(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldMaxUses, v))
+}
+
+// MaxUsesLTE applies the LTE predicate on the "max_uses" field.
+func MaxUsesLTE(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldMaxUses, v))
+}
+
+// UsedCountEQ applies the EQ predicate on the "used_count" field.
+func UsedCountEQ(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldUsedCount, v))
+}
+
+// UsedCountNEQ applies the NEQ predicate on the "used_count" field.
+func UsedCountNEQ(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldUsedCount, v))
+}
+
+// UsedCountIn applies the In predicate on the "used_count" field.
+func UsedCountIn(vs ...int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldUsedCount, vs...))
+}
+
+// UsedCountNotIn applies the NotIn predicate on the "used_count" field.
+func UsedCountNotIn(vs ...int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldUsedCount, vs...))
+}
+
+// UsedCountGT applies the GT predicate on the "used_count" field.
+func UsedCountGT(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldUsedCount, v))
+}
+
+// UsedCountGTE applies the GTE predicate on the "used_count" field.
+func UsedCountGTE(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldUsedCount, v))
+}
+
+// UsedCountLT applies the LT predicate on the "used_count" field.
+func UsedCountLT(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldUsedCount, v))
+}
+
+// UsedCountLTE applies the LTE predicate on the "used_count" field.
+func UsedCountLTE(v int) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldUsedCount, v))
+}
+
+// StatusEQ applies the EQ predicate on the "status" field.
+func StatusEQ(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldStatus, v))
+}
+
+// StatusNEQ applies the NEQ predicate on the "status" field.
+func StatusNEQ(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldStatus, v))
+}
+
+// StatusIn applies the In predicate on the "status" field.
+func StatusIn(vs ...string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldStatus, vs...))
+}
+
+// StatusNotIn applies the NotIn predicate on the "status" field.
+func StatusNotIn(vs ...string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldStatus, vs...))
+}
+
+// StatusGT applies the GT predicate on the "status" field.
+func StatusGT(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldStatus, v))
+}
+
+// StatusGTE applies the GTE predicate on the "status" field.
+func StatusGTE(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldStatus, v))
+}
+
+// StatusLT applies the LT predicate on the "status" field.
+func StatusLT(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldStatus, v))
+}
+
+// StatusLTE applies the LTE predicate on the "status" field.
+func StatusLTE(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldStatus, v))
+}
+
+// StatusContains applies the Contains predicate on the "status" field.
+func StatusContains(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldContains(FieldStatus, v))
+}
+
+// StatusHasPrefix applies the HasPrefix predicate on the "status" field.
+func StatusHasPrefix(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldHasPrefix(FieldStatus, v))
+}
+
+// StatusHasSuffix applies the HasSuffix predicate on the "status" field.
+func StatusHasSuffix(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldHasSuffix(FieldStatus, v))
+}
+
+// StatusEqualFold applies the EqualFold predicate on the "status" field.
+func StatusEqualFold(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEqualFold(FieldStatus, v))
+}
+
+// StatusContainsFold applies the ContainsFold predicate on the "status" field.
+func StatusContainsFold(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldContainsFold(FieldStatus, v))
+}
+
+// ExpiresAtEQ applies the EQ predicate on the "expires_at" field.
+func ExpiresAtEQ(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldExpiresAt, v))
+}
+
+// ExpiresAtNEQ applies the NEQ predicate on the "expires_at" field.
+func ExpiresAtNEQ(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldExpiresAt, v))
+}
+
+// ExpiresAtIn applies the In predicate on the "expires_at" field.
+func ExpiresAtIn(vs ...time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldExpiresAt, vs...))
+}
+
+// ExpiresAtNotIn applies the NotIn predicate on the "expires_at" field.
+func ExpiresAtNotIn(vs ...time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldExpiresAt, vs...))
+}
+
+// ExpiresAtGT applies the GT predicate on the "expires_at" field.
+func ExpiresAtGT(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldExpiresAt, v))
+}
+
+// ExpiresAtGTE applies the GTE predicate on the "expires_at" field.
+func ExpiresAtGTE(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldExpiresAt, v))
+}
+
+// ExpiresAtLT applies the LT predicate on the "expires_at" field.
+func ExpiresAtLT(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldExpiresAt, v))
+}
+
+// ExpiresAtLTE applies the LTE predicate on the "expires_at" field.
+func ExpiresAtLTE(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldExpiresAt, v))
+}
+
+// ExpiresAtIsNil applies the IsNil predicate on the "expires_at" field.
+func ExpiresAtIsNil() predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIsNull(FieldExpiresAt))
+}
+
+// ExpiresAtNotNil applies the NotNil predicate on the "expires_at" field.
+func ExpiresAtNotNil() predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotNull(FieldExpiresAt))
+}
+
+// NotesEQ applies the EQ predicate on the "notes" field.
+func NotesEQ(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldNotes, v))
+}
+
+// NotesNEQ applies the NEQ predicate on the "notes" field.
+func NotesNEQ(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldNotes, v))
+}
+
+// NotesIn applies the In predicate on the "notes" field.
+func NotesIn(vs ...string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldNotes, vs...))
+}
+
+// NotesNotIn applies the NotIn predicate on the "notes" field.
+func NotesNotIn(vs ...string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldNotes, vs...))
+}
+
+// NotesGT applies the GT predicate on the "notes" field.
+func NotesGT(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldNotes, v))
+}
+
+// NotesGTE applies the GTE predicate on the "notes" field.
+func NotesGTE(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldNotes, v))
+}
+
+// NotesLT applies the LT predicate on the "notes" field.
+func NotesLT(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldNotes, v))
+}
+
+// NotesLTE applies the LTE predicate on the "notes" field.
+func NotesLTE(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldNotes, v))
+}
+
+// NotesContains applies the Contains predicate on the "notes" field.
+func NotesContains(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldContains(FieldNotes, v))
+}
+
+// NotesHasPrefix applies the HasPrefix predicate on the "notes" field.
+func NotesHasPrefix(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldHasPrefix(FieldNotes, v))
+}
+
+// NotesHasSuffix applies the HasSuffix predicate on the "notes" field.
+func NotesHasSuffix(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldHasSuffix(FieldNotes, v))
+}
+
+// NotesIsNil applies the IsNil predicate on the "notes" field.
+func NotesIsNil() predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIsNull(FieldNotes))
+}
+
+// NotesNotNil applies the NotNil predicate on the "notes" field.
+func NotesNotNil() predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotNull(FieldNotes))
+}
+
+// NotesEqualFold applies the EqualFold predicate on the "notes" field.
+func NotesEqualFold(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEqualFold(FieldNotes, v))
+}
+
+// NotesContainsFold applies the ContainsFold predicate on the "notes" field.
+func NotesContainsFold(v string) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldContainsFold(FieldNotes, v))
+}
+
+// CreatedAtEQ applies the EQ predicate on the "created_at" field.
+func CreatedAtEQ(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldCreatedAt, v))
+}
+
+// CreatedAtNEQ applies the NEQ predicate on the "created_at" field.
+func CreatedAtNEQ(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldCreatedAt, v))
+}
+
+// CreatedAtIn applies the In predicate on the "created_at" field.
+func CreatedAtIn(vs ...time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldCreatedAt, vs...))
+}
+
+// CreatedAtNotIn applies the NotIn predicate on the "created_at" field.
+func CreatedAtNotIn(vs ...time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldCreatedAt, vs...))
+}
+
+// CreatedAtGT applies the GT predicate on the "created_at" field.
+func CreatedAtGT(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldCreatedAt, v))
+}
+
+// CreatedAtGTE applies the GTE predicate on the "created_at" field.
+func CreatedAtGTE(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldCreatedAt, v))
+}
+
+// CreatedAtLT applies the LT predicate on the "created_at" field.
+func CreatedAtLT(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldCreatedAt, v))
+}
+
+// CreatedAtLTE applies the LTE predicate on the "created_at" field.
+func CreatedAtLTE(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldCreatedAt, v))
+}
+
+// UpdatedAtEQ applies the EQ predicate on the "updated_at" field.
+func UpdatedAtEQ(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldEQ(FieldUpdatedAt, v))
+}
+
+// UpdatedAtNEQ applies the NEQ predicate on the "updated_at" field.
+func UpdatedAtNEQ(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNEQ(FieldUpdatedAt, v))
+}
+
+// UpdatedAtIn applies the In predicate on the "updated_at" field.
+func UpdatedAtIn(vs ...time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldIn(FieldUpdatedAt, vs...))
+}
+
+// UpdatedAtNotIn applies the NotIn predicate on the "updated_at" field.
+func UpdatedAtNotIn(vs ...time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldNotIn(FieldUpdatedAt, vs...))
+}
+
+// UpdatedAtGT applies the GT predicate on the "updated_at" field.
+func UpdatedAtGT(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGT(FieldUpdatedAt, v))
+}
+
+// UpdatedAtGTE applies the GTE predicate on the "updated_at" field.
+func UpdatedAtGTE(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldGTE(FieldUpdatedAt, v))
+}
+
+// UpdatedAtLT applies the LT predicate on the "updated_at" field.
+func UpdatedAtLT(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLT(FieldUpdatedAt, v))
+}
+
+// UpdatedAtLTE applies the LTE predicate on the "updated_at" field.
+func UpdatedAtLTE(v time.Time) predicate.PromoCode {
+	return predicate.PromoCode(sql.FieldLTE(FieldUpdatedAt, v))
+}
+
+// HasUsageRecords applies the HasEdge predicate on the "usage_records" edge.
+func HasUsageRecords() predicate.PromoCode {
+	return predicate.PromoCode(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, UsageRecordsTable, UsageRecordsColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasUsageRecordsWith applies the HasEdge predicate on the "usage_records" edge with a given conditions (other predicates).
+func HasUsageRecordsWith(preds ...predicate.PromoCodeUsage) predicate.PromoCode {
+	return predicate.PromoCode(func(s *sql.Selector) {
+		step := newUsageRecordsStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.PromoCode) predicate.PromoCode {
+	return predicate.PromoCode(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.PromoCode) predicate.PromoCode {
+	return predicate.PromoCode(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.PromoCode) predicate.PromoCode {
+	return predicate.PromoCode(sql.NotPredicates(p))
+}

backend/ent/promocode_delete.go

@@ -0,0 +1,88 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+)
+
+// PromoCodeDelete is the builder for deleting a PromoCode entity.
+type PromoCodeDelete struct {
+	config
+	hooks    []Hook
+	mutation *PromoCodeMutation
+}
+
+// Where appends a list predicates to the PromoCodeDelete builder.
+func (_d *PromoCodeDelete) Where(ps ...predicate.PromoCode) *PromoCodeDelete {
+	_d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query and returns how many vertices were deleted.
+func (_d *PromoCodeDelete) Exec(ctx context.Context) (int, error) {
+	return withHooks(ctx, _d.sqlExec, _d.mutation, _d.hooks)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *PromoCodeDelete) ExecX(ctx context.Context) int {
+	n, err := _d.Exec(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+func (_d *PromoCodeDelete) sqlExec(ctx context.Context) (int, error) {
+	_spec := sqlgraph.NewDeleteSpec(promocode.Table, sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64))
+	if ps := _d.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	affected, err := sqlgraph.DeleteNodes(ctx, _d.driver, _spec)
+	if err != nil && sqlgraph.IsConstraintError(err) {
+		err = &ConstraintError{msg: err.Error(), wrap: err}
+	}
+	_d.mutation.done = true
+	return affected, err
+}
+
+// PromoCodeDeleteOne is the builder for deleting a single PromoCode entity.
+type PromoCodeDeleteOne struct {
+	_d *PromoCodeDelete
+}
+
+// Where appends a list predicates to the PromoCodeDelete builder.
+func (_d *PromoCodeDeleteOne) Where(ps ...predicate.PromoCode) *PromoCodeDeleteOne {
+	_d._d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query.
+func (_d *PromoCodeDeleteOne) Exec(ctx context.Context) error {
+	n, err := _d._d.Exec(ctx)
+	switch {
+	case err != nil:
+		return err
+	case n == 0:
+		return &NotFoundError{promocode.Label}
+	default:
+		return nil
+	}
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *PromoCodeDeleteOne) ExecX(ctx context.Context) {
+	if err := _d.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

backend/ent/promocode_query.go

@@ -0,0 +1,643 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"database/sql/driver"
+	"fmt"
+	"math"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+)
+
+// PromoCodeQuery is the builder for querying PromoCode entities.
+type PromoCodeQuery struct {
+	config
+	ctx              *QueryContext
+	order            []promocode.OrderOption
+	inters           []Interceptor
+	predicates       []predicate.PromoCode
+	withUsageRecords *PromoCodeUsageQuery
+	modifiers        []func(*sql.Selector)
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the PromoCodeQuery builder.
+func (_q *PromoCodeQuery) Where(ps ...predicate.PromoCode) *PromoCodeQuery {
+	_q.predicates = append(_q.predicates, ps...)
+	return _q
+}
+
+// Limit the number of records to be returned by this query.
+func (_q *PromoCodeQuery) Limit(limit int) *PromoCodeQuery {
+	_q.ctx.Limit = &limit
+	return _q
+}
+
+// Offset to start from.
+func (_q *PromoCodeQuery) Offset(offset int) *PromoCodeQuery {
+	_q.ctx.Offset = &offset
+	return _q
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (_q *PromoCodeQuery) Unique(unique bool) *PromoCodeQuery {
+	_q.ctx.Unique = &unique
+	return _q
+}
+
+// Order specifies how the records should be ordered.
+func (_q *PromoCodeQuery) Order(o ...promocode.OrderOption) *PromoCodeQuery {
+	_q.order = append(_q.order, o...)
+	return _q
+}
+
+// QueryUsageRecords chains the current query on the "usage_records" edge.
+func (_q *PromoCodeQuery) QueryUsageRecords() *PromoCodeUsageQuery {
+	query := (&PromoCodeUsageClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocode.Table, promocode.FieldID, selector),
+			sqlgraph.To(promocodeusage.Table, promocodeusage.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, promocode.UsageRecordsTable, promocode.UsageRecordsColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first PromoCode entity from the query.
+// Returns a *NotFoundError when no PromoCode was found.
+func (_q *PromoCodeQuery) First(ctx context.Context) (*PromoCode, error) {
+	nodes, err := _q.Limit(1).All(setContextOp(ctx, _q.ctx, ent.OpQueryFirst))
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{promocode.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (_q *PromoCodeQuery) FirstX(ctx context.Context) *PromoCode {
+	node, err := _q.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first PromoCode ID from the query.
+// Returns a *NotFoundError when no PromoCode ID was found.
+func (_q *PromoCodeQuery) FirstID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(1).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryFirstID)); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{promocode.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (_q *PromoCodeQuery) FirstIDX(ctx context.Context) int64 {
+	id, err := _q.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single PromoCode entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one PromoCode entity is found.
+// Returns a *NotFoundError when no PromoCode entities are found.
+func (_q *PromoCodeQuery) Only(ctx context.Context) (*PromoCode, error) {
+	nodes, err := _q.Limit(2).All(setContextOp(ctx, _q.ctx, ent.OpQueryOnly))
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{promocode.Label}
+	default:
+		return nil, &NotSingularError{promocode.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (_q *PromoCodeQuery) OnlyX(ctx context.Context) *PromoCode {
+	node, err := _q.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only PromoCode ID in the query.
+// Returns a *NotSingularError when more than one PromoCode ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (_q *PromoCodeQuery) OnlyID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(2).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryOnlyID)); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{promocode.Label}
+	default:
+		err = &NotSingularError{promocode.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (_q *PromoCodeQuery) OnlyIDX(ctx context.Context) int64 {
+	id, err := _q.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of PromoCodes.
+func (_q *PromoCodeQuery) All(ctx context.Context) ([]*PromoCode, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryAll)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*PromoCode, *PromoCodeQuery]()
+	return withInterceptors[[]*PromoCode](ctx, _q, qr, _q.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (_q *PromoCodeQuery) AllX(ctx context.Context) []*PromoCode {
+	nodes, err := _q.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of PromoCode IDs.
+func (_q *PromoCodeQuery) IDs(ctx context.Context) (ids []int64, err error) {
+	if _q.ctx.Unique == nil && _q.path != nil {
+		_q.Unique(true)
+	}
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryIDs)
+	if err = _q.Select(promocode.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (_q *PromoCodeQuery) IDsX(ctx context.Context) []int64 {
+	ids, err := _q.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (_q *PromoCodeQuery) Count(ctx context.Context) (int, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryCount)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return withInterceptors[int](ctx, _q, querierCount[*PromoCodeQuery](), _q.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (_q *PromoCodeQuery) CountX(ctx context.Context) int {
+	count, err := _q.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (_q *PromoCodeQuery) Exist(ctx context.Context) (bool, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryExist)
+	switch _, err := _q.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (_q *PromoCodeQuery) ExistX(ctx context.Context) bool {
+	exist, err := _q.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the PromoCodeQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (_q *PromoCodeQuery) Clone() *PromoCodeQuery {
+	if _q == nil {
+		return nil
+	}
+	return &PromoCodeQuery{
+		config:           _q.config,
+		ctx:              _q.ctx.Clone(),
+		order:            append([]promocode.OrderOption{}, _q.order...),
+		inters:           append([]Interceptor{}, _q.inters...),
+		predicates:       append([]predicate.PromoCode{}, _q.predicates...),
+		withUsageRecords: _q.withUsageRecords.Clone(),
+		// clone intermediate query.
+		sql:  _q.sql.Clone(),
+		path: _q.path,
+	}
+}
+
+// WithUsageRecords tells the query-builder to eager-load the nodes that are connected to
+// the "usage_records" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *PromoCodeQuery) WithUsageRecords(opts ...func(*PromoCodeUsageQuery)) *PromoCodeQuery {
+	query := (&PromoCodeUsageClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withUsageRecords = query
+	return _q
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		Code string `json:"code,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.PromoCode.Query().
+//		GroupBy(promocode.FieldCode).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (_q *PromoCodeQuery) GroupBy(field string, fields ...string) *PromoCodeGroupBy {
+	_q.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &PromoCodeGroupBy{build: _q}
+	grbuild.flds = &_q.ctx.Fields
+	grbuild.label = promocode.Label
+	grbuild.scan = grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		Code string `json:"code,omitempty"`
+//	}
+//
+//	client.PromoCode.Query().
+//		Select(promocode.FieldCode).
+//		Scan(ctx, &v)
+func (_q *PromoCodeQuery) Select(fields ...string) *PromoCodeSelect {
+	_q.ctx.Fields = append(_q.ctx.Fields, fields...)
+	sbuild := &PromoCodeSelect{PromoCodeQuery: _q}
+	sbuild.label = promocode.Label
+	sbuild.flds, sbuild.scan = &_q.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a PromoCodeSelect configured with the given aggregations.
+func (_q *PromoCodeQuery) Aggregate(fns ...AggregateFunc) *PromoCodeSelect {
+	return _q.Select().Aggregate(fns...)
+}
+
+func (_q *PromoCodeQuery) prepareQuery(ctx context.Context) error {
+	for _, inter := range _q.inters {
+		if inter == nil {
+			return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)")
+		}
+		if trv, ok := inter.(Traverser); ok {
+			if err := trv.Traverse(ctx, _q); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range _q.ctx.Fields {
+		if !promocode.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if _q.path != nil {
+		prev, err := _q.path(ctx)
+		if err != nil {
+			return err
+		}
+		_q.sql = prev
+	}
+	return nil
+}
+
+func (_q *PromoCodeQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*PromoCode, error) {
+	var (
+		nodes       = []*PromoCode{}
+		_spec       = _q.querySpec()
+		loadedTypes = [1]bool{
+			_q.withUsageRecords != nil,
+		}
+	)
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*PromoCode).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &PromoCode{config: _q.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, _q.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := _q.withUsageRecords; query != nil {
+		if err := _q.loadUsageRecords(ctx, query, nodes,
+			func(n *PromoCode) { n.Edges.UsageRecords = []*PromoCodeUsage{} },
+			func(n *PromoCode, e *PromoCodeUsage) { n.Edges.UsageRecords = append(n.Edges.UsageRecords, e) }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (_q *PromoCodeQuery) loadUsageRecords(ctx context.Context, query *PromoCodeUsageQuery, nodes []*PromoCode, init func(*PromoCode), assign func(*PromoCode, *PromoCodeUsage)) error {
+	fks := make([]driver.Value, 0, len(nodes))
+	nodeids := make(map[int64]*PromoCode)
+	for i := range nodes {
+		fks = append(fks, nodes[i].ID)
+		nodeids[nodes[i].ID] = nodes[i]
+		if init != nil {
+			init(nodes[i])
+		}
+	}
+	if len(query.ctx.Fields) > 0 {
+		query.ctx.AppendFieldOnce(promocodeusage.FieldPromoCodeID)
+	}
+	query.Where(predicate.PromoCodeUsage(func(s *sql.Selector) {
+		s.Where(sql.InValues(s.C(promocode.UsageRecordsColumn), fks...))
+	}))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		fk := n.PromoCodeID
+		node, ok := nodeids[fk]
+		if !ok {
+			return fmt.Errorf(`unexpected referenced foreign-key "promo_code_id" returned %v for node %v`, fk, n.ID)
+		}
+		assign(node, n)
+	}
+	return nil
+}
+
+func (_q *PromoCodeQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	_spec.Node.Columns = _q.ctx.Fields
+	if len(_q.ctx.Fields) > 0 {
+		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
+	}
+	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
+}
+
+func (_q *PromoCodeQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(promocode.Table, promocode.Columns, sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64))
+	_spec.From = _q.sql
+	if unique := _q.ctx.Unique; unique != nil {
+		_spec.Unique = *unique
+	} else if _q.path != nil {
+		_spec.Unique = true
+	}
+	if fields := _q.ctx.Fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocode.FieldID)
+		for i := range fields {
+			if fields[i] != promocode.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+	}
+	if ps := _q.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := _q.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (_q *PromoCodeQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(_q.driver.Dialect())
+	t1 := builder.Table(promocode.Table)
+	columns := _q.ctx.Fields
+	if len(columns) == 0 {
+		columns = promocode.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if _q.sql != nil {
+		selector = _q.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if _q.ctx.Unique != nil && *_q.ctx.Unique {
+		selector.Distinct()
+	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
+	for _, p := range _q.predicates {
+		p(selector)
+	}
+	for _, p := range _q.order {
+		p(selector)
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *PromoCodeQuery) ForUpdate(opts ...sql.LockOption) *PromoCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *PromoCodeQuery) ForShare(opts ...sql.LockOption) *PromoCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
+// PromoCodeGroupBy is the group-by builder for PromoCode entities.
+type PromoCodeGroupBy struct {
+	selector
+	build *PromoCodeQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (_g *PromoCodeGroupBy) Aggregate(fns ...AggregateFunc) *PromoCodeGroupBy {
+	_g.fns = append(_g.fns, fns...)
+	return _g
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_g *PromoCodeGroupBy) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _g.build.ctx, ent.OpQueryGroupBy)
+	if err := _g.build.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeQuery, *PromoCodeGroupBy](ctx, _g.build, _g, _g.build.inters, v)
+}
+
+func (_g *PromoCodeGroupBy) sqlScan(ctx context.Context, root *PromoCodeQuery, v any) error {
+	selector := root.sqlQuery(ctx).Select()
+	aggregation := make([]string, 0, len(_g.fns))
+	for _, fn := range _g.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(*_g.flds)+len(_g.fns))
+		for _, f := range *_g.flds {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	selector.GroupBy(selector.Columns(*_g.flds...)...)
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _g.build.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+// PromoCodeSelect is the builder for selecting fields of PromoCode entities.
+type PromoCodeSelect struct {
+	*PromoCodeQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (_s *PromoCodeSelect) Aggregate(fns ...AggregateFunc) *PromoCodeSelect {
+	_s.fns = append(_s.fns, fns...)
+	return _s
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_s *PromoCodeSelect) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _s.ctx, ent.OpQuerySelect)
+	if err := _s.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeQuery, *PromoCodeSelect](ctx, _s.PromoCodeQuery, _s, _s.inters, v)
+}
+
+func (_s *PromoCodeSelect) sqlScan(ctx context.Context, root *PromoCodeQuery, v any) error {
+	selector := root.sqlQuery(ctx)
+	aggregation := make([]string, 0, len(_s.fns))
+	for _, fn := range _s.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	switch n := len(*_s.selector.flds); {
+	case n == 0 && len(aggregation) > 0:
+		selector.Select(aggregation...)
+	case n != 0 && len(aggregation) > 0:
+		selector.AppendSelect(aggregation...)
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _s.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}

backend/ent/promocode_update.go

@@ -0,0 +1,745 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+)
+
+// PromoCodeUpdate is the builder for updating PromoCode entities.
+type PromoCodeUpdate struct {
+	config
+	hooks    []Hook
+	mutation *PromoCodeMutation
+}
+
+// Where appends a list predicates to the PromoCodeUpdate builder.
+func (_u *PromoCodeUpdate) Where(ps ...predicate.PromoCode) *PromoCodeUpdate {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// SetCode sets the "code" field.
+func (_u *PromoCodeUpdate) SetCode(v string) *PromoCodeUpdate {
+	_u.mutation.SetCode(v)
+	return _u
+}
+
+// SetNillableCode sets the "code" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableCode(v *string) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetCode(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUpdate) SetBonusAmount(v float64) *PromoCodeUpdate {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableBonusAmount(v *float64) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUpdate) AddBonusAmount(v float64) *PromoCodeUpdate {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetMaxUses sets the "max_uses" field.
+func (_u *PromoCodeUpdate) SetMaxUses(v int) *PromoCodeUpdate {
+	_u.mutation.ResetMaxUses()
+	_u.mutation.SetMaxUses(v)
+	return _u
+}
+
+// SetNillableMaxUses sets the "max_uses" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableMaxUses(v *int) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetMaxUses(*v)
+	}
+	return _u
+}
+
+// AddMaxUses adds value to the "max_uses" field.
+func (_u *PromoCodeUpdate) AddMaxUses(v int) *PromoCodeUpdate {
+	_u.mutation.AddMaxUses(v)
+	return _u
+}
+
+// SetUsedCount sets the "used_count" field.
+func (_u *PromoCodeUpdate) SetUsedCount(v int) *PromoCodeUpdate {
+	_u.mutation.ResetUsedCount()
+	_u.mutation.SetUsedCount(v)
+	return _u
+}
+
+// SetNillableUsedCount sets the "used_count" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableUsedCount(v *int) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetUsedCount(*v)
+	}
+	return _u
+}
+
+// AddUsedCount adds value to the "used_count" field.
+func (_u *PromoCodeUpdate) AddUsedCount(v int) *PromoCodeUpdate {
+	_u.mutation.AddUsedCount(v)
+	return _u
+}
+
+// SetStatus sets the "status" field.
+func (_u *PromoCodeUpdate) SetStatus(v string) *PromoCodeUpdate {
+	_u.mutation.SetStatus(v)
+	return _u
+}
+
+// SetNillableStatus sets the "status" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableStatus(v *string) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetStatus(*v)
+	}
+	return _u
+}
+
+// SetExpiresAt sets the "expires_at" field.
+func (_u *PromoCodeUpdate) SetExpiresAt(v time.Time) *PromoCodeUpdate {
+	_u.mutation.SetExpiresAt(v)
+	return _u
+}
+
+// SetNillableExpiresAt sets the "expires_at" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableExpiresAt(v *time.Time) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetExpiresAt(*v)
+	}
+	return _u
+}
+
+// ClearExpiresAt clears the value of the "expires_at" field.
+func (_u *PromoCodeUpdate) ClearExpiresAt() *PromoCodeUpdate {
+	_u.mutation.ClearExpiresAt()
+	return _u
+}
+
+// SetNotes sets the "notes" field.
+func (_u *PromoCodeUpdate) SetNotes(v string) *PromoCodeUpdate {
+	_u.mutation.SetNotes(v)
+	return _u
+}
+
+// SetNillableNotes sets the "notes" field if the given value is not nil.
+func (_u *PromoCodeUpdate) SetNillableNotes(v *string) *PromoCodeUpdate {
+	if v != nil {
+		_u.SetNotes(*v)
+	}
+	return _u
+}
+
+// ClearNotes clears the value of the "notes" field.
+func (_u *PromoCodeUpdate) ClearNotes() *PromoCodeUpdate {
+	_u.mutation.ClearNotes()
+	return _u
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (_u *PromoCodeUpdate) SetUpdatedAt(v time.Time) *PromoCodeUpdate {
+	_u.mutation.SetUpdatedAt(v)
+	return _u
+}
+
+// AddUsageRecordIDs adds the "usage_records" edge to the PromoCodeUsage entity by IDs.
+func (_u *PromoCodeUpdate) AddUsageRecordIDs(ids ...int64) *PromoCodeUpdate {
+	_u.mutation.AddUsageRecordIDs(ids...)
+	return _u
+}
+
+// AddUsageRecords adds the "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdate) AddUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdate {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddUsageRecordIDs(ids...)
+}
+
+// Mutation returns the PromoCodeMutation object of the builder.
+func (_u *PromoCodeUpdate) Mutation() *PromoCodeMutation {
+	return _u.mutation
+}
+
+// ClearUsageRecords clears all "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdate) ClearUsageRecords() *PromoCodeUpdate {
+	_u.mutation.ClearUsageRecords()
+	return _u
+}
+
+// RemoveUsageRecordIDs removes the "usage_records" edge to PromoCodeUsage entities by IDs.
+func (_u *PromoCodeUpdate) RemoveUsageRecordIDs(ids ...int64) *PromoCodeUpdate {
+	_u.mutation.RemoveUsageRecordIDs(ids...)
+	return _u
+}
+
+// RemoveUsageRecords removes "usage_records" edges to PromoCodeUsage entities.
+func (_u *PromoCodeUpdate) RemoveUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdate {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveUsageRecordIDs(ids...)
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (_u *PromoCodeUpdate) Save(ctx context.Context) (int, error) {
+	_u.defaults()
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUpdate) SaveX(ctx context.Context) int {
+	affected, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (_u *PromoCodeUpdate) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUpdate) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_u *PromoCodeUpdate) defaults() {
+	if _, ok := _u.mutation.UpdatedAt(); !ok {
+		v := promocode.UpdateDefaultUpdatedAt()
+		_u.mutation.SetUpdatedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUpdate) check() error {
+	if v, ok := _u.mutation.Code(); ok {
+		if err := promocode.CodeValidator(v); err != nil {
+			return &ValidationError{Name: "code", err: fmt.Errorf(`ent: validator failed for field "PromoCode.code": %w`, err)}
+		}
+	}
+	if v, ok := _u.mutation.Status(); ok {
+		if err := promocode.StatusValidator(v); err != nil {
+			return &ValidationError{Name: "status", err: fmt.Errorf(`ent: validator failed for field "PromoCode.status": %w`, err)}
+		}
+	}
+	return nil
+}
+
+func (_u *PromoCodeUpdate) sqlSave(ctx context.Context) (_node int, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocode.Table, promocode.Columns, sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64))
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Code(); ok {
+		_spec.SetField(promocode.FieldCode, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.MaxUses(); ok {
+		_spec.SetField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedMaxUses(); ok {
+		_spec.AddField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.UsedCount(); ok {
+		_spec.SetField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedUsedCount(); ok {
+		_spec.AddField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.Status(); ok {
+		_spec.SetField(promocode.FieldStatus, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.ExpiresAt(); ok {
+		_spec.SetField(promocode.FieldExpiresAt, field.TypeTime, value)
+	}
+	if _u.mutation.ExpiresAtCleared() {
+		_spec.ClearField(promocode.FieldExpiresAt, field.TypeTime)
+	}
+	if value, ok := _u.mutation.Notes(); ok {
+		_spec.SetField(promocode.FieldNotes, field.TypeString, value)
+	}
+	if _u.mutation.NotesCleared() {
+		_spec.ClearField(promocode.FieldNotes, field.TypeString)
+	}
+	if value, ok := _u.mutation.UpdatedAt(); ok {
+		_spec.SetField(promocode.FieldUpdatedAt, field.TypeTime, value)
+	}
+	if _u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedUsageRecordsIDs(); len(nodes) > 0 && !_u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UsageRecordsIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocode.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}
+
+// PromoCodeUpdateOne is the builder for updating a single PromoCode entity.
+type PromoCodeUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *PromoCodeMutation
+}
+
+// SetCode sets the "code" field.
+func (_u *PromoCodeUpdateOne) SetCode(v string) *PromoCodeUpdateOne {
+	_u.mutation.SetCode(v)
+	return _u
+}
+
+// SetNillableCode sets the "code" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableCode(v *string) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetCode(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUpdateOne) SetBonusAmount(v float64) *PromoCodeUpdateOne {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableBonusAmount(v *float64) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUpdateOne) AddBonusAmount(v float64) *PromoCodeUpdateOne {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetMaxUses sets the "max_uses" field.
+func (_u *PromoCodeUpdateOne) SetMaxUses(v int) *PromoCodeUpdateOne {
+	_u.mutation.ResetMaxUses()
+	_u.mutation.SetMaxUses(v)
+	return _u
+}
+
+// SetNillableMaxUses sets the "max_uses" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableMaxUses(v *int) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetMaxUses(*v)
+	}
+	return _u
+}
+
+// AddMaxUses adds value to the "max_uses" field.
+func (_u *PromoCodeUpdateOne) AddMaxUses(v int) *PromoCodeUpdateOne {
+	_u.mutation.AddMaxUses(v)
+	return _u
+}
+
+// SetUsedCount sets the "used_count" field.
+func (_u *PromoCodeUpdateOne) SetUsedCount(v int) *PromoCodeUpdateOne {
+	_u.mutation.ResetUsedCount()
+	_u.mutation.SetUsedCount(v)
+	return _u
+}
+
+// SetNillableUsedCount sets the "used_count" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableUsedCount(v *int) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetUsedCount(*v)
+	}
+	return _u
+}
+
+// AddUsedCount adds value to the "used_count" field.
+func (_u *PromoCodeUpdateOne) AddUsedCount(v int) *PromoCodeUpdateOne {
+	_u.mutation.AddUsedCount(v)
+	return _u
+}
+
+// SetStatus sets the "status" field.
+func (_u *PromoCodeUpdateOne) SetStatus(v string) *PromoCodeUpdateOne {
+	_u.mutation.SetStatus(v)
+	return _u
+}
+
+// SetNillableStatus sets the "status" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableStatus(v *string) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetStatus(*v)
+	}
+	return _u
+}
+
+// SetExpiresAt sets the "expires_at" field.
+func (_u *PromoCodeUpdateOne) SetExpiresAt(v time.Time) *PromoCodeUpdateOne {
+	_u.mutation.SetExpiresAt(v)
+	return _u
+}
+
+// SetNillableExpiresAt sets the "expires_at" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableExpiresAt(v *time.Time) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetExpiresAt(*v)
+	}
+	return _u
+}
+
+// ClearExpiresAt clears the value of the "expires_at" field.
+func (_u *PromoCodeUpdateOne) ClearExpiresAt() *PromoCodeUpdateOne {
+	_u.mutation.ClearExpiresAt()
+	return _u
+}
+
+// SetNotes sets the "notes" field.
+func (_u *PromoCodeUpdateOne) SetNotes(v string) *PromoCodeUpdateOne {
+	_u.mutation.SetNotes(v)
+	return _u
+}
+
+// SetNillableNotes sets the "notes" field if the given value is not nil.
+func (_u *PromoCodeUpdateOne) SetNillableNotes(v *string) *PromoCodeUpdateOne {
+	if v != nil {
+		_u.SetNotes(*v)
+	}
+	return _u
+}
+
+// ClearNotes clears the value of the "notes" field.
+func (_u *PromoCodeUpdateOne) ClearNotes() *PromoCodeUpdateOne {
+	_u.mutation.ClearNotes()
+	return _u
+}
+
+// SetUpdatedAt sets the "updated_at" field.
+func (_u *PromoCodeUpdateOne) SetUpdatedAt(v time.Time) *PromoCodeUpdateOne {
+	_u.mutation.SetUpdatedAt(v)
+	return _u
+}
+
+// AddUsageRecordIDs adds the "usage_records" edge to the PromoCodeUsage entity by IDs.
+func (_u *PromoCodeUpdateOne) AddUsageRecordIDs(ids ...int64) *PromoCodeUpdateOne {
+	_u.mutation.AddUsageRecordIDs(ids...)
+	return _u
+}
+
+// AddUsageRecords adds the "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdateOne) AddUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdateOne {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddUsageRecordIDs(ids...)
+}
+
+// Mutation returns the PromoCodeMutation object of the builder.
+func (_u *PromoCodeUpdateOne) Mutation() *PromoCodeMutation {
+	return _u.mutation
+}
+
+// ClearUsageRecords clears all "usage_records" edges to the PromoCodeUsage entity.
+func (_u *PromoCodeUpdateOne) ClearUsageRecords() *PromoCodeUpdateOne {
+	_u.mutation.ClearUsageRecords()
+	return _u
+}
+
+// RemoveUsageRecordIDs removes the "usage_records" edge to PromoCodeUsage entities by IDs.
+func (_u *PromoCodeUpdateOne) RemoveUsageRecordIDs(ids ...int64) *PromoCodeUpdateOne {
+	_u.mutation.RemoveUsageRecordIDs(ids...)
+	return _u
+}
+
+// RemoveUsageRecords removes "usage_records" edges to PromoCodeUsage entities.
+func (_u *PromoCodeUpdateOne) RemoveUsageRecords(v ...*PromoCodeUsage) *PromoCodeUpdateOne {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemoveUsageRecordIDs(ids...)
+}
+
+// Where appends a list predicates to the PromoCodeUpdate builder.
+func (_u *PromoCodeUpdateOne) Where(ps ...predicate.PromoCode) *PromoCodeUpdateOne {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// Select allows selecting one or more fields (columns) of the returned entity.
+// The default is selecting all fields defined in the entity schema.
+func (_u *PromoCodeUpdateOne) Select(field string, fields ...string) *PromoCodeUpdateOne {
+	_u.fields = append([]string{field}, fields...)
+	return _u
+}
+
+// Save executes the query and returns the updated PromoCode entity.
+func (_u *PromoCodeUpdateOne) Save(ctx context.Context) (*PromoCode, error) {
+	_u.defaults()
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUpdateOne) SaveX(ctx context.Context) *PromoCode {
+	node, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (_u *PromoCodeUpdateOne) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUpdateOne) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_u *PromoCodeUpdateOne) defaults() {
+	if _, ok := _u.mutation.UpdatedAt(); !ok {
+		v := promocode.UpdateDefaultUpdatedAt()
+		_u.mutation.SetUpdatedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUpdateOne) check() error {
+	if v, ok := _u.mutation.Code(); ok {
+		if err := promocode.CodeValidator(v); err != nil {
+			return &ValidationError{Name: "code", err: fmt.Errorf(`ent: validator failed for field "PromoCode.code": %w`, err)}
+		}
+	}
+	if v, ok := _u.mutation.Status(); ok {
+		if err := promocode.StatusValidator(v); err != nil {
+			return &ValidationError{Name: "status", err: fmt.Errorf(`ent: validator failed for field "PromoCode.status": %w`, err)}
+		}
+	}
+	return nil
+}
+
+func (_u *PromoCodeUpdateOne) sqlSave(ctx context.Context) (_node *PromoCode, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocode.Table, promocode.Columns, sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64))
+	id, ok := _u.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "PromoCode.id" for update`)}
+	}
+	_spec.Node.ID.Value = id
+	if fields := _u.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocode.FieldID)
+		for _, f := range fields {
+			if !promocode.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != promocode.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, f)
+			}
+		}
+	}
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.Code(); ok {
+		_spec.SetField(promocode.FieldCode, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocode.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.MaxUses(); ok {
+		_spec.SetField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedMaxUses(); ok {
+		_spec.AddField(promocode.FieldMaxUses, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.UsedCount(); ok {
+		_spec.SetField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.AddedUsedCount(); ok {
+		_spec.AddField(promocode.FieldUsedCount, field.TypeInt, value)
+	}
+	if value, ok := _u.mutation.Status(); ok {
+		_spec.SetField(promocode.FieldStatus, field.TypeString, value)
+	}
+	if value, ok := _u.mutation.ExpiresAt(); ok {
+		_spec.SetField(promocode.FieldExpiresAt, field.TypeTime, value)
+	}
+	if _u.mutation.ExpiresAtCleared() {
+		_spec.ClearField(promocode.FieldExpiresAt, field.TypeTime)
+	}
+	if value, ok := _u.mutation.Notes(); ok {
+		_spec.SetField(promocode.FieldNotes, field.TypeString, value)
+	}
+	if _u.mutation.NotesCleared() {
+		_spec.ClearField(promocode.FieldNotes, field.TypeString)
+	}
+	if value, ok := _u.mutation.UpdatedAt(); ok {
+		_spec.SetField(promocode.FieldUpdatedAt, field.TypeTime, value)
+	}
+	if _u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedUsageRecordsIDs(); len(nodes) > 0 && !_u.mutation.UsageRecordsCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UsageRecordsIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   promocode.UsageRecordsTable,
+			Columns: []string{promocode.UsageRecordsColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &PromoCode{config: _u.config}
+	_spec.Assign = _node.assignValues
+	_spec.ScanValues = _node.scanValues
+	if err = sqlgraph.UpdateNode(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocode.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}

backend/ent/promocodeusage.go

@@ -0,0 +1,187 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"fmt"
+	"strings"
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect/sql"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsage is the model entity for the PromoCodeUsage schema.
+type PromoCodeUsage struct {
+	config `json:"-"`
+	// ID of the ent.
+	ID int64 `json:"id,omitempty"`
+	// 优惠码ID
+	PromoCodeID int64 `json:"promo_code_id,omitempty"`
+	// 使用用户ID
+	UserID int64 `json:"user_id,omitempty"`
+	// 实际赠送金额
+	BonusAmount float64 `json:"bonus_amount,omitempty"`
+	// 使用时间
+	UsedAt time.Time `json:"used_at,omitempty"`
+	// Edges holds the relations/edges for other nodes in the graph.
+	// The values are being populated by the PromoCodeUsageQuery when eager-loading is set.
+	Edges        PromoCodeUsageEdges `json:"edges"`
+	selectValues sql.SelectValues
+}
+
+// PromoCodeUsageEdges holds the relations/edges for other nodes in the graph.
+type PromoCodeUsageEdges struct {
+	// PromoCode holds the value of the promo_code edge.
+	PromoCode *PromoCode `json:"promo_code,omitempty"`
+	// User holds the value of the user edge.
+	User *User `json:"user,omitempty"`
+	// loadedTypes holds the information for reporting if a
+	// type was loaded (or requested) in eager-loading or not.
+	loadedTypes [2]bool
+}
+
+// PromoCodeOrErr returns the PromoCode value or an error if the edge
+// was not loaded in eager-loading, or loaded but was not found.
+func (e PromoCodeUsageEdges) PromoCodeOrErr() (*PromoCode, error) {
+	if e.PromoCode != nil {
+		return e.PromoCode, nil
+	} else if e.loadedTypes[0] {
+		return nil, &NotFoundError{label: promocode.Label}
+	}
+	return nil, &NotLoadedError{edge: "promo_code"}
+}
+
+// UserOrErr returns the User value or an error if the edge
+// was not loaded in eager-loading, or loaded but was not found.
+func (e PromoCodeUsageEdges) UserOrErr() (*User, error) {
+	if e.User != nil {
+		return e.User, nil
+	} else if e.loadedTypes[1] {
+		return nil, &NotFoundError{label: user.Label}
+	}
+	return nil, &NotLoadedError{edge: "user"}
+}
+
+// scanValues returns the types for scanning values from sql.Rows.
+func (*PromoCodeUsage) scanValues(columns []string) ([]any, error) {
+	values := make([]any, len(columns))
+	for i := range columns {
+		switch columns[i] {
+		case promocodeusage.FieldBonusAmount:
+			values[i] = new(sql.NullFloat64)
+		case promocodeusage.FieldID, promocodeusage.FieldPromoCodeID, promocodeusage.FieldUserID:
+			values[i] = new(sql.NullInt64)
+		case promocodeusage.FieldUsedAt:
+			values[i] = new(sql.NullTime)
+		default:
+			values[i] = new(sql.UnknownType)
+		}
+	}
+	return values, nil
+}
+
+// assignValues assigns the values that were returned from sql.Rows (after scanning)
+// to the PromoCodeUsage fields.
+func (_m *PromoCodeUsage) assignValues(columns []string, values []any) error {
+	if m, n := len(values), len(columns); m < n {
+		return fmt.Errorf("mismatch number of scan values: %d != %d", m, n)
+	}
+	for i := range columns {
+		switch columns[i] {
+		case promocodeusage.FieldID:
+			value, ok := values[i].(*sql.NullInt64)
+			if !ok {
+				return fmt.Errorf("unexpected type %T for field id", value)
+			}
+			_m.ID = int64(value.Int64)
+		case promocodeusage.FieldPromoCodeID:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for field promo_code_id", values[i])
+			} else if value.Valid {
+				_m.PromoCodeID = value.Int64
+			}
+		case promocodeusage.FieldUserID:
+			if value, ok := values[i].(*sql.NullInt64); !ok {
+				return fmt.Errorf("unexpected type %T for field user_id", values[i])
+			} else if value.Valid {
+				_m.UserID = value.Int64
+			}
+		case promocodeusage.FieldBonusAmount:
+			if value, ok := values[i].(*sql.NullFloat64); !ok {
+				return fmt.Errorf("unexpected type %T for field bonus_amount", values[i])
+			} else if value.Valid {
+				_m.BonusAmount = value.Float64
+			}
+		case promocodeusage.FieldUsedAt:
+			if value, ok := values[i].(*sql.NullTime); !ok {
+				return fmt.Errorf("unexpected type %T for field used_at", values[i])
+			} else if value.Valid {
+				_m.UsedAt = value.Time
+			}
+		default:
+			_m.selectValues.Set(columns[i], values[i])
+		}
+	}
+	return nil
+}
+
+// Value returns the ent.Value that was dynamically selected and assigned to the PromoCodeUsage.
+// This includes values selected through modifiers, order, etc.
+func (_m *PromoCodeUsage) Value(name string) (ent.Value, error) {
+	return _m.selectValues.Get(name)
+}
+
+// QueryPromoCode queries the "promo_code" edge of the PromoCodeUsage entity.
+func (_m *PromoCodeUsage) QueryPromoCode() *PromoCodeQuery {
+	return NewPromoCodeUsageClient(_m.config).QueryPromoCode(_m)
+}
+
+// QueryUser queries the "user" edge of the PromoCodeUsage entity.
+func (_m *PromoCodeUsage) QueryUser() *UserQuery {
+	return NewPromoCodeUsageClient(_m.config).QueryUser(_m)
+}
+
+// Update returns a builder for updating this PromoCodeUsage.
+// Note that you need to call PromoCodeUsage.Unwrap() before calling this method if this PromoCodeUsage
+// was returned from a transaction, and the transaction was committed or rolled back.
+func (_m *PromoCodeUsage) Update() *PromoCodeUsageUpdateOne {
+	return NewPromoCodeUsageClient(_m.config).UpdateOne(_m)
+}
+
+// Unwrap unwraps the PromoCodeUsage entity that was returned from a transaction after it was closed,
+// so that all future queries will be executed through the driver which created the transaction.
+func (_m *PromoCodeUsage) Unwrap() *PromoCodeUsage {
+	_tx, ok := _m.config.driver.(*txDriver)
+	if !ok {
+		panic("ent: PromoCodeUsage is not a transactional entity")
+	}
+	_m.config.driver = _tx.drv
+	return _m
+}
+
+// String implements the fmt.Stringer.
+func (_m *PromoCodeUsage) String() string {
+	var builder strings.Builder
+	builder.WriteString("PromoCodeUsage(")
+	builder.WriteString(fmt.Sprintf("id=%v, ", _m.ID))
+	builder.WriteString("promo_code_id=")
+	builder.WriteString(fmt.Sprintf("%v", _m.PromoCodeID))
+	builder.WriteString(", ")
+	builder.WriteString("user_id=")
+	builder.WriteString(fmt.Sprintf("%v", _m.UserID))
+	builder.WriteString(", ")
+	builder.WriteString("bonus_amount=")
+	builder.WriteString(fmt.Sprintf("%v", _m.BonusAmount))
+	builder.WriteString(", ")
+	builder.WriteString("used_at=")
+	builder.WriteString(_m.UsedAt.Format(time.ANSIC))
+	builder.WriteByte(')')
+	return builder.String()
+}
+
+// PromoCodeUsages is a parsable slice of PromoCodeUsage.
+type PromoCodeUsages []*PromoCodeUsage

backend/ent/promocodeusage/promocodeusage.go

@@ -0,0 +1,125 @@
+// Code generated by ent, DO NOT EDIT.
+
+package promocodeusage
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+)
+
+const (
+	// Label holds the string label denoting the promocodeusage type in the database.
+	Label = "promo_code_usage"
+	// FieldID holds the string denoting the id field in the database.
+	FieldID = "id"
+	// FieldPromoCodeID holds the string denoting the promo_code_id field in the database.
+	FieldPromoCodeID = "promo_code_id"
+	// FieldUserID holds the string denoting the user_id field in the database.
+	FieldUserID = "user_id"
+	// FieldBonusAmount holds the string denoting the bonus_amount field in the database.
+	FieldBonusAmount = "bonus_amount"
+	// FieldUsedAt holds the string denoting the used_at field in the database.
+	FieldUsedAt = "used_at"
+	// EdgePromoCode holds the string denoting the promo_code edge name in mutations.
+	EdgePromoCode = "promo_code"
+	// EdgeUser holds the string denoting the user edge name in mutations.
+	EdgeUser = "user"
+	// Table holds the table name of the promocodeusage in the database.
+	Table = "promo_code_usages"
+	// PromoCodeTable is the table that holds the promo_code relation/edge.
+	PromoCodeTable = "promo_code_usages"
+	// PromoCodeInverseTable is the table name for the PromoCode entity.
+	// It exists in this package in order to avoid circular dependency with the "promocode" package.
+	PromoCodeInverseTable = "promo_codes"
+	// PromoCodeColumn is the table column denoting the promo_code relation/edge.
+	PromoCodeColumn = "promo_code_id"
+	// UserTable is the table that holds the user relation/edge.
+	UserTable = "promo_code_usages"
+	// UserInverseTable is the table name for the User entity.
+	// It exists in this package in order to avoid circular dependency with the "user" package.
+	UserInverseTable = "users"
+	// UserColumn is the table column denoting the user relation/edge.
+	UserColumn = "user_id"
+)
+
+// Columns holds all SQL columns for promocodeusage fields.
+var Columns = []string{
+	FieldID,
+	FieldPromoCodeID,
+	FieldUserID,
+	FieldBonusAmount,
+	FieldUsedAt,
+}
+
+// ValidColumn reports if the column name is valid (part of the table columns).
+func ValidColumn(column string) bool {
+	for i := range Columns {
+		if column == Columns[i] {
+			return true
+		}
+	}
+	return false
+}
+
+var (
+	// DefaultUsedAt holds the default value on creation for the "used_at" field.
+	DefaultUsedAt func() time.Time
+)
+
+// OrderOption defines the ordering options for the PromoCodeUsage queries.
+type OrderOption func(*sql.Selector)
+
+// ByID orders the results by the id field.
+func ByID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldID, opts...).ToFunc()
+}
+
+// ByPromoCodeID orders the results by the promo_code_id field.
+func ByPromoCodeID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldPromoCodeID, opts...).ToFunc()
+}
+
+// ByUserID orders the results by the user_id field.
+func ByUserID(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUserID, opts...).ToFunc()
+}
+
+// ByBonusAmount orders the results by the bonus_amount field.
+func ByBonusAmount(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldBonusAmount, opts...).ToFunc()
+}
+
+// ByUsedAt orders the results by the used_at field.
+func ByUsedAt(opts ...sql.OrderTermOption) OrderOption {
+	return sql.OrderByField(FieldUsedAt, opts...).ToFunc()
+}
+
+// ByPromoCodeField orders the results by promo_code field.
+func ByPromoCodeField(field string, opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newPromoCodeStep(), sql.OrderByField(field, opts...))
+	}
+}
+
+// ByUserField orders the results by user field.
+func ByUserField(field string, opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newUserStep(), sql.OrderByField(field, opts...))
+	}
+}
+func newPromoCodeStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(PromoCodeInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, true, PromoCodeTable, PromoCodeColumn),
+	)
+}
+func newUserStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(UserInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.M2O, true, UserTable, UserColumn),
+	)
+}

backend/ent/promocodeusage/where.go

@@ -0,0 +1,257 @@
+// Code generated by ent, DO NOT EDIT.
+
+package promocodeusage
+
+import (
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+)
+
+// ID filters vertices based on their ID field.
+func ID(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldID, id))
+}
+
+// IDEQ applies the EQ predicate on the ID field.
+func IDEQ(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldID, id))
+}
+
+// IDNEQ applies the NEQ predicate on the ID field.
+func IDNEQ(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldID, id))
+}
+
+// IDIn applies the In predicate on the ID field.
+func IDIn(ids ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldID, ids...))
+}
+
+// IDNotIn applies the NotIn predicate on the ID field.
+func IDNotIn(ids ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldID, ids...))
+}
+
+// IDGT applies the GT predicate on the ID field.
+func IDGT(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGT(FieldID, id))
+}
+
+// IDGTE applies the GTE predicate on the ID field.
+func IDGTE(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGTE(FieldID, id))
+}
+
+// IDLT applies the LT predicate on the ID field.
+func IDLT(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLT(FieldID, id))
+}
+
+// IDLTE applies the LTE predicate on the ID field.
+func IDLTE(id int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLTE(FieldID, id))
+}
+
+// PromoCodeID applies equality check predicate on the "promo_code_id" field. It's identical to PromoCodeIDEQ.
+func PromoCodeID(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldPromoCodeID, v))
+}
+
+// UserID applies equality check predicate on the "user_id" field. It's identical to UserIDEQ.
+func UserID(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUserID, v))
+}
+
+// BonusAmount applies equality check predicate on the "bonus_amount" field. It's identical to BonusAmountEQ.
+func BonusAmount(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldBonusAmount, v))
+}
+
+// UsedAt applies equality check predicate on the "used_at" field. It's identical to UsedAtEQ.
+func UsedAt(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUsedAt, v))
+}
+
+// PromoCodeIDEQ applies the EQ predicate on the "promo_code_id" field.
+func PromoCodeIDEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldPromoCodeID, v))
+}
+
+// PromoCodeIDNEQ applies the NEQ predicate on the "promo_code_id" field.
+func PromoCodeIDNEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldPromoCodeID, v))
+}
+
+// PromoCodeIDIn applies the In predicate on the "promo_code_id" field.
+func PromoCodeIDIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldPromoCodeID, vs...))
+}
+
+// PromoCodeIDNotIn applies the NotIn predicate on the "promo_code_id" field.
+func PromoCodeIDNotIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldPromoCodeID, vs...))
+}
+
+// UserIDEQ applies the EQ predicate on the "user_id" field.
+func UserIDEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUserID, v))
+}
+
+// UserIDNEQ applies the NEQ predicate on the "user_id" field.
+func UserIDNEQ(v int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldUserID, v))
+}
+
+// UserIDIn applies the In predicate on the "user_id" field.
+func UserIDIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldUserID, vs...))
+}
+
+// UserIDNotIn applies the NotIn predicate on the "user_id" field.
+func UserIDNotIn(vs ...int64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldUserID, vs...))
+}
+
+// BonusAmountEQ applies the EQ predicate on the "bonus_amount" field.
+func BonusAmountEQ(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldBonusAmount, v))
+}
+
+// BonusAmountNEQ applies the NEQ predicate on the "bonus_amount" field.
+func BonusAmountNEQ(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldBonusAmount, v))
+}
+
+// BonusAmountIn applies the In predicate on the "bonus_amount" field.
+func BonusAmountIn(vs ...float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldBonusAmount, vs...))
+}
+
+// BonusAmountNotIn applies the NotIn predicate on the "bonus_amount" field.
+func BonusAmountNotIn(vs ...float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldBonusAmount, vs...))
+}
+
+// BonusAmountGT applies the GT predicate on the "bonus_amount" field.
+func BonusAmountGT(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGT(FieldBonusAmount, v))
+}
+
+// BonusAmountGTE applies the GTE predicate on the "bonus_amount" field.
+func BonusAmountGTE(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGTE(FieldBonusAmount, v))
+}
+
+// BonusAmountLT applies the LT predicate on the "bonus_amount" field.
+func BonusAmountLT(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLT(FieldBonusAmount, v))
+}
+
+// BonusAmountLTE applies the LTE predicate on the "bonus_amount" field.
+func BonusAmountLTE(v float64) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLTE(FieldBonusAmount, v))
+}
+
+// UsedAtEQ applies the EQ predicate on the "used_at" field.
+func UsedAtEQ(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldEQ(FieldUsedAt, v))
+}
+
+// UsedAtNEQ applies the NEQ predicate on the "used_at" field.
+func UsedAtNEQ(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNEQ(FieldUsedAt, v))
+}
+
+// UsedAtIn applies the In predicate on the "used_at" field.
+func UsedAtIn(vs ...time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldIn(FieldUsedAt, vs...))
+}
+
+// UsedAtNotIn applies the NotIn predicate on the "used_at" field.
+func UsedAtNotIn(vs ...time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldNotIn(FieldUsedAt, vs...))
+}
+
+// UsedAtGT applies the GT predicate on the "used_at" field.
+func UsedAtGT(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGT(FieldUsedAt, v))
+}
+
+// UsedAtGTE applies the GTE predicate on the "used_at" field.
+func UsedAtGTE(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldGTE(FieldUsedAt, v))
+}
+
+// UsedAtLT applies the LT predicate on the "used_at" field.
+func UsedAtLT(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLT(FieldUsedAt, v))
+}
+
+// UsedAtLTE applies the LTE predicate on the "used_at" field.
+func UsedAtLTE(v time.Time) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.FieldLTE(FieldUsedAt, v))
+}
+
+// HasPromoCode applies the HasEdge predicate on the "promo_code" edge.
+func HasPromoCode() predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, PromoCodeTable, PromoCodeColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasPromoCodeWith applies the HasEdge predicate on the "promo_code" edge with a given conditions (other predicates).
+func HasPromoCodeWith(preds ...predicate.PromoCode) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := newPromoCodeStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// HasUser applies the HasEdge predicate on the "user" edge.
+func HasUser() predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, UserTable, UserColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasUserWith applies the HasEdge predicate on the "user" edge with a given conditions (other predicates).
+func HasUserWith(preds ...predicate.User) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(func(s *sql.Selector) {
+		step := newUserStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
+// And groups predicates with the AND operator between them.
+func And(predicates ...predicate.PromoCodeUsage) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.AndPredicates(predicates...))
+}
+
+// Or groups predicates with the OR operator between them.
+func Or(predicates ...predicate.PromoCodeUsage) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.OrPredicates(predicates...))
+}
+
+// Not applies the not operator on the given predicate.
+func Not(p predicate.PromoCodeUsage) predicate.PromoCodeUsage {
+	return predicate.PromoCodeUsage(sql.NotPredicates(p))
+}

backend/ent/promocodeusage_create.go

@@ -0,0 +1,696 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsageCreate is the builder for creating a PromoCodeUsage entity.
+type PromoCodeUsageCreate struct {
+	config
+	mutation *PromoCodeUsageMutation
+	hooks    []Hook
+	conflict []sql.ConflictOption
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (_c *PromoCodeUsageCreate) SetPromoCodeID(v int64) *PromoCodeUsageCreate {
+	_c.mutation.SetPromoCodeID(v)
+	return _c
+}
+
+// SetUserID sets the "user_id" field.
+func (_c *PromoCodeUsageCreate) SetUserID(v int64) *PromoCodeUsageCreate {
+	_c.mutation.SetUserID(v)
+	return _c
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_c *PromoCodeUsageCreate) SetBonusAmount(v float64) *PromoCodeUsageCreate {
+	_c.mutation.SetBonusAmount(v)
+	return _c
+}
+
+// SetUsedAt sets the "used_at" field.
+func (_c *PromoCodeUsageCreate) SetUsedAt(v time.Time) *PromoCodeUsageCreate {
+	_c.mutation.SetUsedAt(v)
+	return _c
+}
+
+// SetNillableUsedAt sets the "used_at" field if the given value is not nil.
+func (_c *PromoCodeUsageCreate) SetNillableUsedAt(v *time.Time) *PromoCodeUsageCreate {
+	if v != nil {
+		_c.SetUsedAt(*v)
+	}
+	return _c
+}
+
+// SetPromoCode sets the "promo_code" edge to the PromoCode entity.
+func (_c *PromoCodeUsageCreate) SetPromoCode(v *PromoCode) *PromoCodeUsageCreate {
+	return _c.SetPromoCodeID(v.ID)
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_c *PromoCodeUsageCreate) SetUser(v *User) *PromoCodeUsageCreate {
+	return _c.SetUserID(v.ID)
+}
+
+// Mutation returns the PromoCodeUsageMutation object of the builder.
+func (_c *PromoCodeUsageCreate) Mutation() *PromoCodeUsageMutation {
+	return _c.mutation
+}
+
+// Save creates the PromoCodeUsage in the database.
+func (_c *PromoCodeUsageCreate) Save(ctx context.Context) (*PromoCodeUsage, error) {
+	_c.defaults()
+	return withHooks(ctx, _c.sqlSave, _c.mutation, _c.hooks)
+}
+
+// SaveX calls Save and panics if Save returns an error.
+func (_c *PromoCodeUsageCreate) SaveX(ctx context.Context) *PromoCodeUsage {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *PromoCodeUsageCreate) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *PromoCodeUsageCreate) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// defaults sets the default values of the builder before save.
+func (_c *PromoCodeUsageCreate) defaults() {
+	if _, ok := _c.mutation.UsedAt(); !ok {
+		v := promocodeusage.DefaultUsedAt()
+		_c.mutation.SetUsedAt(v)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_c *PromoCodeUsageCreate) check() error {
+	if _, ok := _c.mutation.PromoCodeID(); !ok {
+		return &ValidationError{Name: "promo_code_id", err: errors.New(`ent: missing required field "PromoCodeUsage.promo_code_id"`)}
+	}
+	if _, ok := _c.mutation.UserID(); !ok {
+		return &ValidationError{Name: "user_id", err: errors.New(`ent: missing required field "PromoCodeUsage.user_id"`)}
+	}
+	if _, ok := _c.mutation.BonusAmount(); !ok {
+		return &ValidationError{Name: "bonus_amount", err: errors.New(`ent: missing required field "PromoCodeUsage.bonus_amount"`)}
+	}
+	if _, ok := _c.mutation.UsedAt(); !ok {
+		return &ValidationError{Name: "used_at", err: errors.New(`ent: missing required field "PromoCodeUsage.used_at"`)}
+	}
+	if len(_c.mutation.PromoCodeIDs()) == 0 {
+		return &ValidationError{Name: "promo_code", err: errors.New(`ent: missing required edge "PromoCodeUsage.promo_code"`)}
+	}
+	if len(_c.mutation.UserIDs()) == 0 {
+		return &ValidationError{Name: "user", err: errors.New(`ent: missing required edge "PromoCodeUsage.user"`)}
+	}
+	return nil
+}
+
+func (_c *PromoCodeUsageCreate) sqlSave(ctx context.Context) (*PromoCodeUsage, error) {
+	if err := _c.check(); err != nil {
+		return nil, err
+	}
+	_node, _spec := _c.createSpec()
+	if err := sqlgraph.CreateNode(ctx, _c.driver, _spec); err != nil {
+		if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	id := _spec.ID.Value.(int64)
+	_node.ID = int64(id)
+	_c.mutation.id = &_node.ID
+	_c.mutation.done = true
+	return _node, nil
+}
+
+func (_c *PromoCodeUsageCreate) createSpec() (*PromoCodeUsage, *sqlgraph.CreateSpec) {
+	var (
+		_node = &PromoCodeUsage{config: _c.config}
+		_spec = sqlgraph.NewCreateSpec(promocodeusage.Table, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	)
+	_spec.OnConflict = _c.conflict
+	if value, ok := _c.mutation.BonusAmount(); ok {
+		_spec.SetField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+		_node.BonusAmount = value
+	}
+	if value, ok := _c.mutation.UsedAt(); ok {
+		_spec.SetField(promocodeusage.FieldUsedAt, field.TypeTime, value)
+		_node.UsedAt = value
+	}
+	if nodes := _c.mutation.PromoCodeIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_node.PromoCodeID = nodes[0]
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	if nodes := _c.mutation.UserIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_node.UserID = nodes[0]
+		_spec.Edges = append(_spec.Edges, edge)
+	}
+	return _node, _spec
+}
+
+// OnConflict allows configuring the `ON CONFLICT` / `ON DUPLICATE KEY` clause
+// of the `INSERT` statement. For example:
+//
+//	client.PromoCodeUsage.Create().
+//		SetPromoCodeID(v).
+//		OnConflict(
+//			// Update the row with the new values
+//			// the was proposed for insertion.
+//			sql.ResolveWithNewValues(),
+//		).
+//		// Override some of the fields with custom
+//		// update values.
+//		Update(func(u *ent.PromoCodeUsageUpsert) {
+//			SetPromoCodeID(v+v).
+//		}).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreate) OnConflict(opts ...sql.ConflictOption) *PromoCodeUsageUpsertOne {
+	_c.conflict = opts
+	return &PromoCodeUsageUpsertOne{
+		create: _c,
+	}
+}
+
+// OnConflictColumns calls `OnConflict` and configures the columns
+// as conflict target. Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(sql.ConflictColumns(columns...)).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreate) OnConflictColumns(columns ...string) *PromoCodeUsageUpsertOne {
+	_c.conflict = append(_c.conflict, sql.ConflictColumns(columns...))
+	return &PromoCodeUsageUpsertOne{
+		create: _c,
+	}
+}
+
+type (
+	// PromoCodeUsageUpsertOne is the builder for "upsert"-ing
+	//  one PromoCodeUsage node.
+	PromoCodeUsageUpsertOne struct {
+		create *PromoCodeUsageCreate
+	}
+
+	// PromoCodeUsageUpsert is the "OnConflict" setter.
+	PromoCodeUsageUpsert struct {
+		*sql.UpdateSet
+	}
+)
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (u *PromoCodeUsageUpsert) SetPromoCodeID(v int64) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldPromoCodeID, v)
+	return u
+}
+
+// UpdatePromoCodeID sets the "promo_code_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdatePromoCodeID() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldPromoCodeID)
+	return u
+}
+
+// SetUserID sets the "user_id" field.
+func (u *PromoCodeUsageUpsert) SetUserID(v int64) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldUserID, v)
+	return u
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdateUserID() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldUserID)
+	return u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (u *PromoCodeUsageUpsert) SetBonusAmount(v float64) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldBonusAmount, v)
+	return u
+}
+
+// UpdateBonusAmount sets the "bonus_amount" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdateBonusAmount() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldBonusAmount)
+	return u
+}
+
+// AddBonusAmount adds v to the "bonus_amount" field.
+func (u *PromoCodeUsageUpsert) AddBonusAmount(v float64) *PromoCodeUsageUpsert {
+	u.Add(promocodeusage.FieldBonusAmount, v)
+	return u
+}
+
+// SetUsedAt sets the "used_at" field.
+func (u *PromoCodeUsageUpsert) SetUsedAt(v time.Time) *PromoCodeUsageUpsert {
+	u.Set(promocodeusage.FieldUsedAt, v)
+	return u
+}
+
+// UpdateUsedAt sets the "used_at" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsert) UpdateUsedAt() *PromoCodeUsageUpsert {
+	u.SetExcluded(promocodeusage.FieldUsedAt)
+	return u
+}
+
+// UpdateNewValues updates the mutable fields using the new values that were set on create.
+// Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(
+//			sql.ResolveWithNewValues(),
+//		).
+//		Exec(ctx)
+func (u *PromoCodeUsageUpsertOne) UpdateNewValues() *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithNewValues())
+	return u
+}
+
+// Ignore sets each column to itself in case of conflict.
+// Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//	    OnConflict(sql.ResolveWithIgnore()).
+//	    Exec(ctx)
+func (u *PromoCodeUsageUpsertOne) Ignore() *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithIgnore())
+	return u
+}
+
+// DoNothing configures the conflict_action to `DO NOTHING`.
+// Supported only by SQLite and PostgreSQL.
+func (u *PromoCodeUsageUpsertOne) DoNothing() *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.DoNothing())
+	return u
+}
+
+// Update allows overriding fields `UPDATE` values. See the PromoCodeUsageCreate.OnConflict
+// documentation for more info.
+func (u *PromoCodeUsageUpsertOne) Update(set func(*PromoCodeUsageUpsert)) *PromoCodeUsageUpsertOne {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(update *sql.UpdateSet) {
+		set(&PromoCodeUsageUpsert{UpdateSet: update})
+	}))
+	return u
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (u *PromoCodeUsageUpsertOne) SetPromoCodeID(v int64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetPromoCodeID(v)
+	})
+}
+
+// UpdatePromoCodeID sets the "promo_code_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdatePromoCodeID() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdatePromoCodeID()
+	})
+}
+
+// SetUserID sets the "user_id" field.
+func (u *PromoCodeUsageUpsertOne) SetUserID(v int64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUserID(v)
+	})
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdateUserID() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUserID()
+	})
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertOne) SetBonusAmount(v float64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetBonusAmount(v)
+	})
+}
+
+// AddBonusAmount adds v to the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertOne) AddBonusAmount(v float64) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.AddBonusAmount(v)
+	})
+}
+
+// UpdateBonusAmount sets the "bonus_amount" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdateBonusAmount() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateBonusAmount()
+	})
+}
+
+// SetUsedAt sets the "used_at" field.
+func (u *PromoCodeUsageUpsertOne) SetUsedAt(v time.Time) *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUsedAt(v)
+	})
+}
+
+// UpdateUsedAt sets the "used_at" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertOne) UpdateUsedAt() *PromoCodeUsageUpsertOne {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUsedAt()
+	})
+}
+
+// Exec executes the query.
+func (u *PromoCodeUsageUpsertOne) Exec(ctx context.Context) error {
+	if len(u.create.conflict) == 0 {
+		return errors.New("ent: missing options for PromoCodeUsageCreate.OnConflict")
+	}
+	return u.create.Exec(ctx)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (u *PromoCodeUsageUpsertOne) ExecX(ctx context.Context) {
+	if err := u.create.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// Exec executes the UPSERT query and returns the inserted/updated ID.
+func (u *PromoCodeUsageUpsertOne) ID(ctx context.Context) (id int64, err error) {
+	node, err := u.create.Save(ctx)
+	if err != nil {
+		return id, err
+	}
+	return node.ID, nil
+}
+
+// IDX is like ID, but panics if an error occurs.
+func (u *PromoCodeUsageUpsertOne) IDX(ctx context.Context) int64 {
+	id, err := u.ID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// PromoCodeUsageCreateBulk is the builder for creating many PromoCodeUsage entities in bulk.
+type PromoCodeUsageCreateBulk struct {
+	config
+	err      error
+	builders []*PromoCodeUsageCreate
+	conflict []sql.ConflictOption
+}
+
+// Save creates the PromoCodeUsage entities in the database.
+func (_c *PromoCodeUsageCreateBulk) Save(ctx context.Context) ([]*PromoCodeUsage, error) {
+	if _c.err != nil {
+		return nil, _c.err
+	}
+	specs := make([]*sqlgraph.CreateSpec, len(_c.builders))
+	nodes := make([]*PromoCodeUsage, len(_c.builders))
+	mutators := make([]Mutator, len(_c.builders))
+	for i := range _c.builders {
+		func(i int, root context.Context) {
+			builder := _c.builders[i]
+			builder.defaults()
+			var mut Mutator = MutateFunc(func(ctx context.Context, m Mutation) (Value, error) {
+				mutation, ok := m.(*PromoCodeUsageMutation)
+				if !ok {
+					return nil, fmt.Errorf("unexpected mutation type %T", m)
+				}
+				if err := builder.check(); err != nil {
+					return nil, err
+				}
+				builder.mutation = mutation
+				var err error
+				nodes[i], specs[i] = builder.createSpec()
+				if i < len(mutators)-1 {
+					_, err = mutators[i+1].Mutate(root, _c.builders[i+1].mutation)
+				} else {
+					spec := &sqlgraph.BatchCreateSpec{Nodes: specs}
+					spec.OnConflict = _c.conflict
+					// Invoke the actual operation on the latest mutation in the chain.
+					if err = sqlgraph.BatchCreate(ctx, _c.driver, spec); err != nil {
+						if sqlgraph.IsConstraintError(err) {
+							err = &ConstraintError{msg: err.Error(), wrap: err}
+						}
+					}
+				}
+				if err != nil {
+					return nil, err
+				}
+				mutation.id = &nodes[i].ID
+				if specs[i].ID.Value != nil {
+					id := specs[i].ID.Value.(int64)
+					nodes[i].ID = int64(id)
+				}
+				mutation.done = true
+				return nodes[i], nil
+			})
+			for i := len(builder.hooks) - 1; i >= 0; i-- {
+				mut = builder.hooks[i](mut)
+			}
+			mutators[i] = mut
+		}(i, ctx)
+	}
+	if len(mutators) > 0 {
+		if _, err := mutators[0].Mutate(ctx, _c.builders[0].mutation); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_c *PromoCodeUsageCreateBulk) SaveX(ctx context.Context) []*PromoCodeUsage {
+	v, err := _c.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return v
+}
+
+// Exec executes the query.
+func (_c *PromoCodeUsageCreateBulk) Exec(ctx context.Context) error {
+	_, err := _c.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_c *PromoCodeUsageCreateBulk) ExecX(ctx context.Context) {
+	if err := _c.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// OnConflict allows configuring the `ON CONFLICT` / `ON DUPLICATE KEY` clause
+// of the `INSERT` statement. For example:
+//
+//	client.PromoCodeUsage.CreateBulk(builders...).
+//		OnConflict(
+//			// Update the row with the new values
+//			// the was proposed for insertion.
+//			sql.ResolveWithNewValues(),
+//		).
+//		// Override some of the fields with custom
+//		// update values.
+//		Update(func(u *ent.PromoCodeUsageUpsert) {
+//			SetPromoCodeID(v+v).
+//		}).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreateBulk) OnConflict(opts ...sql.ConflictOption) *PromoCodeUsageUpsertBulk {
+	_c.conflict = opts
+	return &PromoCodeUsageUpsertBulk{
+		create: _c,
+	}
+}
+
+// OnConflictColumns calls `OnConflict` and configures the columns
+// as conflict target. Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(sql.ConflictColumns(columns...)).
+//		Exec(ctx)
+func (_c *PromoCodeUsageCreateBulk) OnConflictColumns(columns ...string) *PromoCodeUsageUpsertBulk {
+	_c.conflict = append(_c.conflict, sql.ConflictColumns(columns...))
+	return &PromoCodeUsageUpsertBulk{
+		create: _c,
+	}
+}
+
+// PromoCodeUsageUpsertBulk is the builder for "upsert"-ing
+// a bulk of PromoCodeUsage nodes.
+type PromoCodeUsageUpsertBulk struct {
+	create *PromoCodeUsageCreateBulk
+}
+
+// UpdateNewValues updates the mutable fields using the new values that
+// were set on create. Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(
+//			sql.ResolveWithNewValues(),
+//		).
+//		Exec(ctx)
+func (u *PromoCodeUsageUpsertBulk) UpdateNewValues() *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithNewValues())
+	return u
+}
+
+// Ignore sets each column to itself in case of conflict.
+// Using this option is equivalent to using:
+//
+//	client.PromoCodeUsage.Create().
+//		OnConflict(sql.ResolveWithIgnore()).
+//		Exec(ctx)
+func (u *PromoCodeUsageUpsertBulk) Ignore() *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWithIgnore())
+	return u
+}
+
+// DoNothing configures the conflict_action to `DO NOTHING`.
+// Supported only by SQLite and PostgreSQL.
+func (u *PromoCodeUsageUpsertBulk) DoNothing() *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.DoNothing())
+	return u
+}
+
+// Update allows overriding fields `UPDATE` values. See the PromoCodeUsageCreateBulk.OnConflict
+// documentation for more info.
+func (u *PromoCodeUsageUpsertBulk) Update(set func(*PromoCodeUsageUpsert)) *PromoCodeUsageUpsertBulk {
+	u.create.conflict = append(u.create.conflict, sql.ResolveWith(func(update *sql.UpdateSet) {
+		set(&PromoCodeUsageUpsert{UpdateSet: update})
+	}))
+	return u
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (u *PromoCodeUsageUpsertBulk) SetPromoCodeID(v int64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetPromoCodeID(v)
+	})
+}
+
+// UpdatePromoCodeID sets the "promo_code_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdatePromoCodeID() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdatePromoCodeID()
+	})
+}
+
+// SetUserID sets the "user_id" field.
+func (u *PromoCodeUsageUpsertBulk) SetUserID(v int64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUserID(v)
+	})
+}
+
+// UpdateUserID sets the "user_id" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdateUserID() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUserID()
+	})
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertBulk) SetBonusAmount(v float64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetBonusAmount(v)
+	})
+}
+
+// AddBonusAmount adds v to the "bonus_amount" field.
+func (u *PromoCodeUsageUpsertBulk) AddBonusAmount(v float64) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.AddBonusAmount(v)
+	})
+}
+
+// UpdateBonusAmount sets the "bonus_amount" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdateBonusAmount() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateBonusAmount()
+	})
+}
+
+// SetUsedAt sets the "used_at" field.
+func (u *PromoCodeUsageUpsertBulk) SetUsedAt(v time.Time) *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.SetUsedAt(v)
+	})
+}
+
+// UpdateUsedAt sets the "used_at" field to the value that was provided on create.
+func (u *PromoCodeUsageUpsertBulk) UpdateUsedAt() *PromoCodeUsageUpsertBulk {
+	return u.Update(func(s *PromoCodeUsageUpsert) {
+		s.UpdateUsedAt()
+	})
+}
+
+// Exec executes the query.
+func (u *PromoCodeUsageUpsertBulk) Exec(ctx context.Context) error {
+	if u.create.err != nil {
+		return u.create.err
+	}
+	for i, b := range u.create.builders {
+		if len(b.conflict) != 0 {
+			return fmt.Errorf("ent: OnConflict was set for builder %d. Set it on the PromoCodeUsageCreateBulk instead", i)
+		}
+	}
+	if len(u.create.conflict) == 0 {
+		return errors.New("ent: missing options for PromoCodeUsageCreateBulk.OnConflict")
+	}
+	return u.create.Exec(ctx)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (u *PromoCodeUsageUpsertBulk) ExecX(ctx context.Context) {
+	if err := u.create.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

backend/ent/promocodeusage_delete.go

@@ -0,0 +1,88 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+)
+
+// PromoCodeUsageDelete is the builder for deleting a PromoCodeUsage entity.
+type PromoCodeUsageDelete struct {
+	config
+	hooks    []Hook
+	mutation *PromoCodeUsageMutation
+}
+
+// Where appends a list predicates to the PromoCodeUsageDelete builder.
+func (_d *PromoCodeUsageDelete) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageDelete {
+	_d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query and returns how many vertices were deleted.
+func (_d *PromoCodeUsageDelete) Exec(ctx context.Context) (int, error) {
+	return withHooks(ctx, _d.sqlExec, _d.mutation, _d.hooks)
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *PromoCodeUsageDelete) ExecX(ctx context.Context) int {
+	n, err := _d.Exec(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}
+
+func (_d *PromoCodeUsageDelete) sqlExec(ctx context.Context) (int, error) {
+	_spec := sqlgraph.NewDeleteSpec(promocodeusage.Table, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	if ps := _d.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	affected, err := sqlgraph.DeleteNodes(ctx, _d.driver, _spec)
+	if err != nil && sqlgraph.IsConstraintError(err) {
+		err = &ConstraintError{msg: err.Error(), wrap: err}
+	}
+	_d.mutation.done = true
+	return affected, err
+}
+
+// PromoCodeUsageDeleteOne is the builder for deleting a single PromoCodeUsage entity.
+type PromoCodeUsageDeleteOne struct {
+	_d *PromoCodeUsageDelete
+}
+
+// Where appends a list predicates to the PromoCodeUsageDelete builder.
+func (_d *PromoCodeUsageDeleteOne) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageDeleteOne {
+	_d._d.mutation.Where(ps...)
+	return _d
+}
+
+// Exec executes the deletion query.
+func (_d *PromoCodeUsageDeleteOne) Exec(ctx context.Context) error {
+	n, err := _d._d.Exec(ctx)
+	switch {
+	case err != nil:
+		return err
+	case n == 0:
+		return &NotFoundError{promocodeusage.Label}
+	default:
+		return nil
+	}
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_d *PromoCodeUsageDeleteOne) ExecX(ctx context.Context) {
+	if err := _d.Exec(ctx); err != nil {
+		panic(err)
+	}
+}

backend/ent/promocodeusage_query.go

@@ -0,0 +1,718 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"fmt"
+	"math"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsageQuery is the builder for querying PromoCodeUsage entities.
+type PromoCodeUsageQuery struct {
+	config
+	ctx           *QueryContext
+	order         []promocodeusage.OrderOption
+	inters        []Interceptor
+	predicates    []predicate.PromoCodeUsage
+	withPromoCode *PromoCodeQuery
+	withUser      *UserQuery
+	modifiers     []func(*sql.Selector)
+	// intermediate query (i.e. traversal path).
+	sql  *sql.Selector
+	path func(context.Context) (*sql.Selector, error)
+}
+
+// Where adds a new predicate for the PromoCodeUsageQuery builder.
+func (_q *PromoCodeUsageQuery) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageQuery {
+	_q.predicates = append(_q.predicates, ps...)
+	return _q
+}
+
+// Limit the number of records to be returned by this query.
+func (_q *PromoCodeUsageQuery) Limit(limit int) *PromoCodeUsageQuery {
+	_q.ctx.Limit = &limit
+	return _q
+}
+
+// Offset to start from.
+func (_q *PromoCodeUsageQuery) Offset(offset int) *PromoCodeUsageQuery {
+	_q.ctx.Offset = &offset
+	return _q
+}
+
+// Unique configures the query builder to filter duplicate records on query.
+// By default, unique is set to true, and can be disabled using this method.
+func (_q *PromoCodeUsageQuery) Unique(unique bool) *PromoCodeUsageQuery {
+	_q.ctx.Unique = &unique
+	return _q
+}
+
+// Order specifies how the records should be ordered.
+func (_q *PromoCodeUsageQuery) Order(o ...promocodeusage.OrderOption) *PromoCodeUsageQuery {
+	_q.order = append(_q.order, o...)
+	return _q
+}
+
+// QueryPromoCode chains the current query on the "promo_code" edge.
+func (_q *PromoCodeUsageQuery) QueryPromoCode() *PromoCodeQuery {
+	query := (&PromoCodeClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocodeusage.Table, promocodeusage.FieldID, selector),
+			sqlgraph.To(promocode.Table, promocode.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, promocodeusage.PromoCodeTable, promocodeusage.PromoCodeColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// QueryUser chains the current query on the "user" edge.
+func (_q *PromoCodeUsageQuery) QueryUser() *UserQuery {
+	query := (&UserClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(promocodeusage.Table, promocodeusage.FieldID, selector),
+			sqlgraph.To(user.Table, user.FieldID),
+			sqlgraph.Edge(sqlgraph.M2O, true, promocodeusage.UserTable, promocodeusage.UserColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
+// First returns the first PromoCodeUsage entity from the query.
+// Returns a *NotFoundError when no PromoCodeUsage was found.
+func (_q *PromoCodeUsageQuery) First(ctx context.Context) (*PromoCodeUsage, error) {
+	nodes, err := _q.Limit(1).All(setContextOp(ctx, _q.ctx, ent.OpQueryFirst))
+	if err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nil, &NotFoundError{promocodeusage.Label}
+	}
+	return nodes[0], nil
+}
+
+// FirstX is like First, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) FirstX(ctx context.Context) *PromoCodeUsage {
+	node, err := _q.First(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return node
+}
+
+// FirstID returns the first PromoCodeUsage ID from the query.
+// Returns a *NotFoundError when no PromoCodeUsage ID was found.
+func (_q *PromoCodeUsageQuery) FirstID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(1).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryFirstID)); err != nil {
+		return
+	}
+	if len(ids) == 0 {
+		err = &NotFoundError{promocodeusage.Label}
+		return
+	}
+	return ids[0], nil
+}
+
+// FirstIDX is like FirstID, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) FirstIDX(ctx context.Context) int64 {
+	id, err := _q.FirstID(ctx)
+	if err != nil && !IsNotFound(err) {
+		panic(err)
+	}
+	return id
+}
+
+// Only returns a single PromoCodeUsage entity found by the query, ensuring it only returns one.
+// Returns a *NotSingularError when more than one PromoCodeUsage entity is found.
+// Returns a *NotFoundError when no PromoCodeUsage entities are found.
+func (_q *PromoCodeUsageQuery) Only(ctx context.Context) (*PromoCodeUsage, error) {
+	nodes, err := _q.Limit(2).All(setContextOp(ctx, _q.ctx, ent.OpQueryOnly))
+	if err != nil {
+		return nil, err
+	}
+	switch len(nodes) {
+	case 1:
+		return nodes[0], nil
+	case 0:
+		return nil, &NotFoundError{promocodeusage.Label}
+	default:
+		return nil, &NotSingularError{promocodeusage.Label}
+	}
+}
+
+// OnlyX is like Only, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) OnlyX(ctx context.Context) *PromoCodeUsage {
+	node, err := _q.Only(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// OnlyID is like Only, but returns the only PromoCodeUsage ID in the query.
+// Returns a *NotSingularError when more than one PromoCodeUsage ID is found.
+// Returns a *NotFoundError when no entities are found.
+func (_q *PromoCodeUsageQuery) OnlyID(ctx context.Context) (id int64, err error) {
+	var ids []int64
+	if ids, err = _q.Limit(2).IDs(setContextOp(ctx, _q.ctx, ent.OpQueryOnlyID)); err != nil {
+		return
+	}
+	switch len(ids) {
+	case 1:
+		id = ids[0]
+	case 0:
+		err = &NotFoundError{promocodeusage.Label}
+	default:
+		err = &NotSingularError{promocodeusage.Label}
+	}
+	return
+}
+
+// OnlyIDX is like OnlyID, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) OnlyIDX(ctx context.Context) int64 {
+	id, err := _q.OnlyID(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return id
+}
+
+// All executes the query and returns a list of PromoCodeUsages.
+func (_q *PromoCodeUsageQuery) All(ctx context.Context) ([]*PromoCodeUsage, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryAll)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return nil, err
+	}
+	qr := querierAll[[]*PromoCodeUsage, *PromoCodeUsageQuery]()
+	return withInterceptors[[]*PromoCodeUsage](ctx, _q, qr, _q.inters)
+}
+
+// AllX is like All, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) AllX(ctx context.Context) []*PromoCodeUsage {
+	nodes, err := _q.All(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return nodes
+}
+
+// IDs executes the query and returns a list of PromoCodeUsage IDs.
+func (_q *PromoCodeUsageQuery) IDs(ctx context.Context) (ids []int64, err error) {
+	if _q.ctx.Unique == nil && _q.path != nil {
+		_q.Unique(true)
+	}
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryIDs)
+	if err = _q.Select(promocodeusage.FieldID).Scan(ctx, &ids); err != nil {
+		return nil, err
+	}
+	return ids, nil
+}
+
+// IDsX is like IDs, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) IDsX(ctx context.Context) []int64 {
+	ids, err := _q.IDs(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return ids
+}
+
+// Count returns the count of the given query.
+func (_q *PromoCodeUsageQuery) Count(ctx context.Context) (int, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryCount)
+	if err := _q.prepareQuery(ctx); err != nil {
+		return 0, err
+	}
+	return withInterceptors[int](ctx, _q, querierCount[*PromoCodeUsageQuery](), _q.inters)
+}
+
+// CountX is like Count, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) CountX(ctx context.Context) int {
+	count, err := _q.Count(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return count
+}
+
+// Exist returns true if the query has elements in the graph.
+func (_q *PromoCodeUsageQuery) Exist(ctx context.Context) (bool, error) {
+	ctx = setContextOp(ctx, _q.ctx, ent.OpQueryExist)
+	switch _, err := _q.FirstID(ctx); {
+	case IsNotFound(err):
+		return false, nil
+	case err != nil:
+		return false, fmt.Errorf("ent: check existence: %w", err)
+	default:
+		return true, nil
+	}
+}
+
+// ExistX is like Exist, but panics if an error occurs.
+func (_q *PromoCodeUsageQuery) ExistX(ctx context.Context) bool {
+	exist, err := _q.Exist(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return exist
+}
+
+// Clone returns a duplicate of the PromoCodeUsageQuery builder, including all associated steps. It can be
+// used to prepare common query builders and use them differently after the clone is made.
+func (_q *PromoCodeUsageQuery) Clone() *PromoCodeUsageQuery {
+	if _q == nil {
+		return nil
+	}
+	return &PromoCodeUsageQuery{
+		config:        _q.config,
+		ctx:           _q.ctx.Clone(),
+		order:         append([]promocodeusage.OrderOption{}, _q.order...),
+		inters:        append([]Interceptor{}, _q.inters...),
+		predicates:    append([]predicate.PromoCodeUsage{}, _q.predicates...),
+		withPromoCode: _q.withPromoCode.Clone(),
+		withUser:      _q.withUser.Clone(),
+		// clone intermediate query.
+		sql:  _q.sql.Clone(),
+		path: _q.path,
+	}
+}
+
+// WithPromoCode tells the query-builder to eager-load the nodes that are connected to
+// the "promo_code" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *PromoCodeUsageQuery) WithPromoCode(opts ...func(*PromoCodeQuery)) *PromoCodeUsageQuery {
+	query := (&PromoCodeClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withPromoCode = query
+	return _q
+}
+
+// WithUser tells the query-builder to eager-load the nodes that are connected to
+// the "user" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *PromoCodeUsageQuery) WithUser(opts ...func(*UserQuery)) *PromoCodeUsageQuery {
+	query := (&UserClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withUser = query
+	return _q
+}
+
+// GroupBy is used to group vertices by one or more fields/columns.
+// It is often used with aggregate functions, like: count, max, mean, min, sum.
+//
+// Example:
+//
+//	var v []struct {
+//		PromoCodeID int64 `json:"promo_code_id,omitempty"`
+//		Count int `json:"count,omitempty"`
+//	}
+//
+//	client.PromoCodeUsage.Query().
+//		GroupBy(promocodeusage.FieldPromoCodeID).
+//		Aggregate(ent.Count()).
+//		Scan(ctx, &v)
+func (_q *PromoCodeUsageQuery) GroupBy(field string, fields ...string) *PromoCodeUsageGroupBy {
+	_q.ctx.Fields = append([]string{field}, fields...)
+	grbuild := &PromoCodeUsageGroupBy{build: _q}
+	grbuild.flds = &_q.ctx.Fields
+	grbuild.label = promocodeusage.Label
+	grbuild.scan = grbuild.Scan
+	return grbuild
+}
+
+// Select allows the selection one or more fields/columns for the given query,
+// instead of selecting all fields in the entity.
+//
+// Example:
+//
+//	var v []struct {
+//		PromoCodeID int64 `json:"promo_code_id,omitempty"`
+//	}
+//
+//	client.PromoCodeUsage.Query().
+//		Select(promocodeusage.FieldPromoCodeID).
+//		Scan(ctx, &v)
+func (_q *PromoCodeUsageQuery) Select(fields ...string) *PromoCodeUsageSelect {
+	_q.ctx.Fields = append(_q.ctx.Fields, fields...)
+	sbuild := &PromoCodeUsageSelect{PromoCodeUsageQuery: _q}
+	sbuild.label = promocodeusage.Label
+	sbuild.flds, sbuild.scan = &_q.ctx.Fields, sbuild.Scan
+	return sbuild
+}
+
+// Aggregate returns a PromoCodeUsageSelect configured with the given aggregations.
+func (_q *PromoCodeUsageQuery) Aggregate(fns ...AggregateFunc) *PromoCodeUsageSelect {
+	return _q.Select().Aggregate(fns...)
+}
+
+func (_q *PromoCodeUsageQuery) prepareQuery(ctx context.Context) error {
+	for _, inter := range _q.inters {
+		if inter == nil {
+			return fmt.Errorf("ent: uninitialized interceptor (forgotten import ent/runtime?)")
+		}
+		if trv, ok := inter.(Traverser); ok {
+			if err := trv.Traverse(ctx, _q); err != nil {
+				return err
+			}
+		}
+	}
+	for _, f := range _q.ctx.Fields {
+		if !promocodeusage.ValidColumn(f) {
+			return &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+		}
+	}
+	if _q.path != nil {
+		prev, err := _q.path(ctx)
+		if err != nil {
+			return err
+		}
+		_q.sql = prev
+	}
+	return nil
+}
+
+func (_q *PromoCodeUsageQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*PromoCodeUsage, error) {
+	var (
+		nodes       = []*PromoCodeUsage{}
+		_spec       = _q.querySpec()
+		loadedTypes = [2]bool{
+			_q.withPromoCode != nil,
+			_q.withUser != nil,
+		}
+	)
+	_spec.ScanValues = func(columns []string) ([]any, error) {
+		return (*PromoCodeUsage).scanValues(nil, columns)
+	}
+	_spec.Assign = func(columns []string, values []any) error {
+		node := &PromoCodeUsage{config: _q.config}
+		nodes = append(nodes, node)
+		node.Edges.loadedTypes = loadedTypes
+		return node.assignValues(columns, values)
+	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	for i := range hooks {
+		hooks[i](ctx, _spec)
+	}
+	if err := sqlgraph.QueryNodes(ctx, _q.driver, _spec); err != nil {
+		return nil, err
+	}
+	if len(nodes) == 0 {
+		return nodes, nil
+	}
+	if query := _q.withPromoCode; query != nil {
+		if err := _q.loadPromoCode(ctx, query, nodes, nil,
+			func(n *PromoCodeUsage, e *PromoCode) { n.Edges.PromoCode = e }); err != nil {
+			return nil, err
+		}
+	}
+	if query := _q.withUser; query != nil {
+		if err := _q.loadUser(ctx, query, nodes, nil,
+			func(n *PromoCodeUsage, e *User) { n.Edges.User = e }); err != nil {
+			return nil, err
+		}
+	}
+	return nodes, nil
+}
+
+func (_q *PromoCodeUsageQuery) loadPromoCode(ctx context.Context, query *PromoCodeQuery, nodes []*PromoCodeUsage, init func(*PromoCodeUsage), assign func(*PromoCodeUsage, *PromoCode)) error {
+	ids := make([]int64, 0, len(nodes))
+	nodeids := make(map[int64][]*PromoCodeUsage)
+	for i := range nodes {
+		fk := nodes[i].PromoCodeID
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	if len(ids) == 0 {
+		return nil
+	}
+	query.Where(promocode.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "promo_code_id" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+func (_q *PromoCodeUsageQuery) loadUser(ctx context.Context, query *UserQuery, nodes []*PromoCodeUsage, init func(*PromoCodeUsage), assign func(*PromoCodeUsage, *User)) error {
+	ids := make([]int64, 0, len(nodes))
+	nodeids := make(map[int64][]*PromoCodeUsage)
+	for i := range nodes {
+		fk := nodes[i].UserID
+		if _, ok := nodeids[fk]; !ok {
+			ids = append(ids, fk)
+		}
+		nodeids[fk] = append(nodeids[fk], nodes[i])
+	}
+	if len(ids) == 0 {
+		return nil
+	}
+	query.Where(user.IDIn(ids...))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		nodes, ok := nodeids[n.ID]
+		if !ok {
+			return fmt.Errorf(`unexpected foreign-key "user_id" returned %v`, n.ID)
+		}
+		for i := range nodes {
+			assign(nodes[i], n)
+		}
+	}
+	return nil
+}
+
+func (_q *PromoCodeUsageQuery) sqlCount(ctx context.Context) (int, error) {
+	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
+	_spec.Node.Columns = _q.ctx.Fields
+	if len(_q.ctx.Fields) > 0 {
+		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
+	}
+	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
+}
+
+func (_q *PromoCodeUsageQuery) querySpec() *sqlgraph.QuerySpec {
+	_spec := sqlgraph.NewQuerySpec(promocodeusage.Table, promocodeusage.Columns, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	_spec.From = _q.sql
+	if unique := _q.ctx.Unique; unique != nil {
+		_spec.Unique = *unique
+	} else if _q.path != nil {
+		_spec.Unique = true
+	}
+	if fields := _q.ctx.Fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocodeusage.FieldID)
+		for i := range fields {
+			if fields[i] != promocodeusage.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, fields[i])
+			}
+		}
+		if _q.withPromoCode != nil {
+			_spec.Node.AddColumnOnce(promocodeusage.FieldPromoCodeID)
+		}
+		if _q.withUser != nil {
+			_spec.Node.AddColumnOnce(promocodeusage.FieldUserID)
+		}
+	}
+	if ps := _q.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		_spec.Limit = *limit
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		_spec.Offset = *offset
+	}
+	if ps := _q.order; len(ps) > 0 {
+		_spec.Order = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	return _spec
+}
+
+func (_q *PromoCodeUsageQuery) sqlQuery(ctx context.Context) *sql.Selector {
+	builder := sql.Dialect(_q.driver.Dialect())
+	t1 := builder.Table(promocodeusage.Table)
+	columns := _q.ctx.Fields
+	if len(columns) == 0 {
+		columns = promocodeusage.Columns
+	}
+	selector := builder.Select(t1.Columns(columns...)...).From(t1)
+	if _q.sql != nil {
+		selector = _q.sql
+		selector.Select(selector.Columns(columns...)...)
+	}
+	if _q.ctx.Unique != nil && *_q.ctx.Unique {
+		selector.Distinct()
+	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
+	for _, p := range _q.predicates {
+		p(selector)
+	}
+	for _, p := range _q.order {
+		p(selector)
+	}
+	if offset := _q.ctx.Offset; offset != nil {
+		// limit is mandatory for offset clause. We start
+		// with default value, and override it below if needed.
+		selector.Offset(*offset).Limit(math.MaxInt32)
+	}
+	if limit := _q.ctx.Limit; limit != nil {
+		selector.Limit(*limit)
+	}
+	return selector
+}
+
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *PromoCodeUsageQuery) ForUpdate(opts ...sql.LockOption) *PromoCodeUsageQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *PromoCodeUsageQuery) ForShare(opts ...sql.LockOption) *PromoCodeUsageQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
+// PromoCodeUsageGroupBy is the group-by builder for PromoCodeUsage entities.
+type PromoCodeUsageGroupBy struct {
+	selector
+	build *PromoCodeUsageQuery
+}
+
+// Aggregate adds the given aggregation functions to the group-by query.
+func (_g *PromoCodeUsageGroupBy) Aggregate(fns ...AggregateFunc) *PromoCodeUsageGroupBy {
+	_g.fns = append(_g.fns, fns...)
+	return _g
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_g *PromoCodeUsageGroupBy) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _g.build.ctx, ent.OpQueryGroupBy)
+	if err := _g.build.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeUsageQuery, *PromoCodeUsageGroupBy](ctx, _g.build, _g, _g.build.inters, v)
+}
+
+func (_g *PromoCodeUsageGroupBy) sqlScan(ctx context.Context, root *PromoCodeUsageQuery, v any) error {
+	selector := root.sqlQuery(ctx).Select()
+	aggregation := make([]string, 0, len(_g.fns))
+	for _, fn := range _g.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	if len(selector.SelectedColumns()) == 0 {
+		columns := make([]string, 0, len(*_g.flds)+len(_g.fns))
+		for _, f := range *_g.flds {
+			columns = append(columns, selector.C(f))
+		}
+		columns = append(columns, aggregation...)
+		selector.Select(columns...)
+	}
+	selector.GroupBy(selector.Columns(*_g.flds...)...)
+	if err := selector.Err(); err != nil {
+		return err
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _g.build.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}
+
+// PromoCodeUsageSelect is the builder for selecting fields of PromoCodeUsage entities.
+type PromoCodeUsageSelect struct {
+	*PromoCodeUsageQuery
+	selector
+}
+
+// Aggregate adds the given aggregation functions to the selector query.
+func (_s *PromoCodeUsageSelect) Aggregate(fns ...AggregateFunc) *PromoCodeUsageSelect {
+	_s.fns = append(_s.fns, fns...)
+	return _s
+}
+
+// Scan applies the selector query and scans the result into the given value.
+func (_s *PromoCodeUsageSelect) Scan(ctx context.Context, v any) error {
+	ctx = setContextOp(ctx, _s.ctx, ent.OpQuerySelect)
+	if err := _s.prepareQuery(ctx); err != nil {
+		return err
+	}
+	return scanWithInterceptors[*PromoCodeUsageQuery, *PromoCodeUsageSelect](ctx, _s.PromoCodeUsageQuery, _s, _s.inters, v)
+}
+
+func (_s *PromoCodeUsageSelect) sqlScan(ctx context.Context, root *PromoCodeUsageQuery, v any) error {
+	selector := root.sqlQuery(ctx)
+	aggregation := make([]string, 0, len(_s.fns))
+	for _, fn := range _s.fns {
+		aggregation = append(aggregation, fn(selector))
+	}
+	switch n := len(*_s.selector.flds); {
+	case n == 0 && len(aggregation) > 0:
+		selector.Select(aggregation...)
+	case n != 0 && len(aggregation) > 0:
+		selector.AppendSelect(aggregation...)
+	}
+	rows := &sql.Rows{}
+	query, args := selector.Query()
+	if err := _s.driver.Query(ctx, query, args, rows); err != nil {
+		return err
+	}
+	defer rows.Close()
+	return sql.ScanSlice(rows, v)
+}

backend/ent/promocodeusage_update.go

@@ -0,0 +1,510 @@
+// Code generated by ent, DO NOT EDIT.
+
+package ent
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"time"
+
+	"entgo.io/ent/dialect/sql"
+	"entgo.io/ent/dialect/sql/sqlgraph"
+	"entgo.io/ent/schema/field"
+	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/ent/user"
+)
+
+// PromoCodeUsageUpdate is the builder for updating PromoCodeUsage entities.
+type PromoCodeUsageUpdate struct {
+	config
+	hooks    []Hook
+	mutation *PromoCodeUsageMutation
+}
+
+// Where appends a list predicates to the PromoCodeUsageUpdate builder.
+func (_u *PromoCodeUsageUpdate) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageUpdate {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (_u *PromoCodeUsageUpdate) SetPromoCodeID(v int64) *PromoCodeUsageUpdate {
+	_u.mutation.SetPromoCodeID(v)
+	return _u
+}
+
+// SetNillablePromoCodeID sets the "promo_code_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillablePromoCodeID(v *int64) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetPromoCodeID(*v)
+	}
+	return _u
+}
+
+// SetUserID sets the "user_id" field.
+func (_u *PromoCodeUsageUpdate) SetUserID(v int64) *PromoCodeUsageUpdate {
+	_u.mutation.SetUserID(v)
+	return _u
+}
+
+// SetNillableUserID sets the "user_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillableUserID(v *int64) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetUserID(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdate) SetBonusAmount(v float64) *PromoCodeUsageUpdate {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillableBonusAmount(v *float64) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdate) AddBonusAmount(v float64) *PromoCodeUsageUpdate {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetUsedAt sets the "used_at" field.
+func (_u *PromoCodeUsageUpdate) SetUsedAt(v time.Time) *PromoCodeUsageUpdate {
+	_u.mutation.SetUsedAt(v)
+	return _u
+}
+
+// SetNillableUsedAt sets the "used_at" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdate) SetNillableUsedAt(v *time.Time) *PromoCodeUsageUpdate {
+	if v != nil {
+		_u.SetUsedAt(*v)
+	}
+	return _u
+}
+
+// SetPromoCode sets the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdate) SetPromoCode(v *PromoCode) *PromoCodeUsageUpdate {
+	return _u.SetPromoCodeID(v.ID)
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdate) SetUser(v *User) *PromoCodeUsageUpdate {
+	return _u.SetUserID(v.ID)
+}
+
+// Mutation returns the PromoCodeUsageMutation object of the builder.
+func (_u *PromoCodeUsageUpdate) Mutation() *PromoCodeUsageMutation {
+	return _u.mutation
+}
+
+// ClearPromoCode clears the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdate) ClearPromoCode() *PromoCodeUsageUpdate {
+	_u.mutation.ClearPromoCode()
+	return _u
+}
+
+// ClearUser clears the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdate) ClearUser() *PromoCodeUsageUpdate {
+	_u.mutation.ClearUser()
+	return _u
+}
+
+// Save executes the query and returns the number of nodes affected by the update operation.
+func (_u *PromoCodeUsageUpdate) Save(ctx context.Context) (int, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdate) SaveX(ctx context.Context) int {
+	affected, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return affected
+}
+
+// Exec executes the query.
+func (_u *PromoCodeUsageUpdate) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdate) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUsageUpdate) check() error {
+	if _u.mutation.PromoCodeCleared() && len(_u.mutation.PromoCodeIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.promo_code"`)
+	}
+	if _u.mutation.UserCleared() && len(_u.mutation.UserIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.user"`)
+	}
+	return nil
+}
+
+func (_u *PromoCodeUsageUpdate) sqlSave(ctx context.Context) (_node int, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocodeusage.Table, promocodeusage.Columns, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.UsedAt(); ok {
+		_spec.SetField(promocodeusage.FieldUsedAt, field.TypeTime, value)
+	}
+	if _u.mutation.PromoCodeCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.PromoCodeIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _u.mutation.UserCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UserIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocodeusage.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return 0, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}
+
+// PromoCodeUsageUpdateOne is the builder for updating a single PromoCodeUsage entity.
+type PromoCodeUsageUpdateOne struct {
+	config
+	fields   []string
+	hooks    []Hook
+	mutation *PromoCodeUsageMutation
+}
+
+// SetPromoCodeID sets the "promo_code_id" field.
+func (_u *PromoCodeUsageUpdateOne) SetPromoCodeID(v int64) *PromoCodeUsageUpdateOne {
+	_u.mutation.SetPromoCodeID(v)
+	return _u
+}
+
+// SetNillablePromoCodeID sets the "promo_code_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillablePromoCodeID(v *int64) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetPromoCodeID(*v)
+	}
+	return _u
+}
+
+// SetUserID sets the "user_id" field.
+func (_u *PromoCodeUsageUpdateOne) SetUserID(v int64) *PromoCodeUsageUpdateOne {
+	_u.mutation.SetUserID(v)
+	return _u
+}
+
+// SetNillableUserID sets the "user_id" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillableUserID(v *int64) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetUserID(*v)
+	}
+	return _u
+}
+
+// SetBonusAmount sets the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdateOne) SetBonusAmount(v float64) *PromoCodeUsageUpdateOne {
+	_u.mutation.ResetBonusAmount()
+	_u.mutation.SetBonusAmount(v)
+	return _u
+}
+
+// SetNillableBonusAmount sets the "bonus_amount" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillableBonusAmount(v *float64) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetBonusAmount(*v)
+	}
+	return _u
+}
+
+// AddBonusAmount adds value to the "bonus_amount" field.
+func (_u *PromoCodeUsageUpdateOne) AddBonusAmount(v float64) *PromoCodeUsageUpdateOne {
+	_u.mutation.AddBonusAmount(v)
+	return _u
+}
+
+// SetUsedAt sets the "used_at" field.
+func (_u *PromoCodeUsageUpdateOne) SetUsedAt(v time.Time) *PromoCodeUsageUpdateOne {
+	_u.mutation.SetUsedAt(v)
+	return _u
+}
+
+// SetNillableUsedAt sets the "used_at" field if the given value is not nil.
+func (_u *PromoCodeUsageUpdateOne) SetNillableUsedAt(v *time.Time) *PromoCodeUsageUpdateOne {
+	if v != nil {
+		_u.SetUsedAt(*v)
+	}
+	return _u
+}
+
+// SetPromoCode sets the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdateOne) SetPromoCode(v *PromoCode) *PromoCodeUsageUpdateOne {
+	return _u.SetPromoCodeID(v.ID)
+}
+
+// SetUser sets the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdateOne) SetUser(v *User) *PromoCodeUsageUpdateOne {
+	return _u.SetUserID(v.ID)
+}
+
+// Mutation returns the PromoCodeUsageMutation object of the builder.
+func (_u *PromoCodeUsageUpdateOne) Mutation() *PromoCodeUsageMutation {
+	return _u.mutation
+}
+
+// ClearPromoCode clears the "promo_code" edge to the PromoCode entity.
+func (_u *PromoCodeUsageUpdateOne) ClearPromoCode() *PromoCodeUsageUpdateOne {
+	_u.mutation.ClearPromoCode()
+	return _u
+}
+
+// ClearUser clears the "user" edge to the User entity.
+func (_u *PromoCodeUsageUpdateOne) ClearUser() *PromoCodeUsageUpdateOne {
+	_u.mutation.ClearUser()
+	return _u
+}
+
+// Where appends a list predicates to the PromoCodeUsageUpdate builder.
+func (_u *PromoCodeUsageUpdateOne) Where(ps ...predicate.PromoCodeUsage) *PromoCodeUsageUpdateOne {
+	_u.mutation.Where(ps...)
+	return _u
+}
+
+// Select allows selecting one or more fields (columns) of the returned entity.
+// The default is selecting all fields defined in the entity schema.
+func (_u *PromoCodeUsageUpdateOne) Select(field string, fields ...string) *PromoCodeUsageUpdateOne {
+	_u.fields = append([]string{field}, fields...)
+	return _u
+}
+
+// Save executes the query and returns the updated PromoCodeUsage entity.
+func (_u *PromoCodeUsageUpdateOne) Save(ctx context.Context) (*PromoCodeUsage, error) {
+	return withHooks(ctx, _u.sqlSave, _u.mutation, _u.hooks)
+}
+
+// SaveX is like Save, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdateOne) SaveX(ctx context.Context) *PromoCodeUsage {
+	node, err := _u.Save(ctx)
+	if err != nil {
+		panic(err)
+	}
+	return node
+}
+
+// Exec executes the query on the entity.
+func (_u *PromoCodeUsageUpdateOne) Exec(ctx context.Context) error {
+	_, err := _u.Save(ctx)
+	return err
+}
+
+// ExecX is like Exec, but panics if an error occurs.
+func (_u *PromoCodeUsageUpdateOne) ExecX(ctx context.Context) {
+	if err := _u.Exec(ctx); err != nil {
+		panic(err)
+	}
+}
+
+// check runs all checks and user-defined validators on the builder.
+func (_u *PromoCodeUsageUpdateOne) check() error {
+	if _u.mutation.PromoCodeCleared() && len(_u.mutation.PromoCodeIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.promo_code"`)
+	}
+	if _u.mutation.UserCleared() && len(_u.mutation.UserIDs()) > 0 {
+		return errors.New(`ent: clearing a required unique edge "PromoCodeUsage.user"`)
+	}
+	return nil
+}
+
+func (_u *PromoCodeUsageUpdateOne) sqlSave(ctx context.Context) (_node *PromoCodeUsage, err error) {
+	if err := _u.check(); err != nil {
+		return _node, err
+	}
+	_spec := sqlgraph.NewUpdateSpec(promocodeusage.Table, promocodeusage.Columns, sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64))
+	id, ok := _u.mutation.ID()
+	if !ok {
+		return nil, &ValidationError{Name: "id", err: errors.New(`ent: missing "PromoCodeUsage.id" for update`)}
+	}
+	_spec.Node.ID.Value = id
+	if fields := _u.fields; len(fields) > 0 {
+		_spec.Node.Columns = make([]string, 0, len(fields))
+		_spec.Node.Columns = append(_spec.Node.Columns, promocodeusage.FieldID)
+		for _, f := range fields {
+			if !promocodeusage.ValidColumn(f) {
+				return nil, &ValidationError{Name: f, err: fmt.Errorf("ent: invalid field %q for query", f)}
+			}
+			if f != promocodeusage.FieldID {
+				_spec.Node.Columns = append(_spec.Node.Columns, f)
+			}
+		}
+	}
+	if ps := _u.mutation.predicates; len(ps) > 0 {
+		_spec.Predicate = func(selector *sql.Selector) {
+			for i := range ps {
+				ps[i](selector)
+			}
+		}
+	}
+	if value, ok := _u.mutation.BonusAmount(); ok {
+		_spec.SetField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.AddedBonusAmount(); ok {
+		_spec.AddField(promocodeusage.FieldBonusAmount, field.TypeFloat64, value)
+	}
+	if value, ok := _u.mutation.UsedAt(); ok {
+		_spec.SetField(promocodeusage.FieldUsedAt, field.TypeTime, value)
+	}
+	if _u.mutation.PromoCodeCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.PromoCodeIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.PromoCodeTable,
+			Columns: []string{promocodeusage.PromoCodeColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocode.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	if _u.mutation.UserCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.UserIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.M2O,
+			Inverse: true,
+			Table:   promocodeusage.UserTable,
+			Columns: []string{promocodeusage.UserColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(user.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
+	_node = &PromoCodeUsage{config: _u.config}
+	_spec.Assign = _node.assignValues
+	_spec.ScanValues = _node.scanValues
+	if err = sqlgraph.UpdateNode(ctx, _u.driver, _spec); err != nil {
+		if _, ok := err.(*sqlgraph.NotFoundError); ok {
+			err = &NotFoundError{promocodeusage.Label}
+		} else if sqlgraph.IsConstraintError(err) {
+			err = &ConstraintError{msg: err.Error(), wrap: err}
+		}
+		return nil, err
+	}
+	_u.mutation.done = true
+	return _node, nil
+}

backend/ent/proxy_query.go

@@ -9,6 +9,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -25,6 +26,7 @@ type ProxyQuery struct {
 	inters       []Interceptor
 	predicates   []predicate.Proxy
 	withAccounts *AccountQuery
+	modifiers    []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -384,6 +386,9 @@ func (_q *ProxyQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Proxy,
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -439,6 +444,9 @@ func (_q *ProxyQuery) loadAccounts(ctx context.Context, query *AccountQuery, nod
 
 func (_q *ProxyQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -501,6 +509,9 @@ func (_q *ProxyQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -518,6 +529,32 @@ func (_q *ProxyQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *ProxyQuery) ForUpdate(opts ...sql.LockOption) *ProxyQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *ProxyQuery) ForShare(opts ...sql.LockOption) *ProxyQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // ProxyGroupBy is the group-by builder for Proxy entities.
 type ProxyGroupBy struct {
 	selector

backend/ent/redeemcode_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -26,6 +27,7 @@ type RedeemCodeQuery struct {
 	predicates []predicate.RedeemCode
 	withUser   *UserQuery
 	withGroup  *GroupQuery
+	modifiers  []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -420,6 +422,9 @@ func (_q *RedeemCodeQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*R
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -511,6 +516,9 @@ func (_q *RedeemCodeQuery) loadGroup(ctx context.Context, query *GroupQuery, nod
 
 func (_q *RedeemCodeQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -579,6 +587,9 @@ func (_q *RedeemCodeQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -596,6 +607,32 @@ func (_q *RedeemCodeQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *RedeemCodeQuery) ForUpdate(opts ...sql.LockOption) *RedeemCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *RedeemCodeQuery) ForShare(opts ...sql.LockOption) *RedeemCodeQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // RedeemCodeGroupBy is the group-by builder for RedeemCode entities.
 type RedeemCodeGroupBy struct {
 	selector

backend/ent/runtime/runtime.go

@@ -9,6 +9,8 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/accountgroup"
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/proxy"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/schema"
@@ -274,6 +276,60 @@ func init() {
 	groupDescClaudeCodeOnly := groupFields[14].Descriptor()
 	// group.DefaultClaudeCodeOnly holds the default value on creation for the claude_code_only field.
 	group.DefaultClaudeCodeOnly = groupDescClaudeCodeOnly.Default.(bool)
+	promocodeFields := schema.PromoCode{}.Fields()
+	_ = promocodeFields
+	// promocodeDescCode is the schema descriptor for code field.
+	promocodeDescCode := promocodeFields[0].Descriptor()
+	// promocode.CodeValidator is a validator for the "code" field. It is called by the builders before save.
+	promocode.CodeValidator = func() func(string) error {
+		validators := promocodeDescCode.Validators
+		fns := [...]func(string) error{
+			validators[0].(func(string) error),
+			validators[1].(func(string) error),
+		}
+		return func(code string) error {
+			for _, fn := range fns {
+				if err := fn(code); err != nil {
+					return err
+				}
+			}
+			return nil
+		}
+	}()
+	// promocodeDescBonusAmount is the schema descriptor for bonus_amount field.
+	promocodeDescBonusAmount := promocodeFields[1].Descriptor()
+	// promocode.DefaultBonusAmount holds the default value on creation for the bonus_amount field.
+	promocode.DefaultBonusAmount = promocodeDescBonusAmount.Default.(float64)
+	// promocodeDescMaxUses is the schema descriptor for max_uses field.
+	promocodeDescMaxUses := promocodeFields[2].Descriptor()
+	// promocode.DefaultMaxUses holds the default value on creation for the max_uses field.
+	promocode.DefaultMaxUses = promocodeDescMaxUses.Default.(int)
+	// promocodeDescUsedCount is the schema descriptor for used_count field.
+	promocodeDescUsedCount := promocodeFields[3].Descriptor()
+	// promocode.DefaultUsedCount holds the default value on creation for the used_count field.
+	promocode.DefaultUsedCount = promocodeDescUsedCount.Default.(int)
+	// promocodeDescStatus is the schema descriptor for status field.
+	promocodeDescStatus := promocodeFields[4].Descriptor()
+	// promocode.DefaultStatus holds the default value on creation for the status field.
+	promocode.DefaultStatus = promocodeDescStatus.Default.(string)
+	// promocode.StatusValidator is a validator for the "status" field. It is called by the builders before save.
+	promocode.StatusValidator = promocodeDescStatus.Validators[0].(func(string) error)
+	// promocodeDescCreatedAt is the schema descriptor for created_at field.
+	promocodeDescCreatedAt := promocodeFields[7].Descriptor()
+	// promocode.DefaultCreatedAt holds the default value on creation for the created_at field.
+	promocode.DefaultCreatedAt = promocodeDescCreatedAt.Default.(func() time.Time)
+	// promocodeDescUpdatedAt is the schema descriptor for updated_at field.
+	promocodeDescUpdatedAt := promocodeFields[8].Descriptor()
+	// promocode.DefaultUpdatedAt holds the default value on creation for the updated_at field.
+	promocode.DefaultUpdatedAt = promocodeDescUpdatedAt.Default.(func() time.Time)
+	// promocode.UpdateDefaultUpdatedAt holds the default value on update for the updated_at field.
+	promocode.UpdateDefaultUpdatedAt = promocodeDescUpdatedAt.UpdateDefault.(func() time.Time)
+	promocodeusageFields := schema.PromoCodeUsage{}.Fields()
+	_ = promocodeusageFields
+	// promocodeusageDescUsedAt is the schema descriptor for used_at field.
+	promocodeusageDescUsedAt := promocodeusageFields[3].Descriptor()
+	// promocodeusage.DefaultUsedAt holds the default value on creation for the used_at field.
+	promocodeusage.DefaultUsedAt = promocodeusageDescUsedAt.Default.(func() time.Time)
 	proxyMixin := schema.Proxy{}.Mixin()
 	proxyMixinHooks1 := proxyMixin[1].Hooks()
 	proxy.Hooks[0] = proxyMixinHooks1[0]

backend/ent/schema/promo_code.go

@@ -0,0 +1,87 @@
+package schema
+
+import (
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/service"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/entsql"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// PromoCode holds the schema definition for the PromoCode entity.
+//
+// 注册优惠码：用户注册时使用，可获得赠送余额
+// 与 RedeemCode 不同，PromoCode 支持多次使用（有使用次数限制）
+//
+// 删除策略：硬删除
+type PromoCode struct {
+	ent.Schema
+}
+
+func (PromoCode) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		entsql.Annotation{Table: "promo_codes"},
+	}
+}
+
+func (PromoCode) Fields() []ent.Field {
+	return []ent.Field{
+		field.String("code").
+			MaxLen(32).
+			NotEmpty().
+			Unique().
+			Comment("优惠码"),
+		field.Float("bonus_amount").
+			SchemaType(map[string]string{dialect.Postgres: "decimal(20,8)"}).
+			Default(0).
+			Comment("赠送余额金额"),
+		field.Int("max_uses").
+			Default(0).
+			Comment("最大使用次数，0表示无限制"),
+		field.Int("used_count").
+			Default(0).
+			Comment("已使用次数"),
+		field.String("status").
+			MaxLen(20).
+			Default(service.PromoCodeStatusActive).
+			Comment("状态: active, disabled"),
+		field.Time("expires_at").
+			Optional().
+			Nillable().
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}).
+			Comment("过期时间，null表示永不过期"),
+		field.String("notes").
+			Optional().
+			Nillable().
+			SchemaType(map[string]string{dialect.Postgres: "text"}).
+			Comment("备注"),
+		field.Time("created_at").
+			Immutable().
+			Default(time.Now).
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
+		field.Time("updated_at").
+			Default(time.Now).
+			UpdateDefault(time.Now).
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}),
+	}
+}
+
+func (PromoCode) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.To("usage_records", PromoCodeUsage.Type),
+	}
+}
+
+func (PromoCode) Indexes() []ent.Index {
+	return []ent.Index{
+		// code 字段已在 Fields() 中声明 Unique()，无需重复索引
+		index.Fields("status"),
+		index.Fields("expires_at"),
+	}
+}

backend/ent/schema/promo_code_usage.go

@@ -0,0 +1,66 @@
+package schema
+
+import (
+	"time"
+
+	"entgo.io/ent"
+	"entgo.io/ent/dialect"
+	"entgo.io/ent/dialect/entsql"
+	"entgo.io/ent/schema"
+	"entgo.io/ent/schema/edge"
+	"entgo.io/ent/schema/field"
+	"entgo.io/ent/schema/index"
+)
+
+// PromoCodeUsage holds the schema definition for the PromoCodeUsage entity.
+//
+// 优惠码使用记录：记录每个用户使用优惠码的情况
+type PromoCodeUsage struct {
+	ent.Schema
+}
+
+func (PromoCodeUsage) Annotations() []schema.Annotation {
+	return []schema.Annotation{
+		entsql.Annotation{Table: "promo_code_usages"},
+	}
+}
+
+func (PromoCodeUsage) Fields() []ent.Field {
+	return []ent.Field{
+		field.Int64("promo_code_id").
+			Comment("优惠码ID"),
+		field.Int64("user_id").
+			Comment("使用用户ID"),
+		field.Float("bonus_amount").
+			SchemaType(map[string]string{dialect.Postgres: "decimal(20,8)"}).
+			Comment("实际赠送金额"),
+		field.Time("used_at").
+			Default(time.Now).
+			SchemaType(map[string]string{dialect.Postgres: "timestamptz"}).
+			Comment("使用时间"),
+	}
+}
+
+func (PromoCodeUsage) Edges() []ent.Edge {
+	return []ent.Edge{
+		edge.From("promo_code", PromoCode.Type).
+			Ref("usage_records").
+			Field("promo_code_id").
+			Required().
+			Unique(),
+		edge.From("user", User.Type).
+			Ref("promo_code_usages").
+			Field("user_id").
+			Required().
+			Unique(),
+	}
+}
+
+func (PromoCodeUsage) Indexes() []ent.Index {
+	return []ent.Index{
+		index.Fields("promo_code_id"),
+		index.Fields("user_id"),
+		// 每个用户每个优惠码只能使用一次
+		index.Fields("promo_code_id", "user_id").Unique(),
+	}
+}

backend/ent/schema/user.go

@@ -74,6 +74,7 @@ func (User) Edges() []ent.Edge {
 			Through("user_allowed_groups", UserAllowedGroup.Type),
 		edge.To("usage_logs", UsageLog.Type),
 		edge.To("attribute_values", UserAttributeValue.Type),
+		edge.To("promo_code_usages", PromoCodeUsage.Type),
 	}
 }
 

backend/ent/setting_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -22,6 +23,7 @@ type SettingQuery struct {
 	order      []setting.OrderOption
 	inters     []Interceptor
 	predicates []predicate.Setting
+	modifiers  []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -343,6 +345,9 @@ func (_q *SettingQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Sett
 		nodes = append(nodes, node)
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -357,6 +362,9 @@ func (_q *SettingQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Sett
 
 func (_q *SettingQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -419,6 +427,9 @@ func (_q *SettingQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -436,6 +447,32 @@ func (_q *SettingQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *SettingQuery) ForUpdate(opts ...sql.LockOption) *SettingQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *SettingQuery) ForShare(opts ...sql.LockOption) *SettingQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // SettingGroupBy is the group-by builder for Setting entities.
 type SettingGroupBy struct {
 	selector

backend/ent/tx.go

@@ -22,6 +22,10 @@ type Tx struct {
 	AccountGroup *AccountGroupClient
 	// Group is the client for interacting with the Group builders.
 	Group *GroupClient
+	// PromoCode is the client for interacting with the PromoCode builders.
+	PromoCode *PromoCodeClient
+	// PromoCodeUsage is the client for interacting with the PromoCodeUsage builders.
+	PromoCodeUsage *PromoCodeUsageClient
 	// Proxy is the client for interacting with the Proxy builders.
 	Proxy *ProxyClient
 	// RedeemCode is the client for interacting with the RedeemCode builders.
@@ -175,6 +179,8 @@ func (tx *Tx) init() {
 	tx.Account = NewAccountClient(tx.config)
 	tx.AccountGroup = NewAccountGroupClient(tx.config)
 	tx.Group = NewGroupClient(tx.config)
+	tx.PromoCode = NewPromoCodeClient(tx.config)
+	tx.PromoCodeUsage = NewPromoCodeUsageClient(tx.config)
 	tx.Proxy = NewProxyClient(tx.config)
 	tx.RedeemCode = NewRedeemCodeClient(tx.config)
 	tx.Setting = NewSettingClient(tx.config)

backend/ent/usagelog_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -32,6 +33,7 @@ type UsageLogQuery struct {
 	withAccount      *AccountQuery
 	withGroup        *GroupQuery
 	withSubscription *UserSubscriptionQuery
+	modifiers        []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -531,6 +533,9 @@ func (_q *UsageLogQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*Usa
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -727,6 +732,9 @@ func (_q *UsageLogQuery) loadSubscription(ctx context.Context, query *UserSubscr
 
 func (_q *UsageLogQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -804,6 +812,9 @@ func (_q *UsageLogQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -821,6 +832,32 @@ func (_q *UsageLogQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *UsageLogQuery) ForUpdate(opts ...sql.LockOption) *UsageLogQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *UsageLogQuery) ForShare(opts ...sql.LockOption) *UsageLogQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // UsageLogGroupBy is the group-by builder for UsageLog entities.
 type UsageLogGroupBy struct {
 	selector

backend/ent/user.go

@@ -61,11 +61,13 @@ type UserEdges struct {
 	UsageLogs []*UsageLog `json:"usage_logs,omitempty"`
 	// AttributeValues holds the value of the attribute_values edge.
 	AttributeValues []*UserAttributeValue `json:"attribute_values,omitempty"`
+	// PromoCodeUsages holds the value of the promo_code_usages edge.
+	PromoCodeUsages []*PromoCodeUsage `json:"promo_code_usages,omitempty"`
 	// UserAllowedGroups holds the value of the user_allowed_groups edge.
 	UserAllowedGroups []*UserAllowedGroup `json:"user_allowed_groups,omitempty"`
 	// loadedTypes holds the information for reporting if a
 	// type was loaded (or requested) in eager-loading or not.
-	loadedTypes [8]bool
+	loadedTypes [9]bool
 }
 
 // APIKeysOrErr returns the APIKeys value or an error if the edge
@@ -131,10 +133,19 @@ func (e UserEdges) AttributeValuesOrErr() ([]*UserAttributeValue, error) {
 	return nil, &NotLoadedError{edge: "attribute_values"}
 }
 
+// PromoCodeUsagesOrErr returns the PromoCodeUsages value or an error if the edge
+// was not loaded in eager-loading.
+func (e UserEdges) PromoCodeUsagesOrErr() ([]*PromoCodeUsage, error) {
+	if e.loadedTypes[7] {
+		return e.PromoCodeUsages, nil
+	}
+	return nil, &NotLoadedError{edge: "promo_code_usages"}
+}
+
 // UserAllowedGroupsOrErr returns the UserAllowedGroups value or an error if the edge
 // was not loaded in eager-loading.
 func (e UserEdges) UserAllowedGroupsOrErr() ([]*UserAllowedGroup, error) {
-	if e.loadedTypes[7] {
+	if e.loadedTypes[8] {
 		return e.UserAllowedGroups, nil
 	}
 	return nil, &NotLoadedError{edge: "user_allowed_groups"}
@@ -289,6 +300,11 @@ func (_m *User) QueryAttributeValues() *UserAttributeValueQuery {
 	return NewUserClient(_m.config).QueryAttributeValues(_m)
 }
 
+// QueryPromoCodeUsages queries the "promo_code_usages" edge of the User entity.
+func (_m *User) QueryPromoCodeUsages() *PromoCodeUsageQuery {
+	return NewUserClient(_m.config).QueryPromoCodeUsages(_m)
+}
+
 // QueryUserAllowedGroups queries the "user_allowed_groups" edge of the User entity.
 func (_m *User) QueryUserAllowedGroups() *UserAllowedGroupQuery {
 	return NewUserClient(_m.config).QueryUserAllowedGroups(_m)

backend/ent/user/user.go

@@ -51,6 +51,8 @@ const (
 	EdgeUsageLogs = "usage_logs"
 	// EdgeAttributeValues holds the string denoting the attribute_values edge name in mutations.
 	EdgeAttributeValues = "attribute_values"
+	// EdgePromoCodeUsages holds the string denoting the promo_code_usages edge name in mutations.
+	EdgePromoCodeUsages = "promo_code_usages"
 	// EdgeUserAllowedGroups holds the string denoting the user_allowed_groups edge name in mutations.
 	EdgeUserAllowedGroups = "user_allowed_groups"
 	// Table holds the table name of the user in the database.
@@ -102,6 +104,13 @@ const (
 	AttributeValuesInverseTable = "user_attribute_values"
 	// AttributeValuesColumn is the table column denoting the attribute_values relation/edge.
 	AttributeValuesColumn = "user_id"
+	// PromoCodeUsagesTable is the table that holds the promo_code_usages relation/edge.
+	PromoCodeUsagesTable = "promo_code_usages"
+	// PromoCodeUsagesInverseTable is the table name for the PromoCodeUsage entity.
+	// It exists in this package in order to avoid circular dependency with the "promocodeusage" package.
+	PromoCodeUsagesInverseTable = "promo_code_usages"
+	// PromoCodeUsagesColumn is the table column denoting the promo_code_usages relation/edge.
+	PromoCodeUsagesColumn = "user_id"
 	// UserAllowedGroupsTable is the table that holds the user_allowed_groups relation/edge.
 	UserAllowedGroupsTable = "user_allowed_groups"
 	// UserAllowedGroupsInverseTable is the table name for the UserAllowedGroup entity.
@@ -342,6 +351,20 @@ func ByAttributeValues(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
 	}
 }
 
+// ByPromoCodeUsagesCount orders the results by promo_code_usages count.
+func ByPromoCodeUsagesCount(opts ...sql.OrderTermOption) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborsCount(s, newPromoCodeUsagesStep(), opts...)
+	}
+}
+
+// ByPromoCodeUsages orders the results by promo_code_usages terms.
+func ByPromoCodeUsages(term sql.OrderTerm, terms ...sql.OrderTerm) OrderOption {
+	return func(s *sql.Selector) {
+		sqlgraph.OrderByNeighborTerms(s, newPromoCodeUsagesStep(), append([]sql.OrderTerm{term}, terms...)...)
+	}
+}
+
 // ByUserAllowedGroupsCount orders the results by user_allowed_groups count.
 func ByUserAllowedGroupsCount(opts ...sql.OrderTermOption) OrderOption {
 	return func(s *sql.Selector) {
@@ -404,6 +427,13 @@ func newAttributeValuesStep() *sqlgraph.Step {
 		sqlgraph.Edge(sqlgraph.O2M, false, AttributeValuesTable, AttributeValuesColumn),
 	)
 }
+func newPromoCodeUsagesStep() *sqlgraph.Step {
+	return sqlgraph.NewStep(
+		sqlgraph.From(Table, FieldID),
+		sqlgraph.To(PromoCodeUsagesInverseTable, FieldID),
+		sqlgraph.Edge(sqlgraph.O2M, false, PromoCodeUsagesTable, PromoCodeUsagesColumn),
+	)
+}
 func newUserAllowedGroupsStep() *sqlgraph.Step {
 	return sqlgraph.NewStep(
 		sqlgraph.From(Table, FieldID),

backend/ent/user/where.go

@@ -871,6 +871,29 @@ func HasAttributeValuesWith(preds ...predicate.UserAttributeValue) predicate.Use
 	})
 }
 
+// HasPromoCodeUsages applies the HasEdge predicate on the "promo_code_usages" edge.
+func HasPromoCodeUsages() predicate.User {
+	return predicate.User(func(s *sql.Selector) {
+		step := sqlgraph.NewStep(
+			sqlgraph.From(Table, FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, PromoCodeUsagesTable, PromoCodeUsagesColumn),
+		)
+		sqlgraph.HasNeighbors(s, step)
+	})
+}
+
+// HasPromoCodeUsagesWith applies the HasEdge predicate on the "promo_code_usages" edge with a given conditions (other predicates).
+func HasPromoCodeUsagesWith(preds ...predicate.PromoCodeUsage) predicate.User {
+	return predicate.User(func(s *sql.Selector) {
+		step := newPromoCodeUsagesStep()
+		sqlgraph.HasNeighborsWith(s, step, func(s *sql.Selector) {
+			for _, p := range preds {
+				p(s)
+			}
+		})
+	})
+}
+
 // HasUserAllowedGroups applies the HasEdge predicate on the "user_allowed_groups" edge.
 func HasUserAllowedGroups() predicate.User {
 	return predicate.User(func(s *sql.Selector) {

backend/ent/user_create.go

@@ -13,6 +13,7 @@ import (
 	"entgo.io/ent/schema/field"
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/usagelog"
 	"github.com/Wei-Shaw/sub2api/ent/user"
@@ -271,6 +272,21 @@ func (_c *UserCreate) AddAttributeValues(v ...*UserAttributeValue) *UserCreate {
 	return _c.AddAttributeValueIDs(ids...)
 }
 
+// AddPromoCodeUsageIDs adds the "promo_code_usages" edge to the PromoCodeUsage entity by IDs.
+func (_c *UserCreate) AddPromoCodeUsageIDs(ids ...int64) *UserCreate {
+	_c.mutation.AddPromoCodeUsageIDs(ids...)
+	return _c
+}
+
+// AddPromoCodeUsages adds the "promo_code_usages" edges to the PromoCodeUsage entity.
+func (_c *UserCreate) AddPromoCodeUsages(v ...*PromoCodeUsage) *UserCreate {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _c.AddPromoCodeUsageIDs(ids...)
+}
+
 // Mutation returns the UserMutation object of the builder.
 func (_c *UserCreate) Mutation() *UserMutation {
 	return _c.mutation
@@ -593,6 +609,22 @@ func (_c *UserCreate) createSpec() (*User, *sqlgraph.CreateSpec) {
 		}
 		_spec.Edges = append(_spec.Edges, edge)
 	}
+	if nodes := _c.mutation.PromoCodeUsagesIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   user.PromoCodeUsagesTable,
+			Columns: []string{user.PromoCodeUsagesColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges = append(_spec.Edges, edge)
+	}
 	return _node, _spec
 }
 

backend/ent/user_query.go

@@ -9,12 +9,14 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
 	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/usagelog"
 	"github.com/Wei-Shaw/sub2api/ent/user"
@@ -37,7 +39,9 @@ type UserQuery struct {
 	withAllowedGroups         *GroupQuery
 	withUsageLogs             *UsageLogQuery
 	withAttributeValues       *UserAttributeValueQuery
+	withPromoCodeUsages       *PromoCodeUsageQuery
 	withUserAllowedGroups     *UserAllowedGroupQuery
+	modifiers                 []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -228,6 +232,28 @@ func (_q *UserQuery) QueryAttributeValues() *UserAttributeValueQuery {
 	return query
 }
 
+// QueryPromoCodeUsages chains the current query on the "promo_code_usages" edge.
+func (_q *UserQuery) QueryPromoCodeUsages() *PromoCodeUsageQuery {
+	query := (&PromoCodeUsageClient{config: _q.config}).Query()
+	query.path = func(ctx context.Context) (fromU *sql.Selector, err error) {
+		if err := _q.prepareQuery(ctx); err != nil {
+			return nil, err
+		}
+		selector := _q.sqlQuery(ctx)
+		if err := selector.Err(); err != nil {
+			return nil, err
+		}
+		step := sqlgraph.NewStep(
+			sqlgraph.From(user.Table, user.FieldID, selector),
+			sqlgraph.To(promocodeusage.Table, promocodeusage.FieldID),
+			sqlgraph.Edge(sqlgraph.O2M, false, user.PromoCodeUsagesTable, user.PromoCodeUsagesColumn),
+		)
+		fromU = sqlgraph.SetNeighbors(_q.driver.Dialect(), step)
+		return fromU, nil
+	}
+	return query
+}
+
 // QueryUserAllowedGroups chains the current query on the "user_allowed_groups" edge.
 func (_q *UserQuery) QueryUserAllowedGroups() *UserAllowedGroupQuery {
 	query := (&UserAllowedGroupClient{config: _q.config}).Query()
@@ -449,6 +475,7 @@ func (_q *UserQuery) Clone() *UserQuery {
 		withAllowedGroups:         _q.withAllowedGroups.Clone(),
 		withUsageLogs:             _q.withUsageLogs.Clone(),
 		withAttributeValues:       _q.withAttributeValues.Clone(),
+		withPromoCodeUsages:       _q.withPromoCodeUsages.Clone(),
 		withUserAllowedGroups:     _q.withUserAllowedGroups.Clone(),
 		// clone intermediate query.
 		sql:  _q.sql.Clone(),
@@ -533,6 +560,17 @@ func (_q *UserQuery) WithAttributeValues(opts ...func(*UserAttributeValueQuery))
 	return _q
 }
 
+// WithPromoCodeUsages tells the query-builder to eager-load the nodes that are connected to
+// the "promo_code_usages" edge. The optional arguments are used to configure the query builder of the edge.
+func (_q *UserQuery) WithPromoCodeUsages(opts ...func(*PromoCodeUsageQuery)) *UserQuery {
+	query := (&PromoCodeUsageClient{config: _q.config}).Query()
+	for _, opt := range opts {
+		opt(query)
+	}
+	_q.withPromoCodeUsages = query
+	return _q
+}
+
 // WithUserAllowedGroups tells the query-builder to eager-load the nodes that are connected to
 // the "user_allowed_groups" edge. The optional arguments are used to configure the query builder of the edge.
 func (_q *UserQuery) WithUserAllowedGroups(opts ...func(*UserAllowedGroupQuery)) *UserQuery {
@@ -622,7 +660,7 @@ func (_q *UserQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*User, e
 	var (
 		nodes       = []*User{}
 		_spec       = _q.querySpec()
-		loadedTypes = [8]bool{
+		loadedTypes = [9]bool{
 			_q.withAPIKeys != nil,
 			_q.withRedeemCodes != nil,
 			_q.withSubscriptions != nil,
@@ -630,6 +668,7 @@ func (_q *UserQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*User, e
 			_q.withAllowedGroups != nil,
 			_q.withUsageLogs != nil,
 			_q.withAttributeValues != nil,
+			_q.withPromoCodeUsages != nil,
 			_q.withUserAllowedGroups != nil,
 		}
 	)
@@ -642,6 +681,9 @@ func (_q *UserQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*User, e
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -702,6 +744,13 @@ func (_q *UserQuery) sqlAll(ctx context.Context, hooks ...queryHook) ([]*User, e
 			return nil, err
 		}
 	}
+	if query := _q.withPromoCodeUsages; query != nil {
+		if err := _q.loadPromoCodeUsages(ctx, query, nodes,
+			func(n *User) { n.Edges.PromoCodeUsages = []*PromoCodeUsage{} },
+			func(n *User, e *PromoCodeUsage) { n.Edges.PromoCodeUsages = append(n.Edges.PromoCodeUsages, e) }); err != nil {
+			return nil, err
+		}
+	}
 	if query := _q.withUserAllowedGroups; query != nil {
 		if err := _q.loadUserAllowedGroups(ctx, query, nodes,
 			func(n *User) { n.Edges.UserAllowedGroups = []*UserAllowedGroup{} },
@@ -959,6 +1008,36 @@ func (_q *UserQuery) loadAttributeValues(ctx context.Context, query *UserAttribu
 	}
 	return nil
 }
+func (_q *UserQuery) loadPromoCodeUsages(ctx context.Context, query *PromoCodeUsageQuery, nodes []*User, init func(*User), assign func(*User, *PromoCodeUsage)) error {
+	fks := make([]driver.Value, 0, len(nodes))
+	nodeids := make(map[int64]*User)
+	for i := range nodes {
+		fks = append(fks, nodes[i].ID)
+		nodeids[nodes[i].ID] = nodes[i]
+		if init != nil {
+			init(nodes[i])
+		}
+	}
+	if len(query.ctx.Fields) > 0 {
+		query.ctx.AppendFieldOnce(promocodeusage.FieldUserID)
+	}
+	query.Where(predicate.PromoCodeUsage(func(s *sql.Selector) {
+		s.Where(sql.InValues(s.C(user.PromoCodeUsagesColumn), fks...))
+	}))
+	neighbors, err := query.All(ctx)
+	if err != nil {
+		return err
+	}
+	for _, n := range neighbors {
+		fk := n.UserID
+		node, ok := nodeids[fk]
+		if !ok {
+			return fmt.Errorf(`unexpected referenced foreign-key "user_id" returned %v for node %v`, fk, n.ID)
+		}
+		assign(node, n)
+	}
+	return nil
+}
 func (_q *UserQuery) loadUserAllowedGroups(ctx context.Context, query *UserAllowedGroupQuery, nodes []*User, init func(*User), assign func(*User, *UserAllowedGroup)) error {
 	fks := make([]driver.Value, 0, len(nodes))
 	nodeids := make(map[int64]*User)
@@ -992,6 +1071,9 @@ func (_q *UserQuery) loadUserAllowedGroups(ctx context.Context, query *UserAllow
 
 func (_q *UserQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -1054,6 +1136,9 @@ func (_q *UserQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -1071,6 +1156,32 @@ func (_q *UserQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *UserQuery) ForUpdate(opts ...sql.LockOption) *UserQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *UserQuery) ForShare(opts ...sql.LockOption) *UserQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // UserGroupBy is the group-by builder for User entities.
 type UserGroupBy struct {
 	selector

backend/ent/user_update.go

@@ -14,6 +14,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/ent/apikey"
 	"github.com/Wei-Shaw/sub2api/ent/group"
 	"github.com/Wei-Shaw/sub2api/ent/predicate"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
 	"github.com/Wei-Shaw/sub2api/ent/redeemcode"
 	"github.com/Wei-Shaw/sub2api/ent/usagelog"
 	"github.com/Wei-Shaw/sub2api/ent/user"
@@ -291,6 +292,21 @@ func (_u *UserUpdate) AddAttributeValues(v ...*UserAttributeValue) *UserUpdate {
 	return _u.AddAttributeValueIDs(ids...)
 }
 
+// AddPromoCodeUsageIDs adds the "promo_code_usages" edge to the PromoCodeUsage entity by IDs.
+func (_u *UserUpdate) AddPromoCodeUsageIDs(ids ...int64) *UserUpdate {
+	_u.mutation.AddPromoCodeUsageIDs(ids...)
+	return _u
+}
+
+// AddPromoCodeUsages adds the "promo_code_usages" edges to the PromoCodeUsage entity.
+func (_u *UserUpdate) AddPromoCodeUsages(v ...*PromoCodeUsage) *UserUpdate {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddPromoCodeUsageIDs(ids...)
+}
+
 // Mutation returns the UserMutation object of the builder.
 func (_u *UserUpdate) Mutation() *UserMutation {
 	return _u.mutation
@@ -443,6 +459,27 @@ func (_u *UserUpdate) RemoveAttributeValues(v ...*UserAttributeValue) *UserUpdat
 	return _u.RemoveAttributeValueIDs(ids...)
 }
 
+// ClearPromoCodeUsages clears all "promo_code_usages" edges to the PromoCodeUsage entity.
+func (_u *UserUpdate) ClearPromoCodeUsages() *UserUpdate {
+	_u.mutation.ClearPromoCodeUsages()
+	return _u
+}
+
+// RemovePromoCodeUsageIDs removes the "promo_code_usages" edge to PromoCodeUsage entities by IDs.
+func (_u *UserUpdate) RemovePromoCodeUsageIDs(ids ...int64) *UserUpdate {
+	_u.mutation.RemovePromoCodeUsageIDs(ids...)
+	return _u
+}
+
+// RemovePromoCodeUsages removes "promo_code_usages" edges to PromoCodeUsage entities.
+func (_u *UserUpdate) RemovePromoCodeUsages(v ...*PromoCodeUsage) *UserUpdate {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemovePromoCodeUsageIDs(ids...)
+}
+
 // Save executes the query and returns the number of nodes affected by the update operation.
 func (_u *UserUpdate) Save(ctx context.Context) (int, error) {
 	if err := _u.defaults(); err != nil {
@@ -893,6 +930,51 @@ func (_u *UserUpdate) sqlSave(ctx context.Context) (_node int, err error) {
 		}
 		_spec.Edges.Add = append(_spec.Edges.Add, edge)
 	}
+	if _u.mutation.PromoCodeUsagesCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   user.PromoCodeUsagesTable,
+			Columns: []string{user.PromoCodeUsagesColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedPromoCodeUsagesIDs(); len(nodes) > 0 && !_u.mutation.PromoCodeUsagesCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   user.PromoCodeUsagesTable,
+			Columns: []string{user.PromoCodeUsagesColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.PromoCodeUsagesIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   user.PromoCodeUsagesTable,
+			Columns: []string{user.PromoCodeUsagesColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
 	if _node, err = sqlgraph.UpdateNodes(ctx, _u.driver, _spec); err != nil {
 		if _, ok := err.(*sqlgraph.NotFoundError); ok {
 			err = &NotFoundError{user.Label}
@@ -1170,6 +1252,21 @@ func (_u *UserUpdateOne) AddAttributeValues(v ...*UserAttributeValue) *UserUpdat
 	return _u.AddAttributeValueIDs(ids...)
 }
 
+// AddPromoCodeUsageIDs adds the "promo_code_usages" edge to the PromoCodeUsage entity by IDs.
+func (_u *UserUpdateOne) AddPromoCodeUsageIDs(ids ...int64) *UserUpdateOne {
+	_u.mutation.AddPromoCodeUsageIDs(ids...)
+	return _u
+}
+
+// AddPromoCodeUsages adds the "promo_code_usages" edges to the PromoCodeUsage entity.
+func (_u *UserUpdateOne) AddPromoCodeUsages(v ...*PromoCodeUsage) *UserUpdateOne {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.AddPromoCodeUsageIDs(ids...)
+}
+
 // Mutation returns the UserMutation object of the builder.
 func (_u *UserUpdateOne) Mutation() *UserMutation {
 	return _u.mutation
@@ -1322,6 +1419,27 @@ func (_u *UserUpdateOne) RemoveAttributeValues(v ...*UserAttributeValue) *UserUp
 	return _u.RemoveAttributeValueIDs(ids...)
 }
 
+// ClearPromoCodeUsages clears all "promo_code_usages" edges to the PromoCodeUsage entity.
+func (_u *UserUpdateOne) ClearPromoCodeUsages() *UserUpdateOne {
+	_u.mutation.ClearPromoCodeUsages()
+	return _u
+}
+
+// RemovePromoCodeUsageIDs removes the "promo_code_usages" edge to PromoCodeUsage entities by IDs.
+func (_u *UserUpdateOne) RemovePromoCodeUsageIDs(ids ...int64) *UserUpdateOne {
+	_u.mutation.RemovePromoCodeUsageIDs(ids...)
+	return _u
+}
+
+// RemovePromoCodeUsages removes "promo_code_usages" edges to PromoCodeUsage entities.
+func (_u *UserUpdateOne) RemovePromoCodeUsages(v ...*PromoCodeUsage) *UserUpdateOne {
+	ids := make([]int64, len(v))
+	for i := range v {
+		ids[i] = v[i].ID
+	}
+	return _u.RemovePromoCodeUsageIDs(ids...)
+}
+
 // Where appends a list predicates to the UserUpdate builder.
 func (_u *UserUpdateOne) Where(ps ...predicate.User) *UserUpdateOne {
 	_u.mutation.Where(ps...)
@@ -1802,6 +1920,51 @@ func (_u *UserUpdateOne) sqlSave(ctx context.Context) (_node *User, err error) {
 		}
 		_spec.Edges.Add = append(_spec.Edges.Add, edge)
 	}
+	if _u.mutation.PromoCodeUsagesCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   user.PromoCodeUsagesTable,
+			Columns: []string{user.PromoCodeUsagesColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.RemovedPromoCodeUsagesIDs(); len(nodes) > 0 && !_u.mutation.PromoCodeUsagesCleared() {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   user.PromoCodeUsagesTable,
+			Columns: []string{user.PromoCodeUsagesColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Clear = append(_spec.Edges.Clear, edge)
+	}
+	if nodes := _u.mutation.PromoCodeUsagesIDs(); len(nodes) > 0 {
+		edge := &sqlgraph.EdgeSpec{
+			Rel:     sqlgraph.O2M,
+			Inverse: false,
+			Table:   user.PromoCodeUsagesTable,
+			Columns: []string{user.PromoCodeUsagesColumn},
+			Bidi:    false,
+			Target: &sqlgraph.EdgeTarget{
+				IDSpec: sqlgraph.NewFieldSpec(promocodeusage.FieldID, field.TypeInt64),
+			},
+		}
+		for _, k := range nodes {
+			edge.Target.Nodes = append(edge.Target.Nodes, k)
+		}
+		_spec.Edges.Add = append(_spec.Edges.Add, edge)
+	}
 	_node = &User{config: _u.config}
 	_spec.Assign = _node.assignValues
 	_spec.ScanValues = _node.scanValues

backend/ent/userallowedgroup_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"github.com/Wei-Shaw/sub2api/ent/group"
@@ -25,6 +26,7 @@ type UserAllowedGroupQuery struct {
 	predicates []predicate.UserAllowedGroup
 	withUser   *UserQuery
 	withGroup  *GroupQuery
+	modifiers  []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -347,6 +349,9 @@ func (_q *UserAllowedGroupQuery) sqlAll(ctx context.Context, hooks ...queryHook)
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -432,6 +437,9 @@ func (_q *UserAllowedGroupQuery) loadGroup(ctx context.Context, query *GroupQuer
 
 func (_q *UserAllowedGroupQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Unique = false
 	_spec.Node.Columns = nil
 	return sqlgraph.CountNodes(ctx, _q.driver, _spec)
@@ -495,6 +503,9 @@ func (_q *UserAllowedGroupQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -512,6 +523,32 @@ func (_q *UserAllowedGroupQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *UserAllowedGroupQuery) ForUpdate(opts ...sql.LockOption) *UserAllowedGroupQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *UserAllowedGroupQuery) ForShare(opts ...sql.LockOption) *UserAllowedGroupQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // UserAllowedGroupGroupBy is the group-by builder for UserAllowedGroup entities.
 type UserAllowedGroupGroupBy struct {
 	selector

backend/ent/userattributedefinition_query.go

@@ -9,6 +9,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -25,6 +26,7 @@ type UserAttributeDefinitionQuery struct {
 	inters     []Interceptor
 	predicates []predicate.UserAttributeDefinition
 	withValues *UserAttributeValueQuery
+	modifiers  []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -384,6 +386,9 @@ func (_q *UserAttributeDefinitionQuery) sqlAll(ctx context.Context, hooks ...que
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -436,6 +441,9 @@ func (_q *UserAttributeDefinitionQuery) loadValues(ctx context.Context, query *U
 
 func (_q *UserAttributeDefinitionQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -498,6 +506,9 @@ func (_q *UserAttributeDefinitionQuery) sqlQuery(ctx context.Context) *sql.Selec
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -515,6 +526,32 @@ func (_q *UserAttributeDefinitionQuery) sqlQuery(ctx context.Context) *sql.Selec
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *UserAttributeDefinitionQuery) ForUpdate(opts ...sql.LockOption) *UserAttributeDefinitionQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *UserAttributeDefinitionQuery) ForShare(opts ...sql.LockOption) *UserAttributeDefinitionQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // UserAttributeDefinitionGroupBy is the group-by builder for UserAttributeDefinition entities.
 type UserAttributeDefinitionGroupBy struct {
 	selector

backend/ent/userattributevalue_query.go

@@ -8,6 +8,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -26,6 +27,7 @@ type UserAttributeValueQuery struct {
 	predicates     []predicate.UserAttributeValue
 	withUser       *UserQuery
 	withDefinition *UserAttributeDefinitionQuery
+	modifiers      []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -420,6 +422,9 @@ func (_q *UserAttributeValueQuery) sqlAll(ctx context.Context, hooks ...queryHoo
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -505,6 +510,9 @@ func (_q *UserAttributeValueQuery) loadDefinition(ctx context.Context, query *Us
 
 func (_q *UserAttributeValueQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -573,6 +581,9 @@ func (_q *UserAttributeValueQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -590,6 +601,32 @@ func (_q *UserAttributeValueQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *UserAttributeValueQuery) ForUpdate(opts ...sql.LockOption) *UserAttributeValueQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *UserAttributeValueQuery) ForShare(opts ...sql.LockOption) *UserAttributeValueQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // UserAttributeValueGroupBy is the group-by builder for UserAttributeValue entities.
 type UserAttributeValueGroupBy struct {
 	selector

backend/ent/usersubscription_query.go

@@ -9,6 +9,7 @@ import (
 	"math"
 
 	"entgo.io/ent"
+	"entgo.io/ent/dialect"
 	"entgo.io/ent/dialect/sql"
 	"entgo.io/ent/dialect/sql/sqlgraph"
 	"entgo.io/ent/schema/field"
@@ -30,6 +31,7 @@ type UserSubscriptionQuery struct {
 	withGroup          *GroupQuery
 	withAssignedByUser *UserQuery
 	withUsageLogs      *UsageLogQuery
+	modifiers          []func(*sql.Selector)
 	// intermediate query (i.e. traversal path).
 	sql  *sql.Selector
 	path func(context.Context) (*sql.Selector, error)
@@ -494,6 +496,9 @@ func (_q *UserSubscriptionQuery) sqlAll(ctx context.Context, hooks ...queryHook)
 		node.Edges.loadedTypes = loadedTypes
 		return node.assignValues(columns, values)
 	}
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	for i := range hooks {
 		hooks[i](ctx, _spec)
 	}
@@ -657,6 +662,9 @@ func (_q *UserSubscriptionQuery) loadUsageLogs(ctx context.Context, query *Usage
 
 func (_q *UserSubscriptionQuery) sqlCount(ctx context.Context) (int, error) {
 	_spec := _q.querySpec()
+	if len(_q.modifiers) > 0 {
+		_spec.Modifiers = _q.modifiers
+	}
 	_spec.Node.Columns = _q.ctx.Fields
 	if len(_q.ctx.Fields) > 0 {
 		_spec.Unique = _q.ctx.Unique != nil && *_q.ctx.Unique
@@ -728,6 +736,9 @@ func (_q *UserSubscriptionQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	if _q.ctx.Unique != nil && *_q.ctx.Unique {
 		selector.Distinct()
 	}
+	for _, m := range _q.modifiers {
+		m(selector)
+	}
 	for _, p := range _q.predicates {
 		p(selector)
 	}
@@ -745,6 +756,32 @@ func (_q *UserSubscriptionQuery) sqlQuery(ctx context.Context) *sql.Selector {
 	return selector
 }
 
+// ForUpdate locks the selected rows against concurrent updates, and prevent them from being
+// updated, deleted or "selected ... for update" by other sessions, until the transaction is
+// either committed or rolled-back.
+func (_q *UserSubscriptionQuery) ForUpdate(opts ...sql.LockOption) *UserSubscriptionQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForUpdate(opts...)
+	})
+	return _q
+}
+
+// ForShare behaves similarly to ForUpdate, except that it acquires a shared mode lock
+// on any rows that are read. Other sessions can read the rows, but cannot modify them
+// until your transaction commits.
+func (_q *UserSubscriptionQuery) ForShare(opts ...sql.LockOption) *UserSubscriptionQuery {
+	if _q.driver.Dialect() == dialect.Postgres {
+		_q.Unique(false)
+	}
+	_q.modifiers = append(_q.modifiers, func(s *sql.Selector) {
+		s.ForShare(opts...)
+	})
+	return _q
+}
+
 // UserSubscriptionGroupBy is the group-by builder for UserSubscription entities.
 type UserSubscriptionGroupBy struct {
 	selector

backend/internal/config/config.go

@@ -294,6 +294,13 @@ type DatabaseConfig struct {
 }
 
 func (d *DatabaseConfig) DSN() string {
+	// 当密码为空时不包含 password 参数，避免 libpq 解析错误
+	if d.Password == "" {
+		return fmt.Sprintf(
+			"host=%s port=%d user=%s dbname=%s sslmode=%s",
+			d.Host, d.Port, d.User, d.DBName, d.SSLMode,
+		)
+	}
 	return fmt.Sprintf(
 		"host=%s port=%d user=%s password=%s dbname=%s sslmode=%s",
 		d.Host, d.Port, d.User, d.Password, d.DBName, d.SSLMode,
@@ -305,6 +312,13 @@ func (d *DatabaseConfig) DSNWithTimezone(tz string) string {
 	if tz == "" {
 		tz = "Asia/Shanghai"
 	}
+	// 当密码为空时不包含 password 参数，避免 libpq 解析错误
+	if d.Password == "" {
+		return fmt.Sprintf(
+			"host=%s port=%d user=%s dbname=%s sslmode=%s TimeZone=%s",
+			d.Host, d.Port, d.User, d.DBName, d.SSLMode, tz,
+		)
+	}
 	return fmt.Sprintf(
 		"host=%s port=%d user=%s password=%s dbname=%s sslmode=%s TimeZone=%s",
 		d.Host, d.Port, d.User, d.Password, d.DBName, d.SSLMode, tz,
@@ -538,6 +552,22 @@ func setDefaults() {
 	// Turnstile
 	viper.SetDefault("turnstile.required", false)
 
+	// LinuxDo Connect OAuth 登录（终端用户 SSO）
+	viper.SetDefault("linuxdo_connect.enabled", false)
+	viper.SetDefault("linuxdo_connect.client_id", "")
+	viper.SetDefault("linuxdo_connect.client_secret", "")
+	viper.SetDefault("linuxdo_connect.authorize_url", "https://connect.linux.do/oauth2/authorize")
+	viper.SetDefault("linuxdo_connect.token_url", "https://connect.linux.do/oauth2/token")
+	viper.SetDefault("linuxdo_connect.userinfo_url", "https://connect.linux.do/api/user")
+	viper.SetDefault("linuxdo_connect.scopes", "user")
+	viper.SetDefault("linuxdo_connect.redirect_url", "")
+	viper.SetDefault("linuxdo_connect.frontend_redirect_url", "/auth/linuxdo/callback")
+	viper.SetDefault("linuxdo_connect.token_auth_method", "client_secret_post")
+	viper.SetDefault("linuxdo_connect.use_pkce", false)
+	viper.SetDefault("linuxdo_connect.userinfo_email_path", "")
+	viper.SetDefault("linuxdo_connect.userinfo_id_path", "")
+	viper.SetDefault("linuxdo_connect.userinfo_username_path", "")
+
 	// Database
 	viper.SetDefault("database.host", "localhost")
 	viper.SetDefault("database.port", 5432)
@@ -659,6 +689,61 @@ func (c *Config) Validate() error {
 	if c.Security.CSP.Enabled && strings.TrimSpace(c.Security.CSP.Policy) == "" {
 		return fmt.Errorf("security.csp.policy is required when CSP is enabled")
 	}
+	if c.LinuxDo.Enabled {
+		if strings.TrimSpace(c.LinuxDo.ClientID) == "" {
+			return fmt.Errorf("linuxdo_connect.client_id is required when linuxdo_connect.enabled=true")
+		}
+		if strings.TrimSpace(c.LinuxDo.AuthorizeURL) == "" {
+			return fmt.Errorf("linuxdo_connect.authorize_url is required when linuxdo_connect.enabled=true")
+		}
+		if strings.TrimSpace(c.LinuxDo.TokenURL) == "" {
+			return fmt.Errorf("linuxdo_connect.token_url is required when linuxdo_connect.enabled=true")
+		}
+		if strings.TrimSpace(c.LinuxDo.UserInfoURL) == "" {
+			return fmt.Errorf("linuxdo_connect.userinfo_url is required when linuxdo_connect.enabled=true")
+		}
+		if strings.TrimSpace(c.LinuxDo.RedirectURL) == "" {
+			return fmt.Errorf("linuxdo_connect.redirect_url is required when linuxdo_connect.enabled=true")
+		}
+		method := strings.ToLower(strings.TrimSpace(c.LinuxDo.TokenAuthMethod))
+		switch method {
+		case "", "client_secret_post", "client_secret_basic", "none":
+		default:
+			return fmt.Errorf("linuxdo_connect.token_auth_method must be one of: client_secret_post/client_secret_basic/none")
+		}
+		if method == "none" && !c.LinuxDo.UsePKCE {
+			return fmt.Errorf("linuxdo_connect.use_pkce must be true when linuxdo_connect.token_auth_method=none")
+		}
+		if (method == "" || method == "client_secret_post" || method == "client_secret_basic") &&
+			strings.TrimSpace(c.LinuxDo.ClientSecret) == "" {
+			return fmt.Errorf("linuxdo_connect.client_secret is required when linuxdo_connect.enabled=true and token_auth_method is client_secret_post/client_secret_basic")
+		}
+		if strings.TrimSpace(c.LinuxDo.FrontendRedirectURL) == "" {
+			return fmt.Errorf("linuxdo_connect.frontend_redirect_url is required when linuxdo_connect.enabled=true")
+		}
+
+		if err := ValidateAbsoluteHTTPURL(c.LinuxDo.AuthorizeURL); err != nil {
+			return fmt.Errorf("linuxdo_connect.authorize_url invalid: %w", err)
+		}
+		if err := ValidateAbsoluteHTTPURL(c.LinuxDo.TokenURL); err != nil {
+			return fmt.Errorf("linuxdo_connect.token_url invalid: %w", err)
+		}
+		if err := ValidateAbsoluteHTTPURL(c.LinuxDo.UserInfoURL); err != nil {
+			return fmt.Errorf("linuxdo_connect.userinfo_url invalid: %w", err)
+		}
+		if err := ValidateAbsoluteHTTPURL(c.LinuxDo.RedirectURL); err != nil {
+			return fmt.Errorf("linuxdo_connect.redirect_url invalid: %w", err)
+		}
+		if err := ValidateFrontendRedirectURL(c.LinuxDo.FrontendRedirectURL); err != nil {
+			return fmt.Errorf("linuxdo_connect.frontend_redirect_url invalid: %w", err)
+		}
+
+		warnIfInsecureURL("linuxdo_connect.authorize_url", c.LinuxDo.AuthorizeURL)
+		warnIfInsecureURL("linuxdo_connect.token_url", c.LinuxDo.TokenURL)
+		warnIfInsecureURL("linuxdo_connect.userinfo_url", c.LinuxDo.UserInfoURL)
+		warnIfInsecureURL("linuxdo_connect.redirect_url", c.LinuxDo.RedirectURL)
+		warnIfInsecureURL("linuxdo_connect.frontend_redirect_url", c.LinuxDo.FrontendRedirectURL)
+	}
 	if c.Billing.CircuitBreaker.Enabled {
 		if c.Billing.CircuitBreaker.FailureThreshold <= 0 {
 			return fmt.Errorf("billing.circuit_breaker.failure_threshold must be positive")
@@ -928,3 +1013,13 @@ func ValidateFrontendRedirectURL(raw string) error {
 func isHTTPScheme(scheme string) bool {
 	return strings.EqualFold(scheme, "http") || strings.EqualFold(scheme, "https")
 }
+
+func warnIfInsecureURL(field, raw string) {
+	u, err := url.Parse(strings.TrimSpace(raw))
+	if err != nil {
+		return
+	}
+	if strings.EqualFold(u.Scheme, "http") {
+		log.Printf("Warning: %s uses http scheme; use https in production to avoid token leakage.", field)
+	}
+}

backend/internal/handler/admin/promo_handler.go

@@ -0,0 +1,209 @@
+package admin
+
+import (
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/Wei-Shaw/sub2api/internal/handler/dto"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
+	"github.com/Wei-Shaw/sub2api/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+// PromoHandler handles admin promo code management
+type PromoHandler struct {
+	promoService *service.PromoService
+}
+
+// NewPromoHandler creates a new admin promo handler
+func NewPromoHandler(promoService *service.PromoService) *PromoHandler {
+	return &PromoHandler{
+		promoService: promoService,
+	}
+}
+
+// CreatePromoCodeRequest represents create promo code request
+type CreatePromoCodeRequest struct {
+	Code        string  `json:"code"`                                  // 可选，为空则自动生成
+	BonusAmount float64 `json:"bonus_amount" binding:"required,min=0"` // 赠送余额
+	MaxUses     int     `json:"max_uses" binding:"min=0"`              // 最大使用次数，0=无限
+	ExpiresAt   *int64  `json:"expires_at"`                            // 过期时间戳（秒）
+	Notes       string  `json:"notes"`                                 // 备注
+}
+
+// UpdatePromoCodeRequest represents update promo code request
+type UpdatePromoCodeRequest struct {
+	Code        *string  `json:"code"`
+	BonusAmount *float64 `json:"bonus_amount" binding:"omitempty,min=0"`
+	MaxUses     *int     `json:"max_uses" binding:"omitempty,min=0"`
+	Status      *string  `json:"status" binding:"omitempty,oneof=active disabled"`
+	ExpiresAt   *int64   `json:"expires_at"`
+	Notes       *string  `json:"notes"`
+}
+
+// List handles listing all promo codes with pagination
+// GET /api/v1/admin/promo-codes
+func (h *PromoHandler) List(c *gin.Context) {
+	page, pageSize := response.ParsePagination(c)
+	status := c.Query("status")
+	search := strings.TrimSpace(c.Query("search"))
+	if len(search) > 100 {
+		search = search[:100]
+	}
+
+	params := pagination.PaginationParams{
+		Page:     page,
+		PageSize: pageSize,
+	}
+
+	codes, paginationResult, err := h.promoService.List(c.Request.Context(), params, status, search)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	out := make([]dto.PromoCode, 0, len(codes))
+	for i := range codes {
+		out = append(out, *dto.PromoCodeFromService(&codes[i]))
+	}
+	response.Paginated(c, out, paginationResult.Total, page, pageSize)
+}
+
+// GetByID handles getting a promo code by ID
+// GET /api/v1/admin/promo-codes/:id
+func (h *PromoHandler) GetByID(c *gin.Context) {
+	codeID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid promo code ID")
+		return
+	}
+
+	code, err := h.promoService.GetByID(c.Request.Context(), codeID)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, dto.PromoCodeFromService(code))
+}
+
+// Create handles creating a new promo code
+// POST /api/v1/admin/promo-codes
+func (h *PromoHandler) Create(c *gin.Context) {
+	var req CreatePromoCodeRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	input := &service.CreatePromoCodeInput{
+		Code:        req.Code,
+		BonusAmount: req.BonusAmount,
+		MaxUses:     req.MaxUses,
+		Notes:       req.Notes,
+	}
+
+	if req.ExpiresAt != nil {
+		t := time.Unix(*req.ExpiresAt, 0)
+		input.ExpiresAt = &t
+	}
+
+	code, err := h.promoService.Create(c.Request.Context(), input)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, dto.PromoCodeFromService(code))
+}
+
+// Update handles updating a promo code
+// PUT /api/v1/admin/promo-codes/:id
+func (h *PromoHandler) Update(c *gin.Context) {
+	codeID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid promo code ID")
+		return
+	}
+
+	var req UpdatePromoCodeRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	input := &service.UpdatePromoCodeInput{
+		Code:        req.Code,
+		BonusAmount: req.BonusAmount,
+		MaxUses:     req.MaxUses,
+		Status:      req.Status,
+		Notes:       req.Notes,
+	}
+
+	if req.ExpiresAt != nil {
+		if *req.ExpiresAt == 0 {
+			// 0 表示清除过期时间
+			input.ExpiresAt = nil
+		} else {
+			t := time.Unix(*req.ExpiresAt, 0)
+			input.ExpiresAt = &t
+		}
+	}
+
+	code, err := h.promoService.Update(c.Request.Context(), codeID, input)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, dto.PromoCodeFromService(code))
+}
+
+// Delete handles deleting a promo code
+// DELETE /api/v1/admin/promo-codes/:id
+func (h *PromoHandler) Delete(c *gin.Context) {
+	codeID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid promo code ID")
+		return
+	}
+
+	err = h.promoService.Delete(c.Request.Context(), codeID)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	response.Success(c, gin.H{"message": "Promo code deleted successfully"})
+}
+
+// GetUsages handles getting usage records for a promo code
+// GET /api/v1/admin/promo-codes/:id/usages
+func (h *PromoHandler) GetUsages(c *gin.Context) {
+	codeID, err := strconv.ParseInt(c.Param("id"), 10, 64)
+	if err != nil {
+		response.BadRequest(c, "Invalid promo code ID")
+		return
+	}
+
+	page, pageSize := response.ParsePagination(c)
+	params := pagination.PaginationParams{
+		Page:     page,
+		PageSize: pageSize,
+	}
+
+	usages, paginationResult, err := h.promoService.ListUsages(c.Request.Context(), codeID, params)
+	if err != nil {
+		response.ErrorFrom(c, err)
+		return
+	}
+
+	out := make([]dto.PromoCodeUsage, 0, len(usages))
+	for i := range usages {
+		out = append(out, *dto.PromoCodeUsageFromService(&usages[i]))
+	}
+	response.Paginated(c, out, paginationResult.Total, page, pageSize)
+}

backend/internal/handler/admin/setting_handler.go

@@ -2,8 +2,10 @@ package admin
 
 import (
 	"log"
+	"strings"
 	"time"
 
+	"github.com/Wei-Shaw/sub2api/internal/config"
 	"github.com/Wei-Shaw/sub2api/internal/handler/dto"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/response"
 	"github.com/Wei-Shaw/sub2api/internal/server/middleware"
@@ -38,37 +40,42 @@ func (h *SettingHandler) GetSettings(c *gin.Context) {
 	}
 
 	response.Success(c, dto.SystemSettings{
-		RegistrationEnabled:          settings.RegistrationEnabled,
-		EmailVerifyEnabled:           settings.EmailVerifyEnabled,
-		SMTPHost:                     settings.SMTPHost,
-		SMTPPort:                     settings.SMTPPort,
-		SMTPUsername:                 settings.SMTPUsername,
-		SMTPPasswordConfigured:       settings.SMTPPasswordConfigured,
-		SMTPFrom:                     settings.SMTPFrom,
-		SMTPFromName:                 settings.SMTPFromName,
-		SMTPUseTLS:                   settings.SMTPUseTLS,
-		TurnstileEnabled:             settings.TurnstileEnabled,
-		TurnstileSiteKey:             settings.TurnstileSiteKey,
-		TurnstileSecretKeyConfigured: settings.TurnstileSecretKeyConfigured,
-		SiteName:                     settings.SiteName,
-		SiteLogo:                     settings.SiteLogo,
-		SiteSubtitle:                 settings.SiteSubtitle,
-		APIBaseURL:                   settings.APIBaseURL,
-		ContactInfo:                  settings.ContactInfo,
-		DocURL:                       settings.DocURL,
-		DefaultConcurrency:           settings.DefaultConcurrency,
-		DefaultBalance:               settings.DefaultBalance,
-		EnableModelFallback:          settings.EnableModelFallback,
-		FallbackModelAnthropic:       settings.FallbackModelAnthropic,
-		FallbackModelOpenAI:          settings.FallbackModelOpenAI,
-		FallbackModelGemini:          settings.FallbackModelGemini,
-		FallbackModelAntigravity:     settings.FallbackModelAntigravity,
-		EnableIdentityPatch:          settings.EnableIdentityPatch,
-		IdentityPatchPrompt:          settings.IdentityPatchPrompt,
-		OpsMonitoringEnabled:         settings.OpsMonitoringEnabled,
-		OpsRealtimeMonitoringEnabled: settings.OpsRealtimeMonitoringEnabled,
-		OpsQueryModeDefault:          settings.OpsQueryModeDefault,
-		OpsMetricsIntervalSeconds:    settings.OpsMetricsIntervalSeconds,
+		RegistrationEnabled:                  settings.RegistrationEnabled,
+		EmailVerifyEnabled:                   settings.EmailVerifyEnabled,
+		SMTPHost:                             settings.SMTPHost,
+		SMTPPort:                             settings.SMTPPort,
+		SMTPUsername:                         settings.SMTPUsername,
+		SMTPPasswordConfigured:               settings.SMTPPasswordConfigured,
+		SMTPFrom:                             settings.SMTPFrom,
+		SMTPFromName:                         settings.SMTPFromName,
+		SMTPUseTLS:                           settings.SMTPUseTLS,
+		TurnstileEnabled:                     settings.TurnstileEnabled,
+		TurnstileSiteKey:                     settings.TurnstileSiteKey,
+		TurnstileSecretKeyConfigured:         settings.TurnstileSecretKeyConfigured,
+		LinuxDoConnectEnabled:                settings.LinuxDoConnectEnabled,
+		LinuxDoConnectClientID:               settings.LinuxDoConnectClientID,
+		LinuxDoConnectClientSecretConfigured: settings.LinuxDoConnectClientSecretConfigured,
+		LinuxDoConnectRedirectURL:            settings.LinuxDoConnectRedirectURL,
+		SiteName:                             settings.SiteName,
+		SiteLogo:                             settings.SiteLogo,
+		SiteSubtitle:                         settings.SiteSubtitle,
+		APIBaseURL:                           settings.APIBaseURL,
+		ContactInfo:                          settings.ContactInfo,
+		DocURL:                               settings.DocURL,
+		HomeContent:                          settings.HomeContent,
+		DefaultConcurrency:                   settings.DefaultConcurrency,
+		DefaultBalance:                       settings.DefaultBalance,
+		EnableModelFallback:                  settings.EnableModelFallback,
+		FallbackModelAnthropic:               settings.FallbackModelAnthropic,
+		FallbackModelOpenAI:                  settings.FallbackModelOpenAI,
+		FallbackModelGemini:                  settings.FallbackModelGemini,
+		FallbackModelAntigravity:             settings.FallbackModelAntigravity,
+		EnableIdentityPatch:                  settings.EnableIdentityPatch,
+		IdentityPatchPrompt:                  settings.IdentityPatchPrompt,
+		OpsMonitoringEnabled:                 settings.OpsMonitoringEnabled,
+		OpsRealtimeMonitoringEnabled:         settings.OpsRealtimeMonitoringEnabled,
+		OpsQueryModeDefault:                  settings.OpsQueryModeDefault,
+		OpsMetricsIntervalSeconds:            settings.OpsMetricsIntervalSeconds,
 	})
 }
 
@@ -92,6 +99,12 @@ type UpdateSettingsRequest struct {
 	TurnstileSiteKey   string `json:"turnstile_site_key"`
 	TurnstileSecretKey string `json:"turnstile_secret_key"`
 
+	// LinuxDo Connect OAuth 登录（终端用户 SSO）
+	LinuxDoConnectEnabled      bool   `json:"linuxdo_connect_enabled"`
+	LinuxDoConnectClientID     string `json:"linuxdo_connect_client_id"`
+	LinuxDoConnectClientSecret string `json:"linuxdo_connect_client_secret"`
+	LinuxDoConnectRedirectURL  string `json:"linuxdo_connect_redirect_url"`
+
 	// OEM设置
 	SiteName     string `json:"site_name"`
 	SiteLogo     string `json:"site_logo"`
@@ -99,6 +112,7 @@ type UpdateSettingsRequest struct {
 	APIBaseURL   string `json:"api_base_url"`
 	ContactInfo  string `json:"contact_info"`
 	DocURL       string `json:"doc_url"`
+	HomeContent  string `json:"home_content"`
 
 	// 默认配置
 	DefaultConcurrency int     `json:"default_concurrency"`
@@ -175,6 +189,35 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 		}
 	}
 
+	// LinuxDo Connect 参数验证
+	if req.LinuxDoConnectEnabled {
+		req.LinuxDoConnectClientID = strings.TrimSpace(req.LinuxDoConnectClientID)
+		req.LinuxDoConnectClientSecret = strings.TrimSpace(req.LinuxDoConnectClientSecret)
+		req.LinuxDoConnectRedirectURL = strings.TrimSpace(req.LinuxDoConnectRedirectURL)
+
+		if req.LinuxDoConnectClientID == "" {
+			response.BadRequest(c, "LinuxDo Client ID is required when enabled")
+			return
+		}
+		if req.LinuxDoConnectRedirectURL == "" {
+			response.BadRequest(c, "LinuxDo Redirect URL is required when enabled")
+			return
+		}
+		if err := config.ValidateAbsoluteHTTPURL(req.LinuxDoConnectRedirectURL); err != nil {
+			response.BadRequest(c, "LinuxDo Redirect URL must be an absolute http(s) URL")
+			return
+		}
+
+		// 如果未提供 client_secret，则保留现有值（如有）。
+		if req.LinuxDoConnectClientSecret == "" {
+			if previousSettings.LinuxDoConnectClientSecret == "" {
+				response.BadRequest(c, "LinuxDo Client Secret is required when enabled")
+				return
+			}
+			req.LinuxDoConnectClientSecret = previousSettings.LinuxDoConnectClientSecret
+		}
+	}
+
 	// Ops metrics collector interval validation (seconds).
 	if req.OpsMetricsIntervalSeconds != nil {
 		v := *req.OpsMetricsIntervalSeconds
@@ -188,33 +231,38 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 	}
 
 	settings := &service.SystemSettings{
-		RegistrationEnabled:      req.RegistrationEnabled,
-		EmailVerifyEnabled:       req.EmailVerifyEnabled,
-		SMTPHost:                 req.SMTPHost,
-		SMTPPort:                 req.SMTPPort,
-		SMTPUsername:             req.SMTPUsername,
-		SMTPPassword:             req.SMTPPassword,
-		SMTPFrom:                 req.SMTPFrom,
-		SMTPFromName:             req.SMTPFromName,
-		SMTPUseTLS:               req.SMTPUseTLS,
-		TurnstileEnabled:         req.TurnstileEnabled,
-		TurnstileSiteKey:         req.TurnstileSiteKey,
-		TurnstileSecretKey:       req.TurnstileSecretKey,
-		SiteName:                 req.SiteName,
-		SiteLogo:                 req.SiteLogo,
-		SiteSubtitle:             req.SiteSubtitle,
-		APIBaseURL:               req.APIBaseURL,
-		ContactInfo:              req.ContactInfo,
-		DocURL:                   req.DocURL,
-		DefaultConcurrency:       req.DefaultConcurrency,
-		DefaultBalance:           req.DefaultBalance,
-		EnableModelFallback:      req.EnableModelFallback,
-		FallbackModelAnthropic:   req.FallbackModelAnthropic,
-		FallbackModelOpenAI:      req.FallbackModelOpenAI,
-		FallbackModelGemini:      req.FallbackModelGemini,
-		FallbackModelAntigravity: req.FallbackModelAntigravity,
-		EnableIdentityPatch:      req.EnableIdentityPatch,
-		IdentityPatchPrompt:      req.IdentityPatchPrompt,
+		RegistrationEnabled:        req.RegistrationEnabled,
+		EmailVerifyEnabled:         req.EmailVerifyEnabled,
+		SMTPHost:                   req.SMTPHost,
+		SMTPPort:                   req.SMTPPort,
+		SMTPUsername:               req.SMTPUsername,
+		SMTPPassword:               req.SMTPPassword,
+		SMTPFrom:                   req.SMTPFrom,
+		SMTPFromName:               req.SMTPFromName,
+		SMTPUseTLS:                 req.SMTPUseTLS,
+		TurnstileEnabled:           req.TurnstileEnabled,
+		TurnstileSiteKey:           req.TurnstileSiteKey,
+		TurnstileSecretKey:         req.TurnstileSecretKey,
+		LinuxDoConnectEnabled:      req.LinuxDoConnectEnabled,
+		LinuxDoConnectClientID:     req.LinuxDoConnectClientID,
+		LinuxDoConnectClientSecret: req.LinuxDoConnectClientSecret,
+		LinuxDoConnectRedirectURL:  req.LinuxDoConnectRedirectURL,
+		SiteName:                   req.SiteName,
+		SiteLogo:                   req.SiteLogo,
+		SiteSubtitle:               req.SiteSubtitle,
+		APIBaseURL:                 req.APIBaseURL,
+		ContactInfo:                req.ContactInfo,
+		DocURL:                     req.DocURL,
+		HomeContent:                req.HomeContent,
+		DefaultConcurrency:         req.DefaultConcurrency,
+		DefaultBalance:             req.DefaultBalance,
+		EnableModelFallback:        req.EnableModelFallback,
+		FallbackModelAnthropic:     req.FallbackModelAnthropic,
+		FallbackModelOpenAI:        req.FallbackModelOpenAI,
+		FallbackModelGemini:        req.FallbackModelGemini,
+		FallbackModelAntigravity:   req.FallbackModelAntigravity,
+		EnableIdentityPatch:        req.EnableIdentityPatch,
+		IdentityPatchPrompt:        req.IdentityPatchPrompt,
 		OpsMonitoringEnabled: func() bool {
 			if req.OpsMonitoringEnabled != nil {
 				return *req.OpsMonitoringEnabled
@@ -256,37 +304,42 @@ func (h *SettingHandler) UpdateSettings(c *gin.Context) {
 	}
 
 	response.Success(c, dto.SystemSettings{
-		RegistrationEnabled:          updatedSettings.RegistrationEnabled,
-		EmailVerifyEnabled:           updatedSettings.EmailVerifyEnabled,
-		SMTPHost:                     updatedSettings.SMTPHost,
-		SMTPPort:                     updatedSettings.SMTPPort,
-		SMTPUsername:                 updatedSettings.SMTPUsername,
-		SMTPPasswordConfigured:       updatedSettings.SMTPPasswordConfigured,
-		SMTPFrom:                     updatedSettings.SMTPFrom,
-		SMTPFromName:                 updatedSettings.SMTPFromName,
-		SMTPUseTLS:                   updatedSettings.SMTPUseTLS,
-		TurnstileEnabled:             updatedSettings.TurnstileEnabled,
-		TurnstileSiteKey:             updatedSettings.TurnstileSiteKey,
-		TurnstileSecretKeyConfigured: updatedSettings.TurnstileSecretKeyConfigured,
-		SiteName:                     updatedSettings.SiteName,
-		SiteLogo:                     updatedSettings.SiteLogo,
-		SiteSubtitle:                 updatedSettings.SiteSubtitle,
-		APIBaseURL:                   updatedSettings.APIBaseURL,
-		ContactInfo:                  updatedSettings.ContactInfo,
-		DocURL:                       updatedSettings.DocURL,
-		DefaultConcurrency:           updatedSettings.DefaultConcurrency,
-		DefaultBalance:               updatedSettings.DefaultBalance,
-		EnableModelFallback:          updatedSettings.EnableModelFallback,
-		FallbackModelAnthropic:       updatedSettings.FallbackModelAnthropic,
-		FallbackModelOpenAI:          updatedSettings.FallbackModelOpenAI,
-		FallbackModelGemini:          updatedSettings.FallbackModelGemini,
-		FallbackModelAntigravity:     updatedSettings.FallbackModelAntigravity,
-		EnableIdentityPatch:          updatedSettings.EnableIdentityPatch,
-		IdentityPatchPrompt:          updatedSettings.IdentityPatchPrompt,
-		OpsMonitoringEnabled:         updatedSettings.OpsMonitoringEnabled,
-		OpsRealtimeMonitoringEnabled: updatedSettings.OpsRealtimeMonitoringEnabled,
-		OpsQueryModeDefault:          updatedSettings.OpsQueryModeDefault,
-		OpsMetricsIntervalSeconds:    updatedSettings.OpsMetricsIntervalSeconds,
+		RegistrationEnabled:                  updatedSettings.RegistrationEnabled,
+		EmailVerifyEnabled:                   updatedSettings.EmailVerifyEnabled,
+		SMTPHost:                             updatedSettings.SMTPHost,
+		SMTPPort:                             updatedSettings.SMTPPort,
+		SMTPUsername:                         updatedSettings.SMTPUsername,
+		SMTPPasswordConfigured:               updatedSettings.SMTPPasswordConfigured,
+		SMTPFrom:                             updatedSettings.SMTPFrom,
+		SMTPFromName:                         updatedSettings.SMTPFromName,
+		SMTPUseTLS:                           updatedSettings.SMTPUseTLS,
+		TurnstileEnabled:                     updatedSettings.TurnstileEnabled,
+		TurnstileSiteKey:                     updatedSettings.TurnstileSiteKey,
+		TurnstileSecretKeyConfigured:         updatedSettings.TurnstileSecretKeyConfigured,
+		LinuxDoConnectEnabled:                updatedSettings.LinuxDoConnectEnabled,
+		LinuxDoConnectClientID:               updatedSettings.LinuxDoConnectClientID,
+		LinuxDoConnectClientSecretConfigured: updatedSettings.LinuxDoConnectClientSecretConfigured,
+		LinuxDoConnectRedirectURL:            updatedSettings.LinuxDoConnectRedirectURL,
+		SiteName:                             updatedSettings.SiteName,
+		SiteLogo:                             updatedSettings.SiteLogo,
+		SiteSubtitle:                         updatedSettings.SiteSubtitle,
+		APIBaseURL:                           updatedSettings.APIBaseURL,
+		ContactInfo:                          updatedSettings.ContactInfo,
+		DocURL:                               updatedSettings.DocURL,
+		HomeContent:                          updatedSettings.HomeContent,
+		DefaultConcurrency:                   updatedSettings.DefaultConcurrency,
+		DefaultBalance:                       updatedSettings.DefaultBalance,
+		EnableModelFallback:                  updatedSettings.EnableModelFallback,
+		FallbackModelAnthropic:               updatedSettings.FallbackModelAnthropic,
+		FallbackModelOpenAI:                  updatedSettings.FallbackModelOpenAI,
+		FallbackModelGemini:                  updatedSettings.FallbackModelGemini,
+		FallbackModelAntigravity:             updatedSettings.FallbackModelAntigravity,
+		EnableIdentityPatch:                  updatedSettings.EnableIdentityPatch,
+		IdentityPatchPrompt:                  updatedSettings.IdentityPatchPrompt,
+		OpsMonitoringEnabled:                 updatedSettings.OpsMonitoringEnabled,
+		OpsRealtimeMonitoringEnabled:         updatedSettings.OpsRealtimeMonitoringEnabled,
+		OpsQueryModeDefault:                  updatedSettings.OpsQueryModeDefault,
+		OpsMetricsIntervalSeconds:            updatedSettings.OpsMetricsIntervalSeconds,
 	})
 }
 
@@ -348,6 +401,18 @@ func diffSettings(before *service.SystemSettings, after *service.SystemSettings,
 	if req.TurnstileSecretKey != "" {
 		changed = append(changed, "turnstile_secret_key")
 	}
+	if before.LinuxDoConnectEnabled != after.LinuxDoConnectEnabled {
+		changed = append(changed, "linuxdo_connect_enabled")
+	}
+	if before.LinuxDoConnectClientID != after.LinuxDoConnectClientID {
+		changed = append(changed, "linuxdo_connect_client_id")
+	}
+	if req.LinuxDoConnectClientSecret != "" {
+		changed = append(changed, "linuxdo_connect_client_secret")
+	}
+	if before.LinuxDoConnectRedirectURL != after.LinuxDoConnectRedirectURL {
+		changed = append(changed, "linuxdo_connect_redirect_url")
+	}
 	if before.SiteName != after.SiteName {
 		changed = append(changed, "site_name")
 	}
@@ -366,6 +431,9 @@ func diffSettings(before *service.SystemSettings, after *service.SystemSettings,
 	if before.DocURL != after.DocURL {
 		changed = append(changed, "doc_url")
 	}
+	if before.HomeContent != after.HomeContent {
+		changed = append(changed, "home_content")
+	}
 	if before.DefaultConcurrency != after.DefaultConcurrency {
 		changed = append(changed, "default_concurrency")
 	}
@@ -387,6 +455,12 @@ func diffSettings(before *service.SystemSettings, after *service.SystemSettings,
 	if before.FallbackModelAntigravity != after.FallbackModelAntigravity {
 		changed = append(changed, "fallback_model_antigravity")
 	}
+	if before.EnableIdentityPatch != after.EnableIdentityPatch {
+		changed = append(changed, "enable_identity_patch")
+	}
+	if before.IdentityPatchPrompt != after.IdentityPatchPrompt {
+		changed = append(changed, "identity_patch_prompt")
+	}
 	if before.OpsMonitoringEnabled != after.OpsMonitoringEnabled {
 		changed = append(changed, "ops_monitoring_enabled")
 	}

backend/internal/handler/auth_handler.go

@@ -12,19 +12,21 @@ import (
 
 // AuthHandler handles authentication-related requests
 type AuthHandler struct {
-	cfg         *config.Config
-	authService *service.AuthService
-	userService *service.UserService
-	settingSvc  *service.SettingService
+	cfg          *config.Config
+	authService  *service.AuthService
+	userService  *service.UserService
+	settingSvc   *service.SettingService
+	promoService *service.PromoService
 }
 
 // NewAuthHandler creates a new AuthHandler
-func NewAuthHandler(cfg *config.Config, authService *service.AuthService, userService *service.UserService, settingService *service.SettingService) *AuthHandler {
+func NewAuthHandler(cfg *config.Config, authService *service.AuthService, userService *service.UserService, settingService *service.SettingService, promoService *service.PromoService) *AuthHandler {
 	return &AuthHandler{
-		cfg:         cfg,
-		authService: authService,
-		userService: userService,
-		settingSvc:  settingService,
+		cfg:          cfg,
+		authService:  authService,
+		userService:  userService,
+		settingSvc:   settingService,
+		promoService: promoService,
 	}
 }
 
@@ -34,6 +36,7 @@ type RegisterRequest struct {
 	Password       string `json:"password" binding:"required,min=6"`
 	VerifyCode     string `json:"verify_code"`
 	TurnstileToken string `json:"turnstile_token"`
+	PromoCode      string `json:"promo_code"` // 注册优惠码
 }
 
 // SendVerifyCodeRequest 发送验证码请求
@@ -79,7 +82,7 @@ func (h *AuthHandler) Register(c *gin.Context) {
 		}
 	}
 
-	token, user, err := h.authService.RegisterWithVerification(c.Request.Context(), req.Email, req.Password, req.VerifyCode)
+	token, user, err := h.authService.RegisterWithVerification(c.Request.Context(), req.Email, req.Password, req.VerifyCode, req.PromoCode)
 	if err != nil {
 		response.ErrorFrom(c, err)
 		return
@@ -174,3 +177,63 @@ func (h *AuthHandler) GetCurrentUser(c *gin.Context) {
 
 	response.Success(c, UserResponse{User: dto.UserFromService(user), RunMode: runMode})
 }
+
+// ValidatePromoCodeRequest 验证优惠码请求
+type ValidatePromoCodeRequest struct {
+	Code string `json:"code" binding:"required"`
+}
+
+// ValidatePromoCodeResponse 验证优惠码响应
+type ValidatePromoCodeResponse struct {
+	Valid       bool    `json:"valid"`
+	BonusAmount float64 `json:"bonus_amount,omitempty"`
+	ErrorCode   string  `json:"error_code,omitempty"`
+	Message     string  `json:"message,omitempty"`
+}
+
+// ValidatePromoCode 验证优惠码（公开接口，注册前调用）
+// POST /api/v1/auth/validate-promo-code
+func (h *AuthHandler) ValidatePromoCode(c *gin.Context) {
+	var req ValidatePromoCodeRequest
+	if err := c.ShouldBindJSON(&req); err != nil {
+		response.BadRequest(c, "Invalid request: "+err.Error())
+		return
+	}
+
+	promoCode, err := h.promoService.ValidatePromoCode(c.Request.Context(), req.Code)
+	if err != nil {
+		// 根据错误类型返回对应的错误码
+		errorCode := "PROMO_CODE_INVALID"
+		switch err {
+		case service.ErrPromoCodeNotFound:
+			errorCode = "PROMO_CODE_NOT_FOUND"
+		case service.ErrPromoCodeExpired:
+			errorCode = "PROMO_CODE_EXPIRED"
+		case service.ErrPromoCodeDisabled:
+			errorCode = "PROMO_CODE_DISABLED"
+		case service.ErrPromoCodeMaxUsed:
+			errorCode = "PROMO_CODE_MAX_USED"
+		case service.ErrPromoCodeAlreadyUsed:
+			errorCode = "PROMO_CODE_ALREADY_USED"
+		}
+
+		response.Success(c, ValidatePromoCodeResponse{
+			Valid:     false,
+			ErrorCode: errorCode,
+		})
+		return
+	}
+
+	if promoCode == nil {
+		response.Success(c, ValidatePromoCodeResponse{
+			Valid:     false,
+			ErrorCode: "PROMO_CODE_INVALID",
+		})
+		return
+	}
+
+	response.Success(c, ValidatePromoCodeResponse{
+		Valid:       true,
+		BonusAmount: promoCode.BonusAmount,
+	})
+}

backend/internal/handler/dto/mappers.go

@@ -370,3 +370,35 @@ func BulkAssignResultFromService(r *service.BulkAssignResult) *BulkAssignResult
 		Errors:        r.Errors,
 	}
 }
+
+func PromoCodeFromService(pc *service.PromoCode) *PromoCode {
+	if pc == nil {
+		return nil
+	}
+	return &PromoCode{
+		ID:          pc.ID,
+		Code:        pc.Code,
+		BonusAmount: pc.BonusAmount,
+		MaxUses:     pc.MaxUses,
+		UsedCount:   pc.UsedCount,
+		Status:      pc.Status,
+		ExpiresAt:   pc.ExpiresAt,
+		Notes:       pc.Notes,
+		CreatedAt:   pc.CreatedAt,
+		UpdatedAt:   pc.UpdatedAt,
+	}
+}
+
+func PromoCodeUsageFromService(u *service.PromoCodeUsage) *PromoCodeUsage {
+	if u == nil {
+		return nil
+	}
+	return &PromoCodeUsage{
+		ID:          u.ID,
+		PromoCodeID: u.PromoCodeID,
+		UserID:      u.UserID,
+		BonusAmount: u.BonusAmount,
+		UsedAt:      u.UsedAt,
+		User:        UserFromServiceShallow(u.User),
+	}
+}

backend/internal/handler/dto/settings.go

@@ -28,6 +28,7 @@ type SystemSettings struct {
 	APIBaseURL   string `json:"api_base_url"`
 	ContactInfo  string `json:"contact_info"`
 	DocURL       string `json:"doc_url"`
+	HomeContent  string `json:"home_content"`
 
 	DefaultConcurrency int     `json:"default_concurrency"`
 	DefaultBalance     float64 `json:"default_balance"`
@@ -61,6 +62,7 @@ type PublicSettings struct {
 	APIBaseURL          string `json:"api_base_url"`
 	ContactInfo         string `json:"contact_info"`
 	DocURL              string `json:"doc_url"`
+	HomeContent         string `json:"home_content"`
 	LinuxDoOAuthEnabled bool   `json:"linuxdo_oauth_enabled"`
 	Version             string `json:"version"`
 }

backend/internal/handler/dto/types.go

@@ -250,3 +250,28 @@ type BulkAssignResult struct {
 	Subscriptions []UserSubscription `json:"subscriptions"`
 	Errors        []string           `json:"errors"`
 }
+
+// PromoCode 注册优惠码
+type PromoCode struct {
+	ID          int64      `json:"id"`
+	Code        string     `json:"code"`
+	BonusAmount float64    `json:"bonus_amount"`
+	MaxUses     int        `json:"max_uses"`
+	UsedCount   int        `json:"used_count"`
+	Status      string     `json:"status"`
+	ExpiresAt   *time.Time `json:"expires_at"`
+	Notes       string     `json:"notes"`
+	CreatedAt   time.Time  `json:"created_at"`
+	UpdatedAt   time.Time  `json:"updated_at"`
+}
+
+// PromoCodeUsage 优惠码使用记录
+type PromoCodeUsage struct {
+	ID          int64     `json:"id"`
+	PromoCodeID int64     `json:"promo_code_id"`
+	UserID      int64     `json:"user_id"`
+	BonusAmount float64   `json:"bonus_amount"`
+	UsedAt      time.Time `json:"used_at"`
+
+	User *User `json:"user,omitempty"`
+}

backend/internal/handler/handler.go

@@ -16,6 +16,7 @@ type AdminHandlers struct {
 	AntigravityOAuth *admin.AntigravityOAuthHandler
 	Proxy            *admin.ProxyHandler
 	Redeem           *admin.RedeemHandler
+	Promo            *admin.PromoHandler
 	Setting          *admin.SettingHandler
 	Ops              *admin.OpsHandler
 	System           *admin.SystemHandler

backend/internal/handler/setting_handler.go

@@ -42,6 +42,7 @@ func (h *SettingHandler) GetPublicSettings(c *gin.Context) {
 		APIBaseURL:          settings.APIBaseURL,
 		ContactInfo:         settings.ContactInfo,
 		DocURL:              settings.DocURL,
+		HomeContent:         settings.HomeContent,
 		LinuxDoOAuthEnabled: settings.LinuxDoOAuthEnabled,
 		Version:             h.version,
 	})

backend/internal/handler/wire.go

@@ -19,6 +19,7 @@ func ProvideAdminHandlers(
 	antigravityOAuthHandler *admin.AntigravityOAuthHandler,
 	proxyHandler *admin.ProxyHandler,
 	redeemHandler *admin.RedeemHandler,
+	promoHandler *admin.PromoHandler,
 	settingHandler *admin.SettingHandler,
 	opsHandler *admin.OpsHandler,
 	systemHandler *admin.SystemHandler,
@@ -37,6 +38,7 @@ func ProvideAdminHandlers(
 		AntigravityOAuth: antigravityOAuthHandler,
 		Proxy:            proxyHandler,
 		Redeem:           redeemHandler,
+		Promo:            promoHandler,
 		Setting:          settingHandler,
 		Ops:              opsHandler,
 		System:           systemHandler,
@@ -107,6 +109,7 @@ var ProviderSet = wire.NewSet(
 	admin.NewAntigravityOAuthHandler,
 	admin.NewProxyHandler,
 	admin.NewRedeemHandler,
+	admin.NewPromoHandler,
 	admin.NewSettingHandler,
 	admin.NewOpsHandler,
 	ProvideSystemHandler,

backend/internal/middleware/rate_limiter.go

@@ -0,0 +1,60 @@
+package middleware
+
+import (
+	"net/http"
+	"time"
+
+	"github.com/gin-gonic/gin"
+	"github.com/redis/go-redis/v9"
+)
+
+// RateLimiter Redis 速率限制器
+type RateLimiter struct {
+	redis  *redis.Client
+	prefix string
+}
+
+// NewRateLimiter 创建速率限制器实例
+func NewRateLimiter(redisClient *redis.Client) *RateLimiter {
+	return &RateLimiter{
+		redis:  redisClient,
+		prefix: "rate_limit:",
+	}
+}
+
+// Limit 返回速率限制中间件
+// key: 限制类型标识
+// limit: 时间窗口内最大请求数
+// window: 时间窗口
+func (r *RateLimiter) Limit(key string, limit int, window time.Duration) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		ip := c.ClientIP()
+		redisKey := r.prefix + key + ":" + ip
+
+		ctx := c.Request.Context()
+
+		// 使用 INCR 原子操作增加计数
+		count, err := r.redis.Incr(ctx, redisKey).Result()
+		if err != nil {
+			// Redis 错误时放行，避免影响正常服务
+			c.Next()
+			return
+		}
+
+		// 首次访问时设置过期时间
+		if count == 1 {
+			r.redis.Expire(ctx, redisKey, window)
+		}
+
+		// 超过限制
+		if count > int64(limit) {
+			c.AbortWithStatusJSON(http.StatusTooManyRequests, gin.H{
+				"error":   "rate limit exceeded",
+				"message": "Too many requests, please try again later",
+			})
+			return
+		}
+
+		c.Next()
+	}
+}

backend/internal/pkg/ctxkey/ctxkey.go

@@ -16,4 +16,6 @@ const (
 
 	// IsClaudeCodeClient 标识当前请求是否来自 Claude Code 客户端
 	IsClaudeCodeClient Key = "ctx_is_claude_code_client"
+	// Group 认证后的分组信息，由 API Key 认证中间件设置
+	Group Key = "ctx_group"
 )

backend/internal/repository/api_key_repo.go

@@ -339,6 +339,7 @@ func groupEntityToService(g *dbent.Group) *service.Group {
 		RateMultiplier:      g.RateMultiplier,
 		IsExclusive:         g.IsExclusive,
 		Status:              g.Status,
+		Hydrated:            true,
 		SubscriptionType:    g.SubscriptionType,
 		DailyLimitUSD:       g.DailyLimitUsd,
 		WeeklyLimitUSD:      g.WeeklyLimitUsd,

backend/internal/repository/group_repo.go

@@ -60,6 +60,17 @@ func (r *groupRepository) Create(ctx context.Context, groupIn *service.Group) er
 }
 
 func (r *groupRepository) GetByID(ctx context.Context, id int64) (*service.Group, error) {
+	out, err := r.GetByIDLite(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	count, _ := r.GetAccountCount(ctx, out.ID)
+	out.AccountCount = count
+	return out, nil
+}
+
+func (r *groupRepository) GetByIDLite(ctx context.Context, id int64) (*service.Group, error) {
+	// AccountCount is intentionally not loaded here; use GetByID when needed.
 	m, err := r.client.Group.Query().
 		Where(group.IDEQ(id)).
 		Only(ctx)
@@ -67,10 +78,7 @@ func (r *groupRepository) GetByID(ctx context.Context, id int64) (*service.Group
 		return nil, translatePersistenceError(err, service.ErrGroupNotFound, nil)
 	}
 
-	out := groupEntityToService(m)
-	count, _ := r.GetAccountCount(ctx, out.ID)
-	out.AccountCount = count
-	return out, nil
+	return groupEntityToService(m), nil
 }
 
 func (r *groupRepository) Update(ctx context.Context, groupIn *service.Group) error {

backend/internal/repository/group_repo_integration_test.go

@@ -4,6 +4,8 @@ package repository
 
 import (
 	"context"
+	"database/sql"
+	"errors"
 	"testing"
 
 	dbent "github.com/Wei-Shaw/sub2api/ent"
@@ -19,6 +21,20 @@ type GroupRepoSuite struct {
 	repo *groupRepository
 }
 
+type forbidSQLExecutor struct {
+	called bool
+}
+
+func (s *forbidSQLExecutor) ExecContext(ctx context.Context, query string, args ...any) (sql.Result, error) {
+	s.called = true
+	return nil, errors.New("unexpected sql exec")
+}
+
+func (s *forbidSQLExecutor) QueryContext(ctx context.Context, query string, args ...any) (*sql.Rows, error) {
+	s.called = true
+	return nil, errors.New("unexpected sql query")
+}
+
 func (s *GroupRepoSuite) SetupTest() {
 	s.ctx = context.Background()
 	tx := testEntTx(s.T())
@@ -57,6 +73,26 @@ func (s *GroupRepoSuite) TestGetByID_NotFound() {
 	s.Require().ErrorIs(err, service.ErrGroupNotFound)
 }
 
+func (s *GroupRepoSuite) TestGetByIDLite_DoesNotUseAccountCount() {
+	group := &service.Group{
+		Name:             "lite-group",
+		Platform:         service.PlatformAnthropic,
+		RateMultiplier:   1.0,
+		IsExclusive:      false,
+		Status:           service.StatusActive,
+		SubscriptionType: service.SubscriptionTypeStandard,
+	}
+	s.Require().NoError(s.repo.Create(s.ctx, group))
+
+	spy := &forbidSQLExecutor{}
+	repo := newGroupRepositoryWithSQL(s.tx.Client(), spy)
+
+	got, err := repo.GetByIDLite(s.ctx, group.ID)
+	s.Require().NoError(err)
+	s.Require().Equal(group.ID, got.ID)
+	s.Require().False(spy.called, "expected no direct sql executor usage")
+}
+
 func (s *GroupRepoSuite) TestUpdate() {
 	group := &service.Group{
 		Name:             "original",

backend/internal/repository/promo_code_repo.go

@@ -0,0 +1,273 @@
+package repository
+
+import (
+	"context"
+
+	dbent "github.com/Wei-Shaw/sub2api/ent"
+	"github.com/Wei-Shaw/sub2api/ent/promocode"
+	"github.com/Wei-Shaw/sub2api/ent/promocodeusage"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
+	"github.com/Wei-Shaw/sub2api/internal/service"
+)
+
+type promoCodeRepository struct {
+	client *dbent.Client
+}
+
+func NewPromoCodeRepository(client *dbent.Client) service.PromoCodeRepository {
+	return &promoCodeRepository{client: client}
+}
+
+func (r *promoCodeRepository) Create(ctx context.Context, code *service.PromoCode) error {
+	client := clientFromContext(ctx, r.client)
+	builder := client.PromoCode.Create().
+		SetCode(code.Code).
+		SetBonusAmount(code.BonusAmount).
+		SetMaxUses(code.MaxUses).
+		SetUsedCount(code.UsedCount).
+		SetStatus(code.Status).
+		SetNotes(code.Notes)
+
+	if code.ExpiresAt != nil {
+		builder.SetExpiresAt(*code.ExpiresAt)
+	}
+
+	created, err := builder.Save(ctx)
+	if err != nil {
+		return err
+	}
+
+	code.ID = created.ID
+	code.CreatedAt = created.CreatedAt
+	code.UpdatedAt = created.UpdatedAt
+	return nil
+}
+
+func (r *promoCodeRepository) GetByID(ctx context.Context, id int64) (*service.PromoCode, error) {
+	m, err := r.client.PromoCode.Query().
+		Where(promocode.IDEQ(id)).
+		Only(ctx)
+	if err != nil {
+		if dbent.IsNotFound(err) {
+			return nil, service.ErrPromoCodeNotFound
+		}
+		return nil, err
+	}
+	return promoCodeEntityToService(m), nil
+}
+
+func (r *promoCodeRepository) GetByCode(ctx context.Context, code string) (*service.PromoCode, error) {
+	m, err := r.client.PromoCode.Query().
+		Where(promocode.CodeEqualFold(code)).
+		Only(ctx)
+	if err != nil {
+		if dbent.IsNotFound(err) {
+			return nil, service.ErrPromoCodeNotFound
+		}
+		return nil, err
+	}
+	return promoCodeEntityToService(m), nil
+}
+
+func (r *promoCodeRepository) GetByCodeForUpdate(ctx context.Context, code string) (*service.PromoCode, error) {
+	client := clientFromContext(ctx, r.client)
+	m, err := client.PromoCode.Query().
+		Where(promocode.CodeEqualFold(code)).
+		ForUpdate().
+		Only(ctx)
+	if err != nil {
+		if dbent.IsNotFound(err) {
+			return nil, service.ErrPromoCodeNotFound
+		}
+		return nil, err
+	}
+	return promoCodeEntityToService(m), nil
+}
+
+func (r *promoCodeRepository) Update(ctx context.Context, code *service.PromoCode) error {
+	client := clientFromContext(ctx, r.client)
+	builder := client.PromoCode.UpdateOneID(code.ID).
+		SetCode(code.Code).
+		SetBonusAmount(code.BonusAmount).
+		SetMaxUses(code.MaxUses).
+		SetUsedCount(code.UsedCount).
+		SetStatus(code.Status).
+		SetNotes(code.Notes)
+
+	if code.ExpiresAt != nil {
+		builder.SetExpiresAt(*code.ExpiresAt)
+	} else {
+		builder.ClearExpiresAt()
+	}
+
+	updated, err := builder.Save(ctx)
+	if err != nil {
+		if dbent.IsNotFound(err) {
+			return service.ErrPromoCodeNotFound
+		}
+		return err
+	}
+
+	code.UpdatedAt = updated.UpdatedAt
+	return nil
+}
+
+func (r *promoCodeRepository) Delete(ctx context.Context, id int64) error {
+	client := clientFromContext(ctx, r.client)
+	_, err := client.PromoCode.Delete().Where(promocode.IDEQ(id)).Exec(ctx)
+	return err
+}
+
+func (r *promoCodeRepository) List(ctx context.Context, params pagination.PaginationParams) ([]service.PromoCode, *pagination.PaginationResult, error) {
+	return r.ListWithFilters(ctx, params, "", "")
+}
+
+func (r *promoCodeRepository) ListWithFilters(ctx context.Context, params pagination.PaginationParams, status, search string) ([]service.PromoCode, *pagination.PaginationResult, error) {
+	q := r.client.PromoCode.Query()
+
+	if status != "" {
+		q = q.Where(promocode.StatusEQ(status))
+	}
+	if search != "" {
+		q = q.Where(promocode.CodeContainsFold(search))
+	}
+
+	total, err := q.Count(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	codes, err := q.
+		Offset(params.Offset()).
+		Limit(params.Limit()).
+		Order(dbent.Desc(promocode.FieldID)).
+		All(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	outCodes := promoCodeEntitiesToService(codes)
+
+	return outCodes, paginationResultFromTotal(int64(total), params), nil
+}
+
+func (r *promoCodeRepository) CreateUsage(ctx context.Context, usage *service.PromoCodeUsage) error {
+	client := clientFromContext(ctx, r.client)
+	created, err := client.PromoCodeUsage.Create().
+		SetPromoCodeID(usage.PromoCodeID).
+		SetUserID(usage.UserID).
+		SetBonusAmount(usage.BonusAmount).
+		SetUsedAt(usage.UsedAt).
+		Save(ctx)
+	if err != nil {
+		return err
+	}
+
+	usage.ID = created.ID
+	return nil
+}
+
+func (r *promoCodeRepository) GetUsageByPromoCodeAndUser(ctx context.Context, promoCodeID, userID int64) (*service.PromoCodeUsage, error) {
+	m, err := r.client.PromoCodeUsage.Query().
+		Where(
+			promocodeusage.PromoCodeIDEQ(promoCodeID),
+			promocodeusage.UserIDEQ(userID),
+		).
+		Only(ctx)
+	if err != nil {
+		if dbent.IsNotFound(err) {
+			return nil, nil
+		}
+		return nil, err
+	}
+	return promoCodeUsageEntityToService(m), nil
+}
+
+func (r *promoCodeRepository) ListUsagesByPromoCode(ctx context.Context, promoCodeID int64, params pagination.PaginationParams) ([]service.PromoCodeUsage, *pagination.PaginationResult, error) {
+	q := r.client.PromoCodeUsage.Query().
+		Where(promocodeusage.PromoCodeIDEQ(promoCodeID))
+
+	total, err := q.Count(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	usages, err := q.
+		WithUser().
+		Offset(params.Offset()).
+		Limit(params.Limit()).
+		Order(dbent.Desc(promocodeusage.FieldID)).
+		All(ctx)
+	if err != nil {
+		return nil, nil, err
+	}
+
+	outUsages := promoCodeUsageEntitiesToService(usages)
+
+	return outUsages, paginationResultFromTotal(int64(total), params), nil
+}
+
+func (r *promoCodeRepository) IncrementUsedCount(ctx context.Context, id int64) error {
+	client := clientFromContext(ctx, r.client)
+	_, err := client.PromoCode.UpdateOneID(id).
+		AddUsedCount(1).
+		Save(ctx)
+	return err
+}
+
+// Entity to Service conversions
+
+func promoCodeEntityToService(m *dbent.PromoCode) *service.PromoCode {
+	if m == nil {
+		return nil
+	}
+	return &service.PromoCode{
+		ID:          m.ID,
+		Code:        m.Code,
+		BonusAmount: m.BonusAmount,
+		MaxUses:     m.MaxUses,
+		UsedCount:   m.UsedCount,
+		Status:      m.Status,
+		ExpiresAt:   m.ExpiresAt,
+		Notes:       derefString(m.Notes),
+		CreatedAt:   m.CreatedAt,
+		UpdatedAt:   m.UpdatedAt,
+	}
+}
+
+func promoCodeEntitiesToService(models []*dbent.PromoCode) []service.PromoCode {
+	out := make([]service.PromoCode, 0, len(models))
+	for i := range models {
+		if s := promoCodeEntityToService(models[i]); s != nil {
+			out = append(out, *s)
+		}
+	}
+	return out
+}
+
+func promoCodeUsageEntityToService(m *dbent.PromoCodeUsage) *service.PromoCodeUsage {
+	if m == nil {
+		return nil
+	}
+	out := &service.PromoCodeUsage{
+		ID:          m.ID,
+		PromoCodeID: m.PromoCodeID,
+		UserID:      m.UserID,
+		BonusAmount: m.BonusAmount,
+		UsedAt:      m.UsedAt,
+	}
+	if m.Edges.User != nil {
+		out.User = userEntityToService(m.Edges.User)
+	}
+	return out
+}
+
+func promoCodeUsageEntitiesToService(models []*dbent.PromoCodeUsage) []service.PromoCodeUsage {
+	out := make([]service.PromoCodeUsage, 0, len(models))
+	for i := range models {
+		if s := promoCodeUsageEntityToService(models[i]); s != nil {
+			out = append(out, *s)
+		}
+	}
+	return out
+}

backend/internal/repository/wire.go

@@ -45,6 +45,7 @@ var ProviderSet = wire.NewSet(
 	NewAccountRepository,
 	NewProxyRepository,
 	NewRedeemCodeRepository,
+	NewPromoCodeRepository,
 	NewUsageLogRepository,
 	NewSettingRepository,
 	NewOpsRepository,

backend/internal/server/api_contract_test.go

@@ -327,10 +327,7 @@ func TestAPIContracts(t *testing.T) {
 					"fallback_model_openai": "gpt-4o",
 					"enable_identity_patch": true,
 					"identity_patch_prompt": "",
-					"ops_monitoring_enabled": true,
-					"ops_realtime_monitoring_enabled": true,
-					"ops_query_mode_default": "auto",
-					"ops_metrics_interval_seconds": 60
+					"home_content": ""
 				}
 			}`,
 		},
@@ -402,7 +399,7 @@ func newContractDeps(t *testing.T) *contractDeps {
 	settingRepo := newStubSettingRepo()
 	settingService := service.NewSettingService(settingRepo, cfg)
 
-	authHandler := handler.NewAuthHandler(cfg, nil, userService, settingService)
+	authHandler := handler.NewAuthHandler(cfg, nil, userService, settingService, nil)
 	apiKeyHandler := handler.NewAPIKeyHandler(apiKeyService)
 	usageHandler := handler.NewUsageHandler(usageService, apiKeyService)
 	adminSettingHandler := adminhandler.NewSettingHandler(settingService, nil, nil)
@@ -579,6 +576,10 @@ func (stubGroupRepo) GetByID(ctx context.Context, id int64) (*service.Group, err
 	return nil, service.ErrGroupNotFound
 }
 
+func (stubGroupRepo) GetByIDLite(ctx context.Context, id int64) (*service.Group, error) {
+	return nil, service.ErrGroupNotFound
+}
+
 func (stubGroupRepo) Update(ctx context.Context, group *service.Group) error {
 	return errors.New("not implemented")
 }

backend/internal/server/http.go

@@ -13,6 +13,7 @@ import (
 
 	"github.com/gin-gonic/gin"
 	"github.com/google/wire"
+	"github.com/redis/go-redis/v9"
 )
 
 // ProviderSet 提供服务器层的依赖
@@ -31,6 +32,8 @@ func ProvideRouter(
 	apiKeyService *service.APIKeyService,
 	subscriptionService *service.SubscriptionService,
 	opsService *service.OpsService,
+	settingService *service.SettingService,
+	redisClient *redis.Client,
 ) *gin.Engine {
 	if cfg.Server.Mode == "release" {
 		gin.SetMode(gin.ReleaseMode)
@@ -48,7 +51,7 @@ func ProvideRouter(
 		}
 	}
 
-	return SetupRouter(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, opsService, cfg)
+	return SetupRouter(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, opsService, settingService, cfg, redisClient)
 }
 
 // ProvideHTTPServer 提供 HTTP 服务器

backend/internal/server/middleware/api_key_auth.go

@@ -1,11 +1,13 @@
 package middleware
 
 import (
+	"context"
 	"errors"
 	"log"
 	"strings"
 
 	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/ctxkey"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/ip"
 	"github.com/Wei-Shaw/sub2api/internal/service"
 
@@ -103,6 +105,7 @@ func apiKeyAuthWithSubscription(apiKeyService *service.APIKeyService, subscripti
 				Concurrency: apiKey.User.Concurrency,
 			})
 			c.Set(string(ContextKeyUserRole), apiKey.User.Role)
+			setGroupContext(c, apiKey.Group)
 			c.Next()
 			return
 		}
@@ -161,6 +164,7 @@ func apiKeyAuthWithSubscription(apiKeyService *service.APIKeyService, subscripti
 			Concurrency: apiKey.User.Concurrency,
 		})
 		c.Set(string(ContextKeyUserRole), apiKey.User.Role)
+		setGroupContext(c, apiKey.Group)
 
 		c.Next()
 	}
@@ -185,3 +189,14 @@ func GetSubscriptionFromContext(c *gin.Context) (*service.UserSubscription, bool
 	subscription, ok := value.(*service.UserSubscription)
 	return subscription, ok
 }
+
+func setGroupContext(c *gin.Context, group *service.Group) {
+	if !service.IsGroupContextValid(group) {
+		return
+	}
+	if existing, ok := c.Request.Context().Value(ctxkey.Group).(*service.Group); ok && existing != nil && existing.ID == group.ID && service.IsGroupContextValid(existing) {
+		return
+	}
+	ctx := context.WithValue(c.Request.Context(), ctxkey.Group, group)
+	c.Request = c.Request.WithContext(ctx)
+}

backend/internal/server/middleware/api_key_auth_google.go

@@ -63,6 +63,7 @@ func APIKeyAuthWithSubscriptionGoogle(apiKeyService *service.APIKeyService, subs
 				Concurrency: apiKey.User.Concurrency,
 			})
 			c.Set(string(ContextKeyUserRole), apiKey.User.Role)
+			setGroupContext(c, apiKey.Group)
 			c.Next()
 			return
 		}
@@ -102,6 +103,7 @@ func APIKeyAuthWithSubscriptionGoogle(apiKeyService *service.APIKeyService, subs
 			Concurrency: apiKey.User.Concurrency,
 		})
 		c.Set(string(ContextKeyUserRole), apiKey.User.Role)
+		setGroupContext(c, apiKey.Group)
 		c.Next()
 	}
 }

backend/internal/server/middleware/api_key_auth_google_test.go

@@ -9,6 +9,7 @@ import (
 	"testing"
 
 	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/ctxkey"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"github.com/Wei-Shaw/sub2api/internal/service"
 
@@ -133,6 +134,70 @@ func TestApiKeyAuthWithSubscriptionGoogle_QueryApiKeyRejected(t *testing.T) {
 	require.Equal(t, "INVALID_ARGUMENT", resp.Error.Status)
 }
 
+func TestApiKeyAuthWithSubscriptionGoogleSetsGroupContext(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	group := &service.Group{
+		ID:       99,
+		Name:     "g1",
+		Status:   service.StatusActive,
+		Platform: service.PlatformGemini,
+		Hydrated: true,
+	}
+	user := &service.User{
+		ID:          7,
+		Role:        service.RoleUser,
+		Status:      service.StatusActive,
+		Balance:     10,
+		Concurrency: 3,
+	}
+	apiKey := &service.APIKey{
+		ID:     100,
+		UserID: user.ID,
+		Key:    "test-key",
+		Status: service.StatusActive,
+		User:   user,
+		Group:  group,
+	}
+	apiKey.GroupID = &group.ID
+
+	apiKeyService := service.NewAPIKeyService(
+		fakeAPIKeyRepo{
+			getByKey: func(ctx context.Context, key string) (*service.APIKey, error) {
+				if key != apiKey.Key {
+					return nil, service.ErrAPIKeyNotFound
+				}
+				clone := *apiKey
+				return &clone, nil
+			},
+		},
+		nil,
+		nil,
+		nil,
+		nil,
+		&config.Config{RunMode: config.RunModeSimple},
+	)
+
+	cfg := &config.Config{RunMode: config.RunModeSimple}
+	r := gin.New()
+	r.Use(APIKeyAuthWithSubscriptionGoogle(apiKeyService, nil, cfg))
+	r.GET("/v1beta/test", func(c *gin.Context) {
+		groupFromCtx, ok := c.Request.Context().Value(ctxkey.Group).(*service.Group)
+		if !ok || groupFromCtx == nil || groupFromCtx.ID != group.ID {
+			c.JSON(http.StatusInternalServerError, gin.H{"ok": false})
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"ok": true})
+	})
+
+	req := httptest.NewRequest(http.MethodGet, "/v1beta/test", nil)
+	req.Header.Set("x-api-key", apiKey.Key)
+	rec := httptest.NewRecorder()
+	r.ServeHTTP(rec, req)
+
+	require.Equal(t, http.StatusOK, rec.Code)
+}
+
 func TestApiKeyAuthWithSubscriptionGoogle_QueryKeyAllowedOnV1Beta(t *testing.T) {
 	gin.SetMode(gin.TestMode)
 

backend/internal/server/middleware/api_key_auth_test.go

@@ -11,6 +11,7 @@ import (
 	"time"
 
 	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/ctxkey"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"github.com/Wei-Shaw/sub2api/internal/service"
 	"github.com/gin-gonic/gin"
@@ -25,6 +26,7 @@ func TestSimpleModeBypassesQuotaCheck(t *testing.T) {
 		ID:               42,
 		Name:             "sub",
 		Status:           service.StatusActive,
+		Hydrated:         true,
 		SubscriptionType: service.SubscriptionTypeSubscription,
 		DailyLimitUSD:    &limit,
 	}
@@ -110,6 +112,129 @@ func TestSimpleModeBypassesQuotaCheck(t *testing.T) {
 	})
 }
 
+func TestAPIKeyAuthSetsGroupContext(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	group := &service.Group{
+		ID:       101,
+		Name:     "g1",
+		Status:   service.StatusActive,
+		Platform: service.PlatformAnthropic,
+		Hydrated: true,
+	}
+	user := &service.User{
+		ID:          7,
+		Role:        service.RoleUser,
+		Status:      service.StatusActive,
+		Balance:     10,
+		Concurrency: 3,
+	}
+	apiKey := &service.APIKey{
+		ID:     100,
+		UserID: user.ID,
+		Key:    "test-key",
+		Status: service.StatusActive,
+		User:   user,
+		Group:  group,
+	}
+	apiKey.GroupID = &group.ID
+
+	apiKeyRepo := &stubApiKeyRepo{
+		getByKey: func(ctx context.Context, key string) (*service.APIKey, error) {
+			if key != apiKey.Key {
+				return nil, service.ErrAPIKeyNotFound
+			}
+			clone := *apiKey
+			return &clone, nil
+		},
+	}
+
+	cfg := &config.Config{RunMode: config.RunModeSimple}
+	apiKeyService := service.NewAPIKeyService(apiKeyRepo, nil, nil, nil, nil, cfg)
+	router := gin.New()
+	router.Use(gin.HandlerFunc(NewAPIKeyAuthMiddleware(apiKeyService, nil, cfg)))
+	router.GET("/t", func(c *gin.Context) {
+		groupFromCtx, ok := c.Request.Context().Value(ctxkey.Group).(*service.Group)
+		if !ok || groupFromCtx == nil || groupFromCtx.ID != group.ID {
+			c.JSON(http.StatusInternalServerError, gin.H{"ok": false})
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"ok": true})
+	})
+
+	w := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodGet, "/t", nil)
+	req.Header.Set("x-api-key", apiKey.Key)
+	router.ServeHTTP(w, req)
+
+	require.Equal(t, http.StatusOK, w.Code)
+}
+
+func TestAPIKeyAuthOverwritesInvalidContextGroup(t *testing.T) {
+	gin.SetMode(gin.TestMode)
+
+	group := &service.Group{
+		ID:       101,
+		Name:     "g1",
+		Status:   service.StatusActive,
+		Platform: service.PlatformAnthropic,
+		Hydrated: true,
+	}
+	user := &service.User{
+		ID:          7,
+		Role:        service.RoleUser,
+		Status:      service.StatusActive,
+		Balance:     10,
+		Concurrency: 3,
+	}
+	apiKey := &service.APIKey{
+		ID:     100,
+		UserID: user.ID,
+		Key:    "test-key",
+		Status: service.StatusActive,
+		User:   user,
+		Group:  group,
+	}
+	apiKey.GroupID = &group.ID
+
+	apiKeyRepo := &stubApiKeyRepo{
+		getByKey: func(ctx context.Context, key string) (*service.APIKey, error) {
+			if key != apiKey.Key {
+				return nil, service.ErrAPIKeyNotFound
+			}
+			clone := *apiKey
+			return &clone, nil
+		},
+	}
+
+	cfg := &config.Config{RunMode: config.RunModeSimple}
+	apiKeyService := service.NewAPIKeyService(apiKeyRepo, nil, nil, nil, nil, cfg)
+	router := gin.New()
+	router.Use(gin.HandlerFunc(NewAPIKeyAuthMiddleware(apiKeyService, nil, cfg)))
+
+	invalidGroup := &service.Group{
+		ID:       group.ID,
+		Platform: group.Platform,
+		Status:   group.Status,
+	}
+	router.GET("/t", func(c *gin.Context) {
+		groupFromCtx, ok := c.Request.Context().Value(ctxkey.Group).(*service.Group)
+		if !ok || groupFromCtx == nil || groupFromCtx.ID != group.ID || !groupFromCtx.Hydrated || groupFromCtx == invalidGroup {
+			c.JSON(http.StatusInternalServerError, gin.H{"ok": false})
+			return
+		}
+		c.JSON(http.StatusOK, gin.H{"ok": true})
+	})
+
+	w := httptest.NewRecorder()
+	req := httptest.NewRequest(http.MethodGet, "/t", nil)
+	req.Header.Set("x-api-key", apiKey.Key)
+	req = req.WithContext(context.WithValue(req.Context(), ctxkey.Group, invalidGroup))
+	router.ServeHTTP(w, req)
+
+	require.Equal(t, http.StatusOK, w.Code)
+}
+
 func newAuthTestRouter(apiKeyService *service.APIKeyService, subscriptionService *service.SubscriptionService, cfg *config.Config) *gin.Engine {
 	router := gin.New()
 	router.Use(gin.HandlerFunc(NewAPIKeyAuthMiddleware(apiKeyService, subscriptionService, cfg)))

backend/internal/server/router.go

@@ -1,6 +1,8 @@
 package server
 
 import (
+	"log"
+
 	"github.com/Wei-Shaw/sub2api/internal/config"
 	"github.com/Wei-Shaw/sub2api/internal/handler"
 	middleware2 "github.com/Wei-Shaw/sub2api/internal/server/middleware"
@@ -9,6 +11,7 @@ import (
 	"github.com/Wei-Shaw/sub2api/internal/web"
 
 	"github.com/gin-gonic/gin"
+	"github.com/redis/go-redis/v9"
 )
 
 // SetupRouter 配置路由器中间件和路由
@@ -21,20 +24,30 @@ func SetupRouter(
 	apiKeyService *service.APIKeyService,
 	subscriptionService *service.SubscriptionService,
 	opsService *service.OpsService,
+	settingService *service.SettingService,
 	cfg *config.Config,
+	redisClient *redis.Client,
 ) *gin.Engine {
 	// 应用中间件
 	r.Use(middleware2.Logger())
 	r.Use(middleware2.CORS(cfg.CORS))
 	r.Use(middleware2.SecurityHeaders(cfg.Security.CSP))
 
-	// Serve embedded frontend if available
+	// Serve embedded frontend with settings injection if available
 	if web.HasEmbeddedFrontend() {
-		r.Use(web.ServeEmbeddedFrontend())
+		frontendServer, err := web.NewFrontendServer(settingService)
+		if err != nil {
+			log.Printf("Warning: Failed to create frontend server with settings injection: %v, using legacy mode", err)
+			r.Use(web.ServeEmbeddedFrontend())
+		} else {
+			// Register cache invalidation callback
+			settingService.SetOnUpdateCallback(frontendServer.InvalidateCache)
+			r.Use(frontendServer.Middleware())
+		}
 	}
 
 	// 注册路由
-	registerRoutes(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, opsService, cfg)
+	registerRoutes(r, handlers, jwtAuth, adminAuth, apiKeyAuth, apiKeyService, subscriptionService, opsService, cfg, redisClient)
 
 	return r
 }
@@ -50,6 +63,7 @@ func registerRoutes(
 	subscriptionService *service.SubscriptionService,
 	opsService *service.OpsService,
 	cfg *config.Config,
+	redisClient *redis.Client,
 ) {
 	// 通用路由（健康检查、状态等）
 	routes.RegisterCommonRoutes(r)
@@ -58,7 +72,7 @@ func registerRoutes(
 	v1 := r.Group("/api/v1")
 
 	// 注册各模块路由
-	routes.RegisterAuthRoutes(v1, h, jwtAuth)
+	routes.RegisterAuthRoutes(v1, h, jwtAuth, redisClient)
 	routes.RegisterUserRoutes(v1, h, jwtAuth)
 	routes.RegisterAdminRoutes(v1, h, adminAuth)
 	routes.RegisterGatewayRoutes(r, h, apiKeyAuth, apiKeyService, subscriptionService, opsService, cfg)

backend/internal/server/routes/admin.go

@@ -44,6 +44,9 @@ func RegisterAdminRoutes(
 		// 卡密管理
 		registerRedeemCodeRoutes(admin, h)
 
+		// 优惠码管理
+		registerPromoCodeRoutes(admin, h)
+
 		// 系统设置
 		registerSettingsRoutes(admin, h)
 
@@ -252,6 +255,18 @@ func registerRedeemCodeRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 	}
 }
 
+func registerPromoCodeRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
+	promoCodes := admin.Group("/promo-codes")
+	{
+		promoCodes.GET("", h.Admin.Promo.List)
+		promoCodes.GET("/:id", h.Admin.Promo.GetByID)
+		promoCodes.POST("", h.Admin.Promo.Create)
+		promoCodes.PUT("/:id", h.Admin.Promo.Update)
+		promoCodes.DELETE("/:id", h.Admin.Promo.Delete)
+		promoCodes.GET("/:id/usages", h.Admin.Promo.GetUsages)
+	}
+}
+
 func registerSettingsRoutes(admin *gin.RouterGroup, h *handler.Handlers) {
 	adminSettings := admin.Group("/settings")
 	{

backend/internal/server/routes/auth.go

@@ -1,24 +1,34 @@
 package routes
 
 import (
+	"time"
+
 	"github.com/Wei-Shaw/sub2api/internal/handler"
-	"github.com/Wei-Shaw/sub2api/internal/server/middleware"
+	"github.com/Wei-Shaw/sub2api/internal/middleware"
+	servermiddleware "github.com/Wei-Shaw/sub2api/internal/server/middleware"
 
 	"github.com/gin-gonic/gin"
+	"github.com/redis/go-redis/v9"
 )
 
 // RegisterAuthRoutes 注册认证相关路由
 func RegisterAuthRoutes(
 	v1 *gin.RouterGroup,
 	h *handler.Handlers,
-	jwtAuth middleware.JWTAuthMiddleware,
+	jwtAuth servermiddleware.JWTAuthMiddleware,
+	redisClient *redis.Client,
 ) {
+	// 创建速率限制器
+	rateLimiter := middleware.NewRateLimiter(redisClient)
+
 	// 公开接口
 	auth := v1.Group("/auth")
 	{
 		auth.POST("/register", h.Auth.Register)
 		auth.POST("/login", h.Auth.Login)
 		auth.POST("/send-verify-code", h.Auth.SendVerifyCode)
+		// 优惠码验证接口添加速率限制：每分钟最多 10 次
+		auth.POST("/validate-promo-code", rateLimiter.Limit("validate-promo", 10, time.Minute), h.Auth.ValidatePromoCode)
 		auth.GET("/oauth/linuxdo/start", h.Auth.LinuxDoOAuthStart)
 		auth.GET("/oauth/linuxdo/callback", h.Auth.LinuxDoOAuthCallback)
 	}

backend/internal/service/admin_service.go

@@ -576,18 +576,33 @@ func (s *adminServiceImpl) validateFallbackGroup(ctx context.Context, currentGro
 		return fmt.Errorf("cannot set self as fallback group")
 	}
 
-	// 检查降级分组是否存在
-	fallbackGroup, err := s.groupRepo.GetByID(ctx, fallbackGroupID)
-	if err != nil {
-		return fmt.Errorf("fallback group not found: %w", err)
-	}
+	visited := map[int64]struct{}{}
+	nextID := fallbackGroupID
+	for {
+		if _, seen := visited[nextID]; seen {
+			return fmt.Errorf("fallback group cycle detected")
+		}
+		visited[nextID] = struct{}{}
+		if currentGroupID > 0 && nextID == currentGroupID {
+			return fmt.Errorf("fallback group cycle detected")
+		}
 
-	// 降级分组不能启用 claude_code_only，否则会造成死循环
-	if fallbackGroup.ClaudeCodeOnly {
-		return fmt.Errorf("fallback group cannot have claude_code_only enabled")
-	}
+		// 检查降级分组是否存在
+		fallbackGroup, err := s.groupRepo.GetByIDLite(ctx, nextID)
+		if err != nil {
+			return fmt.Errorf("fallback group not found: %w", err)
+		}
 
-	return nil
+		// 降级分组不能启用 claude_code_only，否则会造成死循环
+		if nextID == fallbackGroupID && fallbackGroup.ClaudeCodeOnly {
+			return fmt.Errorf("fallback group cannot have claude_code_only enabled")
+		}
+
+		if fallbackGroup.FallbackGroupID == nil {
+			return nil
+		}
+		nextID = *fallbackGroup.FallbackGroupID
+	}
 }
 
 func (s *adminServiceImpl) UpdateGroup(ctx context.Context, id int64, input *UpdateGroupInput) (*Group, error) {

backend/internal/service/admin_service_delete_test.go

@@ -107,6 +107,10 @@ func (s *groupRepoStub) GetByID(ctx context.Context, id int64) (*Group, error) {
 	panic("unexpected GetByID call")
 }
 
+func (s *groupRepoStub) GetByIDLite(ctx context.Context, id int64) (*Group, error) {
+	panic("unexpected GetByIDLite call")
+}
+
 func (s *groupRepoStub) Update(ctx context.Context, group *Group) error {
 	panic("unexpected Update call")
 }

backend/internal/service/admin_service_group_test.go

@@ -45,6 +45,13 @@ func (s *groupRepoStubForAdmin) GetByID(_ context.Context, _ int64) (*Group, err
 	return s.getByID, nil
 }
 
+func (s *groupRepoStubForAdmin) GetByIDLite(_ context.Context, _ int64) (*Group, error) {
+	if s.getErr != nil {
+		return nil, s.getErr
+	}
+	return s.getByID, nil
+}
+
 func (s *groupRepoStubForAdmin) Delete(_ context.Context, _ int64) error {
 	panic("unexpected Delete call")
 }
@@ -290,3 +297,84 @@ func TestAdminService_ListGroups_WithSearch(t *testing.T) {
 		require.True(t, *repo.listWithFiltersIsExclusive)
 	})
 }
+
+func TestAdminService_ValidateFallbackGroup_DetectsCycle(t *testing.T) {
+	groupID := int64(1)
+	fallbackID := int64(2)
+	repo := &groupRepoStubForFallbackCycle{
+		groups: map[int64]*Group{
+			groupID: {
+				ID:              groupID,
+				FallbackGroupID: &fallbackID,
+			},
+			fallbackID: {
+				ID:              fallbackID,
+				FallbackGroupID: &groupID,
+			},
+		},
+	}
+	svc := &adminServiceImpl{groupRepo: repo}
+
+	err := svc.validateFallbackGroup(context.Background(), groupID, fallbackID)
+	require.Error(t, err)
+	require.Contains(t, err.Error(), "fallback group cycle")
+}
+
+type groupRepoStubForFallbackCycle struct {
+	groups map[int64]*Group
+}
+
+func (s *groupRepoStubForFallbackCycle) Create(_ context.Context, _ *Group) error {
+	panic("unexpected Create call")
+}
+
+func (s *groupRepoStubForFallbackCycle) Update(_ context.Context, _ *Group) error {
+	panic("unexpected Update call")
+}
+
+func (s *groupRepoStubForFallbackCycle) GetByID(ctx context.Context, id int64) (*Group, error) {
+	return s.GetByIDLite(ctx, id)
+}
+
+func (s *groupRepoStubForFallbackCycle) GetByIDLite(_ context.Context, id int64) (*Group, error) {
+	if g, ok := s.groups[id]; ok {
+		return g, nil
+	}
+	return nil, ErrGroupNotFound
+}
+
+func (s *groupRepoStubForFallbackCycle) Delete(_ context.Context, _ int64) error {
+	panic("unexpected Delete call")
+}
+
+func (s *groupRepoStubForFallbackCycle) DeleteCascade(_ context.Context, _ int64) ([]int64, error) {
+	panic("unexpected DeleteCascade call")
+}
+
+func (s *groupRepoStubForFallbackCycle) List(_ context.Context, _ pagination.PaginationParams) ([]Group, *pagination.PaginationResult, error) {
+	panic("unexpected List call")
+}
+
+func (s *groupRepoStubForFallbackCycle) ListWithFilters(_ context.Context, _ pagination.PaginationParams, _, _, _ string, _ *bool) ([]Group, *pagination.PaginationResult, error) {
+	panic("unexpected ListWithFilters call")
+}
+
+func (s *groupRepoStubForFallbackCycle) ListActive(_ context.Context) ([]Group, error) {
+	panic("unexpected ListActive call")
+}
+
+func (s *groupRepoStubForFallbackCycle) ListActiveByPlatform(_ context.Context, _ string) ([]Group, error) {
+	panic("unexpected ListActiveByPlatform call")
+}
+
+func (s *groupRepoStubForFallbackCycle) ExistsByName(_ context.Context, _ string) (bool, error) {
+	panic("unexpected ExistsByName call")
+}
+
+func (s *groupRepoStubForFallbackCycle) GetAccountCount(_ context.Context, _ int64) (int64, error) {
+	panic("unexpected GetAccountCount call")
+}
+
+func (s *groupRepoStubForFallbackCycle) DeleteAccountGroupsByGroupID(_ context.Context, _ int64) (int64, error) {
+	panic("unexpected DeleteAccountGroupsByGroupID call")
+}

backend/internal/service/auth_service.go

@@ -35,9 +35,6 @@ var (
 // maxTokenLength 限制 token 大小，避免超长 header 触发解析时的异常内存分配。
 const maxTokenLength = 8192
 
-// LinuxDoConnectSyntheticEmailDomain LinuxDo Connect 生成的合成邮箱域名后缀
-const LinuxDoConnectSyntheticEmailDomain = "@linuxdo.synthetic"
-
 // JWTClaims JWT载荷数据
 type JWTClaims struct {
 	UserID       int64  `json:"user_id"`
@@ -55,6 +52,7 @@ type AuthService struct {
 	emailService      *EmailService
 	turnstileService  *TurnstileService
 	emailQueueService *EmailQueueService
+	promoService      *PromoService
 }
 
 // NewAuthService 创建认证服务实例
@@ -65,6 +63,7 @@ func NewAuthService(
 	emailService *EmailService,
 	turnstileService *TurnstileService,
 	emailQueueService *EmailQueueService,
+	promoService *PromoService,
 ) *AuthService {
 	return &AuthService{
 		userRepo:          userRepo,
@@ -73,16 +72,17 @@ func NewAuthService(
 		emailService:      emailService,
 		turnstileService:  turnstileService,
 		emailQueueService: emailQueueService,
+		promoService:      promoService,
 	}
 }
 
 // Register 用户注册，返回token和用户
 func (s *AuthService) Register(ctx context.Context, email, password string) (string, *User, error) {
-	return s.RegisterWithVerification(ctx, email, password, "")
+	return s.RegisterWithVerification(ctx, email, password, "", "")
 }
 
-// RegisterWithVerification 用户注册（支持邮件验证），返回token和用户
-func (s *AuthService) RegisterWithVerification(ctx context.Context, email, password, verifyCode string) (string, *User, error) {
+// RegisterWithVerification 用户注册（支持邮件验证和优惠码），返回token和用户
+func (s *AuthService) RegisterWithVerification(ctx context.Context, email, password, verifyCode, promoCode string) (string, *User, error) {
 	// 检查是否开放注册（默认关闭：settingService 未配置时不允许注册）
 	if s.settingService == nil || !s.settingService.IsRegistrationEnabled(ctx) {
 		return "", nil, ErrRegDisabled
@@ -153,6 +153,19 @@ func (s *AuthService) RegisterWithVerification(ctx context.Context, email, passw
 		return "", nil, ErrServiceUnavailable
 	}
 
+	// 应用优惠码（如果提供）
+	if promoCode != "" && s.promoService != nil {
+		if err := s.promoService.ApplyPromoCode(ctx, user.ID, promoCode); err != nil {
+			// 优惠码应用失败不影响注册，只记录日志
+			log.Printf("[Auth] Failed to apply promo code for user %d: %v", user.ID, err)
+		} else {
+			// 重新获取用户信息以获取更新后的余额
+			if updatedUser, err := s.userRepo.GetByID(ctx, user.ID); err == nil {
+				user = updatedUser
+			}
+		}
+	}
+
 	// 生成token
 	token, err := s.GenerateToken(user)
 	if err != nil {

backend/internal/service/auth_service_register_test.go

@@ -100,6 +100,7 @@ func newAuthService(repo *userRepoStub, settings map[string]string, emailCache E
 		emailService,
 		nil,
 		nil,
+		nil, // promoService
 	)
 }
 
@@ -131,7 +132,7 @@ func TestAuthService_Register_EmailVerifyEnabledButServiceNotConfigured(t *testi
 	}, nil)
 
 	// 应返回服务不可用错误，而不是允许绕过验证
-	_, _, err := service.RegisterWithVerification(context.Background(), "user@test.com", "password", "any-code")
+	_, _, err := service.RegisterWithVerification(context.Background(), "user@test.com", "password", "any-code", "")
 	require.ErrorIs(t, err, ErrServiceUnavailable)
 }
 
@@ -143,7 +144,7 @@ func TestAuthService_Register_EmailVerifyRequired(t *testing.T) {
 		SettingKeyEmailVerifyEnabled:  "true",
 	}, cache)
 
-	_, _, err := service.RegisterWithVerification(context.Background(), "user@test.com", "password", "")
+	_, _, err := service.RegisterWithVerification(context.Background(), "user@test.com", "password", "", "")
 	require.ErrorIs(t, err, ErrEmailVerifyRequired)
 }
 
@@ -157,7 +158,7 @@ func TestAuthService_Register_EmailVerifyInvalid(t *testing.T) {
 		SettingKeyEmailVerifyEnabled:  "true",
 	}, cache)
 
-	_, _, err := service.RegisterWithVerification(context.Background(), "user@test.com", "password", "wrong")
+	_, _, err := service.RegisterWithVerification(context.Background(), "user@test.com", "password", "wrong", "")
 	require.ErrorIs(t, err, ErrInvalidVerifyCode)
 	require.ErrorContains(t, err, "verify code")
 }

backend/internal/service/domain_constants.go

@@ -38,6 +38,12 @@ const (
 	RedeemTypeSubscription = "subscription"
 )
 
+// PromoCode status constants
+const (
+	PromoCodeStatusActive   = "active"
+	PromoCodeStatusDisabled = "disabled"
+)
+
 // Admin adjustment type constants
 const (
 	AdjustmentTypeAdminBalance     = "admin_balance"     // 管理员调整余额
@@ -57,6 +63,9 @@ const (
 	SubscriptionStatusSuspended = "suspended"
 )
 
+// LinuxDoConnectSyntheticEmailDomain 是 LinuxDo Connect 用户的合成邮箱后缀（RFC 保留域名）。
+const LinuxDoConnectSyntheticEmailDomain = "@linuxdo-connect.invalid"
+
 // Setting keys
 const (
 	// 注册设置
@@ -90,6 +99,7 @@ const (
 	SettingKeyAPIBaseURL   = "api_base_url"  // API端点地址（用于客户端配置和导入）
 	SettingKeyContactInfo  = "contact_info"  // 客服联系方式
 	SettingKeyDocURL       = "doc_url"       // 文档链接
+	SettingKeyHomeContent  = "home_content"  // 首页内容（支持 Markdown/HTML，或 URL 作为 iframe src）
 
 	// 默认配置
 	SettingKeyDefaultConcurrency = "default_concurrency" // 新用户默认并发量

backend/internal/service/gateway_multiplatform_test.go

@@ -9,6 +9,7 @@ import (
 	"time"
 
 	"github.com/Wei-Shaw/sub2api/internal/config"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/ctxkey"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"github.com/stretchr/testify/require"
 )
@@ -23,9 +24,11 @@ type mockAccountRepoForPlatform struct {
 	accounts         []Account
 	accountsByID     map[int64]*Account
 	listPlatformFunc func(ctx context.Context, platform string) ([]Account, error)
+	getByIDCalls     int
 }
 
 func (m *mockAccountRepoForPlatform) GetByID(ctx context.Context, id int64) (*Account, error) {
+	m.getByIDCalls++
 	if acc, ok := m.accountsByID[id]; ok {
 		return acc, nil
 	}
@@ -191,6 +194,56 @@ func (m *mockGatewayCacheForPlatform) RefreshSessionTTL(ctx context.Context, gro
 	return nil
 }
 
+type mockGroupRepoForGateway struct {
+	groups           map[int64]*Group
+	getByIDCalls     int
+	getByIDLiteCalls int
+}
+
+func (m *mockGroupRepoForGateway) GetByID(ctx context.Context, id int64) (*Group, error) {
+	m.getByIDCalls++
+	if g, ok := m.groups[id]; ok {
+		return g, nil
+	}
+	return nil, ErrGroupNotFound
+}
+
+func (m *mockGroupRepoForGateway) GetByIDLite(ctx context.Context, id int64) (*Group, error) {
+	m.getByIDLiteCalls++
+	if g, ok := m.groups[id]; ok {
+		return g, nil
+	}
+	return nil, ErrGroupNotFound
+}
+
+func (m *mockGroupRepoForGateway) Create(ctx context.Context, group *Group) error { return nil }
+func (m *mockGroupRepoForGateway) Update(ctx context.Context, group *Group) error { return nil }
+func (m *mockGroupRepoForGateway) Delete(ctx context.Context, id int64) error     { return nil }
+func (m *mockGroupRepoForGateway) DeleteCascade(ctx context.Context, id int64) ([]int64, error) {
+	return nil, nil
+}
+func (m *mockGroupRepoForGateway) List(ctx context.Context, params pagination.PaginationParams) ([]Group, *pagination.PaginationResult, error) {
+	return nil, nil, nil
+}
+func (m *mockGroupRepoForGateway) ListWithFilters(ctx context.Context, params pagination.PaginationParams, platform, status, search string, isExclusive *bool) ([]Group, *pagination.PaginationResult, error) {
+	return nil, nil, nil
+}
+func (m *mockGroupRepoForGateway) ListActive(ctx context.Context) ([]Group, error) {
+	return nil, nil
+}
+func (m *mockGroupRepoForGateway) ListActiveByPlatform(ctx context.Context, platform string) ([]Group, error) {
+	return nil, nil
+}
+func (m *mockGroupRepoForGateway) ExistsByName(ctx context.Context, name string) (bool, error) {
+	return false, nil
+}
+func (m *mockGroupRepoForGateway) GetAccountCount(ctx context.Context, groupID int64) (int64, error) {
+	return 0, nil
+}
+func (m *mockGroupRepoForGateway) DeleteAccountGroupsByGroupID(ctx context.Context, groupID int64) (int64, error) {
+	return 0, nil
+}
+
 func ptr[T any](v T) *T {
 	return &v
 }
@@ -897,6 +950,74 @@ func (m *mockConcurrencyService) GetAccountWaitingCount(ctx context.Context, acc
 	return m.accountWaitCounts[accountID], nil
 }
 
+type mockConcurrencyCache struct {
+	acquireAccountCalls int
+	loadBatchCalls      int
+}
+
+func (m *mockConcurrencyCache) AcquireAccountSlot(ctx context.Context, accountID int64, maxConcurrency int, requestID string) (bool, error) {
+	m.acquireAccountCalls++
+	return true, nil
+}
+
+func (m *mockConcurrencyCache) ReleaseAccountSlot(ctx context.Context, accountID int64, requestID string) error {
+	return nil
+}
+
+func (m *mockConcurrencyCache) GetAccountConcurrency(ctx context.Context, accountID int64) (int, error) {
+	return 0, nil
+}
+
+func (m *mockConcurrencyCache) IncrementAccountWaitCount(ctx context.Context, accountID int64, maxWait int) (bool, error) {
+	return true, nil
+}
+
+func (m *mockConcurrencyCache) DecrementAccountWaitCount(ctx context.Context, accountID int64) error {
+	return nil
+}
+
+func (m *mockConcurrencyCache) GetAccountWaitingCount(ctx context.Context, accountID int64) (int, error) {
+	return 0, nil
+}
+
+func (m *mockConcurrencyCache) AcquireUserSlot(ctx context.Context, userID int64, maxConcurrency int, requestID string) (bool, error) {
+	return true, nil
+}
+
+func (m *mockConcurrencyCache) ReleaseUserSlot(ctx context.Context, userID int64, requestID string) error {
+	return nil
+}
+
+func (m *mockConcurrencyCache) GetUserConcurrency(ctx context.Context, userID int64) (int, error) {
+	return 0, nil
+}
+
+func (m *mockConcurrencyCache) IncrementWaitCount(ctx context.Context, userID int64, maxWait int) (bool, error) {
+	return true, nil
+}
+
+func (m *mockConcurrencyCache) DecrementWaitCount(ctx context.Context, userID int64) error {
+	return nil
+}
+
+func (m *mockConcurrencyCache) GetAccountsLoadBatch(ctx context.Context, accounts []AccountWithConcurrency) (map[int64]*AccountLoadInfo, error) {
+	m.loadBatchCalls++
+	result := make(map[int64]*AccountLoadInfo, len(accounts))
+	for _, acc := range accounts {
+		result[acc.ID] = &AccountLoadInfo{
+			AccountID:          acc.ID,
+			CurrentConcurrency: 0,
+			WaitingCount:       0,
+			LoadRate:           0,
+		}
+	}
+	return result, nil
+}
+
+func (m *mockConcurrencyCache) CleanupExpiredAccountSlots(ctx context.Context, accountID int64) error {
+	return nil
+}
+
 // TestGatewayService_SelectAccountWithLoadAwareness tests load-aware account selection
 func TestGatewayService_SelectAccountWithLoadAwareness(t *testing.T) {
 	ctx := context.Background()
@@ -995,6 +1116,78 @@ func TestGatewayService_SelectAccountWithLoadAwareness(t *testing.T) {
 		require.Equal(t, int64(2), result.Account.ID, "不应选择被排除的账号")
 	})
 
+	t.Run("粘性命中-不调用GetByID", func(t *testing.T) {
+		repo := &mockAccountRepoForPlatform{
+			accounts: []Account{
+				{ID: 1, Platform: PlatformAnthropic, Priority: 1, Status: StatusActive, Schedulable: true, Concurrency: 5},
+			},
+			accountsByID: map[int64]*Account{},
+		}
+		for i := range repo.accounts {
+			repo.accountsByID[repo.accounts[i].ID] = &repo.accounts[i]
+		}
+
+		cache := &mockGatewayCacheForPlatform{
+			sessionBindings: map[string]int64{"sticky": 1},
+		}
+
+		cfg := testConfig()
+		cfg.Gateway.Scheduling.LoadBatchEnabled = true
+
+		concurrencyCache := &mockConcurrencyCache{}
+
+		svc := &GatewayService{
+			accountRepo:        repo,
+			cache:              cache,
+			cfg:                cfg,
+			concurrencyService: NewConcurrencyService(concurrencyCache),
+		}
+
+		result, err := svc.SelectAccountWithLoadAwareness(ctx, nil, "sticky", "claude-3-5-sonnet-20241022", nil)
+		require.NoError(t, err)
+		require.NotNil(t, result)
+		require.NotNil(t, result.Account)
+		require.Equal(t, int64(1), result.Account.ID)
+		require.Equal(t, 0, repo.getByIDCalls, "粘性命中不应调用GetByID")
+		require.Equal(t, 0, concurrencyCache.loadBatchCalls, "粘性命中应在负载批量查询前返回")
+	})
+
+	t.Run("粘性账号不在候选集-回退负载感知选择", func(t *testing.T) {
+		repo := &mockAccountRepoForPlatform{
+			accounts: []Account{
+				{ID: 2, Platform: PlatformAnthropic, Priority: 1, Status: StatusActive, Schedulable: true, Concurrency: 5},
+			},
+			accountsByID: map[int64]*Account{},
+		}
+		for i := range repo.accounts {
+			repo.accountsByID[repo.accounts[i].ID] = &repo.accounts[i]
+		}
+
+		cache := &mockGatewayCacheForPlatform{
+			sessionBindings: map[string]int64{"sticky": 1},
+		}
+
+		cfg := testConfig()
+		cfg.Gateway.Scheduling.LoadBatchEnabled = true
+
+		concurrencyCache := &mockConcurrencyCache{}
+
+		svc := &GatewayService{
+			accountRepo:        repo,
+			cache:              cache,
+			cfg:                cfg,
+			concurrencyService: NewConcurrencyService(concurrencyCache),
+		}
+
+		result, err := svc.SelectAccountWithLoadAwareness(ctx, nil, "sticky", "claude-3-5-sonnet-20241022", nil)
+		require.NoError(t, err)
+		require.NotNil(t, result)
+		require.NotNil(t, result.Account)
+		require.Equal(t, int64(2), result.Account.ID, "粘性账号不在候选集时应回退到可用账号")
+		require.Equal(t, 0, repo.getByIDCalls, "粘性账号缺失不应回退到GetByID")
+		require.Equal(t, 1, concurrencyCache.loadBatchCalls, "应继续进行负载批量查询")
+	})
+
 	t.Run("无可用账号-返回错误", func(t *testing.T) {
 		repo := &mockAccountRepoForPlatform{
 			accounts:     []Account{},
@@ -1019,3 +1212,190 @@ func TestGatewayService_SelectAccountWithLoadAwareness(t *testing.T) {
 		require.Contains(t, err.Error(), "no available accounts")
 	})
 }
+
+func TestGatewayService_GroupResolution_ReusesContextGroup(t *testing.T) {
+	ctx := context.Background()
+	groupID := int64(42)
+	group := &Group{
+		ID:       groupID,
+		Platform: PlatformAnthropic,
+		Status:   StatusActive,
+		Hydrated: true,
+	}
+	ctx = context.WithValue(ctx, ctxkey.Group, group)
+
+	repo := &mockAccountRepoForPlatform{
+		accounts: []Account{
+			{ID: 1, Platform: PlatformAnthropic, Priority: 1, Status: StatusActive, Schedulable: true},
+		},
+		accountsByID: map[int64]*Account{},
+	}
+	for i := range repo.accounts {
+		repo.accountsByID[repo.accounts[i].ID] = &repo.accounts[i]
+	}
+
+	groupRepo := &mockGroupRepoForGateway{
+		groups: map[int64]*Group{groupID: group},
+	}
+
+	svc := &GatewayService{
+		accountRepo: repo,
+		groupRepo:   groupRepo,
+		cfg:         testConfig(),
+	}
+
+	account, err := svc.SelectAccountForModelWithExclusions(ctx, &groupID, "", "claude-3-5-sonnet-20241022", nil)
+	require.NoError(t, err)
+	require.NotNil(t, account)
+	require.Equal(t, 0, groupRepo.getByIDCalls)
+	require.Equal(t, 0, groupRepo.getByIDLiteCalls)
+}
+
+func TestGatewayService_GroupResolution_IgnoresInvalidContextGroup(t *testing.T) {
+	ctx := context.Background()
+	groupID := int64(42)
+	ctxGroup := &Group{
+		ID:       groupID,
+		Platform: PlatformAnthropic,
+		Status:   StatusActive,
+	}
+	ctx = context.WithValue(ctx, ctxkey.Group, ctxGroup)
+
+	repo := &mockAccountRepoForPlatform{
+		accounts: []Account{
+			{ID: 1, Platform: PlatformAnthropic, Priority: 1, Status: StatusActive, Schedulable: true},
+		},
+		accountsByID: map[int64]*Account{},
+	}
+	for i := range repo.accounts {
+		repo.accountsByID[repo.accounts[i].ID] = &repo.accounts[i]
+	}
+
+	group := &Group{
+		ID:       groupID,
+		Platform: PlatformAnthropic,
+		Status:   StatusActive,
+	}
+	groupRepo := &mockGroupRepoForGateway{
+		groups: map[int64]*Group{groupID: group},
+	}
+
+	svc := &GatewayService{
+		accountRepo: repo,
+		groupRepo:   groupRepo,
+		cfg:         testConfig(),
+	}
+
+	account, err := svc.SelectAccountForModelWithExclusions(ctx, &groupID, "", "claude-3-5-sonnet-20241022", nil)
+	require.NoError(t, err)
+	require.NotNil(t, account)
+	require.Equal(t, 0, groupRepo.getByIDCalls)
+	require.Equal(t, 1, groupRepo.getByIDLiteCalls)
+}
+
+func TestGatewayService_GroupContext_OverwritesInvalidContextGroup(t *testing.T) {
+	groupID := int64(42)
+	invalidGroup := &Group{
+		ID:       groupID,
+		Platform: PlatformAnthropic,
+		Status:   StatusActive,
+	}
+	hydratedGroup := &Group{
+		ID:       groupID,
+		Platform: PlatformAnthropic,
+		Status:   StatusActive,
+		Hydrated: true,
+	}
+
+	ctx := context.WithValue(context.Background(), ctxkey.Group, invalidGroup)
+	svc := &GatewayService{}
+	ctx = svc.withGroupContext(ctx, hydratedGroup)
+
+	got, ok := ctx.Value(ctxkey.Group).(*Group)
+	require.True(t, ok)
+	require.Same(t, hydratedGroup, got)
+}
+
+func TestGatewayService_GroupResolution_FallbackUsesLiteOnce(t *testing.T) {
+	ctx := context.Background()
+	groupID := int64(10)
+	fallbackID := int64(11)
+	group := &Group{
+		ID:              groupID,
+		Platform:        PlatformAnthropic,
+		Status:          StatusActive,
+		ClaudeCodeOnly:  true,
+		FallbackGroupID: &fallbackID,
+		Hydrated:        true,
+	}
+	fallbackGroup := &Group{
+		ID:       fallbackID,
+		Platform: PlatformAnthropic,
+		Status:   StatusActive,
+	}
+	ctx = context.WithValue(ctx, ctxkey.Group, group)
+
+	repo := &mockAccountRepoForPlatform{
+		accounts: []Account{
+			{ID: 1, Platform: PlatformAnthropic, Priority: 1, Status: StatusActive, Schedulable: true},
+		},
+		accountsByID: map[int64]*Account{},
+	}
+	for i := range repo.accounts {
+		repo.accountsByID[repo.accounts[i].ID] = &repo.accounts[i]
+	}
+
+	groupRepo := &mockGroupRepoForGateway{
+		groups: map[int64]*Group{fallbackID: fallbackGroup},
+	}
+
+	svc := &GatewayService{
+		accountRepo: repo,
+		groupRepo:   groupRepo,
+		cfg:         testConfig(),
+	}
+
+	account, err := svc.SelectAccountForModelWithExclusions(ctx, &groupID, "", "claude-3-5-sonnet-20241022", nil)
+	require.NoError(t, err)
+	require.NotNil(t, account)
+	require.Equal(t, 0, groupRepo.getByIDCalls)
+	require.Equal(t, 1, groupRepo.getByIDLiteCalls)
+}
+
+func TestGatewayService_ResolveGatewayGroup_DetectsFallbackCycle(t *testing.T) {
+	ctx := context.Background()
+	groupID := int64(10)
+	fallbackID := int64(11)
+
+	group := &Group{
+		ID:              groupID,
+		Platform:        PlatformAnthropic,
+		Status:          StatusActive,
+		ClaudeCodeOnly:  true,
+		FallbackGroupID: &fallbackID,
+	}
+	fallbackGroup := &Group{
+		ID:              fallbackID,
+		Platform:        PlatformAnthropic,
+		Status:          StatusActive,
+		ClaudeCodeOnly:  true,
+		FallbackGroupID: &groupID,
+	}
+
+	groupRepo := &mockGroupRepoForGateway{
+		groups: map[int64]*Group{
+			groupID:    group,
+			fallbackID: fallbackGroup,
+		},
+	}
+
+	svc := &GatewayService{
+		groupRepo: groupRepo,
+	}
+
+	gotGroup, gotID, err := svc.resolveGatewayGroup(ctx, &groupID)
+	require.Error(t, err)
+	require.Nil(t, gotGroup)
+	require.Nil(t, gotID)
+	require.Contains(t, err.Error(), "fallback group cycle")
+}

backend/internal/service/gateway_service.go

@@ -361,27 +361,13 @@ func (s *GatewayService) SelectAccountForModelWithExclusions(ctx context.Context
 	if hasForcePlatform && forcePlatform != "" {
 		platform = forcePlatform
 	} else if groupID != nil {
-		// 根据分组 platform 决定查询哪种账号
-		group, err := s.groupRepo.GetByID(ctx, *groupID)
+		group, resolvedGroupID, err := s.resolveGatewayGroup(ctx, groupID)
 		if err != nil {
-			return nil, fmt.Errorf("get group failed: %w", err)
+			return nil, err
 		}
+		groupID = resolvedGroupID
+		ctx = s.withGroupContext(ctx, group)
 		platform = group.Platform
-
-		// 检查 Claude Code 客户端限制
-		if group.ClaudeCodeOnly {
-			isClaudeCode := IsClaudeCodeClient(ctx)
-			if !isClaudeCode {
-				// 非 Claude Code 客户端，检查是否有降级分组
-				if group.FallbackGroupID != nil {
-					// 使用降级分组重新调度
-					fallbackGroupID := *group.FallbackGroupID
-					return s.SelectAccountForModelWithExclusions(ctx, &fallbackGroupID, sessionHash, requestedModel, excludedIDs)
-				}
-				// 无降级分组，拒绝访问
-				return nil, ErrClaudeCodeOnly
-			}
-		}
 	} else {
 		// 无分组时只使用原生 anthropic 平台
 		platform = PlatformAnthropic
@@ -409,10 +395,11 @@ func (s *GatewayService) SelectAccountWithLoadAwareness(ctx context.Context, gro
 	}
 
 	// 检查 Claude Code 客户端限制（可能会替换 groupID 为降级分组）
-	groupID, err := s.checkClaudeCodeRestriction(ctx, groupID)
+	group, groupID, err := s.checkClaudeCodeRestriction(ctx, groupID)
 	if err != nil {
 		return nil, err
 	}
+	ctx = s.withGroupContext(ctx, group)
 
 	if s.concurrencyService == nil || !cfg.LoadBatchEnabled {
 		account, err := s.SelectAccountForModelWithExclusions(ctx, groupID, sessionHash, requestedModel, excludedIDs)
@@ -452,7 +439,7 @@ func (s *GatewayService) SelectAccountWithLoadAwareness(ctx context.Context, gro
 		}, nil
 	}
 
-	platform, hasForcePlatform, err := s.resolvePlatform(ctx, groupID)
+	platform, hasForcePlatform, err := s.resolvePlatform(ctx, groupID, group)
 	if err != nil {
 		return nil, err
 	}
@@ -478,8 +465,13 @@ func (s *GatewayService) SelectAccountWithLoadAwareness(ctx context.Context, gro
 	if sessionHash != "" && s.cache != nil {
 		accountID, err := s.cache.GetSessionAccountID(ctx, derefGroupID(groupID), sessionHash)
 		if err == nil && accountID > 0 && !isExcluded(accountID) {
-			account, err := s.accountRepo.GetByID(ctx, accountID)
-			if err == nil && s.isAccountInGroup(account, groupID) &&
+			// 粘性命中仅在当前可调度候选集中生效。
+			accountByID := make(map[int64]*Account, len(accounts))
+			for i := range accounts {
+				accountByID[accounts[i].ID] = &accounts[i]
+			}
+			account, ok := accountByID[accountID]
+			if ok && s.isAccountInGroup(account, groupID) &&
 				s.isAccountAllowedForPlatform(account, platform, useMixed) &&
 				account.IsSchedulableForModel(requestedModel) &&
 				(requestedModel == "" || s.isModelSupportedByAccount(account, requestedModel)) {
@@ -655,51 +647,97 @@ func (s *GatewayService) schedulingConfig() config.GatewaySchedulingConfig {
 	}
 }
 
+func (s *GatewayService) withGroupContext(ctx context.Context, group *Group) context.Context {
+	if !IsGroupContextValid(group) {
+		return ctx
+	}
+	if existing, ok := ctx.Value(ctxkey.Group).(*Group); ok && existing != nil && existing.ID == group.ID && IsGroupContextValid(existing) {
+		return ctx
+	}
+	return context.WithValue(ctx, ctxkey.Group, group)
+}
+
+func (s *GatewayService) groupFromContext(ctx context.Context, groupID int64) *Group {
+	if group, ok := ctx.Value(ctxkey.Group).(*Group); ok && IsGroupContextValid(group) && group.ID == groupID {
+		return group
+	}
+	return nil
+}
+
+func (s *GatewayService) resolveGroupByID(ctx context.Context, groupID int64) (*Group, error) {
+	if group := s.groupFromContext(ctx, groupID); group != nil {
+		return group, nil
+	}
+	group, err := s.groupRepo.GetByIDLite(ctx, groupID)
+	if err != nil {
+		return nil, fmt.Errorf("get group failed: %w", err)
+	}
+	return group, nil
+}
+
+func (s *GatewayService) resolveGatewayGroup(ctx context.Context, groupID *int64) (*Group, *int64, error) {
+	if groupID == nil {
+		return nil, nil, nil
+	}
+
+	currentID := *groupID
+	visited := map[int64]struct{}{}
+	for {
+		if _, seen := visited[currentID]; seen {
+			return nil, nil, fmt.Errorf("fallback group cycle detected")
+		}
+		visited[currentID] = struct{}{}
+
+		group, err := s.resolveGroupByID(ctx, currentID)
+		if err != nil {
+			return nil, nil, err
+		}
+
+		if !group.ClaudeCodeOnly || IsClaudeCodeClient(ctx) {
+			return group, &currentID, nil
+		}
+
+		if group.FallbackGroupID == nil {
+			return nil, nil, ErrClaudeCodeOnly
+		}
+		currentID = *group.FallbackGroupID
+	}
+}
+
 // checkClaudeCodeRestriction 检查分组的 Claude Code 客户端限制
 // 如果分组启用了 claude_code_only 且请求不是来自 Claude Code 客户端：
 //   - 有降级分组：返回降级分组的 ID
 //   - 无降级分组：返回 ErrClaudeCodeOnly 错误
-func (s *GatewayService) checkClaudeCodeRestriction(ctx context.Context, groupID *int64) (*int64, error) {
+func (s *GatewayService) checkClaudeCodeRestriction(ctx context.Context, groupID *int64) (*Group, *int64, error) {
 	if groupID == nil {
-		return groupID, nil
+		return nil, groupID, nil
 	}
 
 	// 强制平台模式不检查 Claude Code 限制
 	if _, hasForcePlatform := ctx.Value(ctxkey.ForcePlatform).(string); hasForcePlatform {
-		return groupID, nil
+		return nil, groupID, nil
 	}
 
-	group, err := s.groupRepo.GetByID(ctx, *groupID)
+	group, resolvedID, err := s.resolveGatewayGroup(ctx, groupID)
 	if err != nil {
-		return nil, fmt.Errorf("get group failed: %w", err)
+		return nil, nil, err
 	}
 
-	if !group.ClaudeCodeOnly {
-		return groupID, nil
-	}
-
-	// 分组启用了 Claude Code 限制
-	if IsClaudeCodeClient(ctx) {
-		return groupID, nil
-	}
-
-	// 非 Claude Code 客户端，检查降级分组
-	if group.FallbackGroupID != nil {
-		return group.FallbackGroupID, nil
-	}
-
-	return nil, ErrClaudeCodeOnly
+	return group, resolvedID, nil
 }
 
-func (s *GatewayService) resolvePlatform(ctx context.Context, groupID *int64) (string, bool, error) {
+func (s *GatewayService) resolvePlatform(ctx context.Context, groupID *int64, group *Group) (string, bool, error) {
 	forcePlatform, hasForcePlatform := ctx.Value(ctxkey.ForcePlatform).(string)
 	if hasForcePlatform && forcePlatform != "" {
 		return forcePlatform, true, nil
 	}
+	if group != nil {
+		return group.Platform, false, nil
+	}
 	if groupID != nil {
-		group, err := s.groupRepo.GetByID(ctx, *groupID)
+		group, err := s.resolveGroupByID(ctx, *groupID)
 		if err != nil {
-			return "", false, fmt.Errorf("get group failed: %w", err)
+			return "", false, err
 		}
 		return group.Platform, false, nil
 	}

backend/internal/service/gemini_messages_compat_service.go

@@ -86,9 +86,15 @@ func (s *GeminiMessagesCompatService) SelectAccountForModelWithExclusions(ctx co
 		platform = forcePlatform
 	} else if groupID != nil {
 		// 根据分组 platform 决定查询哪种账号
-		group, err := s.groupRepo.GetByID(ctx, *groupID)
-		if err != nil {
-			return nil, fmt.Errorf("get group failed: %w", err)
+		var group *Group
+		if ctxGroup, ok := ctx.Value(ctxkey.Group).(*Group); ok && IsGroupContextValid(ctxGroup) && ctxGroup.ID == *groupID {
+			group = ctxGroup
+		} else {
+			var err error
+			group, err = s.groupRepo.GetByIDLite(ctx, *groupID)
+			if err != nil {
+				return nil, fmt.Errorf("get group failed: %w", err)
+			}
 		}
 		platform = group.Platform
 	} else {

backend/internal/service/gemini_multiplatform_test.go

@@ -8,6 +8,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/Wei-Shaw/sub2api/internal/pkg/ctxkey"
 	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
 	"github.com/stretchr/testify/require"
 )
@@ -152,10 +153,21 @@ var _ AccountRepository = (*mockAccountRepoForGemini)(nil)
 
 // mockGroupRepoForGemini Gemini 测试用的 group repo mock
 type mockGroupRepoForGemini struct {
-	groups map[int64]*Group
+	groups           map[int64]*Group
+	getByIDCalls     int
+	getByIDLiteCalls int
 }
 
 func (m *mockGroupRepoForGemini) GetByID(ctx context.Context, id int64) (*Group, error) {
+	m.getByIDCalls++
+	if g, ok := m.groups[id]; ok {
+		return g, nil
+	}
+	return nil, errors.New("group not found")
+}
+
+func (m *mockGroupRepoForGemini) GetByIDLite(ctx context.Context, id int64) (*Group, error) {
+	m.getByIDLiteCalls++
 	if g, ok := m.groups[id]; ok {
 		return g, nil
 	}
@@ -248,6 +260,77 @@ func TestGeminiMessagesCompatService_SelectAccountForModelWithExclusions_GeminiP
 	require.Equal(t, PlatformGemini, acc.Platform, "无分组时应只返回 gemini 平台账户")
 }
 
+func TestGeminiMessagesCompatService_GroupResolution_ReusesContextGroup(t *testing.T) {
+	ctx := context.Background()
+	groupID := int64(7)
+	group := &Group{
+		ID:       groupID,
+		Platform: PlatformGemini,
+		Status:   StatusActive,
+		Hydrated: true,
+	}
+	ctx = context.WithValue(ctx, ctxkey.Group, group)
+
+	repo := &mockAccountRepoForGemini{
+		accounts: []Account{
+			{ID: 1, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true},
+		},
+		accountsByID: map[int64]*Account{},
+	}
+	for i := range repo.accounts {
+		repo.accountsByID[repo.accounts[i].ID] = &repo.accounts[i]
+	}
+
+	cache := &mockGatewayCacheForGemini{}
+	groupRepo := &mockGroupRepoForGemini{groups: map[int64]*Group{}}
+
+	svc := &GeminiMessagesCompatService{
+		accountRepo: repo,
+		groupRepo:   groupRepo,
+		cache:       cache,
+	}
+
+	acc, err := svc.SelectAccountForModelWithExclusions(ctx, &groupID, "", "gemini-2.5-flash", nil)
+	require.NoError(t, err)
+	require.NotNil(t, acc)
+	require.Equal(t, 0, groupRepo.getByIDCalls)
+	require.Equal(t, 0, groupRepo.getByIDLiteCalls)
+}
+
+func TestGeminiMessagesCompatService_GroupResolution_UsesLiteFetch(t *testing.T) {
+	ctx := context.Background()
+	groupID := int64(7)
+
+	repo := &mockAccountRepoForGemini{
+		accounts: []Account{
+			{ID: 1, Platform: PlatformGemini, Priority: 1, Status: StatusActive, Schedulable: true},
+		},
+		accountsByID: map[int64]*Account{},
+	}
+	for i := range repo.accounts {
+		repo.accountsByID[repo.accounts[i].ID] = &repo.accounts[i]
+	}
+
+	cache := &mockGatewayCacheForGemini{}
+	groupRepo := &mockGroupRepoForGemini{
+		groups: map[int64]*Group{
+			groupID: {ID: groupID, Platform: PlatformGemini},
+		},
+	}
+
+	svc := &GeminiMessagesCompatService{
+		accountRepo: repo,
+		groupRepo:   groupRepo,
+		cache:       cache,
+	}
+
+	acc, err := svc.SelectAccountForModelWithExclusions(ctx, &groupID, "", "gemini-2.5-flash", nil)
+	require.NoError(t, err)
+	require.NotNil(t, acc)
+	require.Equal(t, 0, groupRepo.getByIDCalls)
+	require.Equal(t, 1, groupRepo.getByIDLiteCalls)
+}
+
 // TestGeminiMessagesCompatService_SelectAccountForModelWithExclusions_AntigravityGroup 测试 antigravity 分组
 func TestGeminiMessagesCompatService_SelectAccountForModelWithExclusions_AntigravityGroup(t *testing.T) {
 	ctx := context.Background()

backend/internal/service/group.go

@@ -10,6 +10,7 @@ type Group struct {
 	RateMultiplier float64
 	IsExclusive    bool
 	Status         string
+	Hydrated       bool // indicates the group was loaded from a trusted repository source
 
 	SubscriptionType    string
 	DailyLimitUSD       *float64
@@ -72,3 +73,20 @@ func (g *Group) GetImagePrice(imageSize string) *float64 {
 		return g.ImagePrice2K
 	}
 }
+
+// IsGroupContextValid reports whether a group from context has the fields required for routing decisions.
+func IsGroupContextValid(group *Group) bool {
+	if group == nil {
+		return false
+	}
+	if group.ID <= 0 {
+		return false
+	}
+	if !group.Hydrated {
+		return false
+	}
+	if group.Platform == "" || group.Status == "" {
+		return false
+	}
+	return true
+}

backend/internal/service/group_service.go

@@ -16,6 +16,7 @@ var (
 type GroupRepository interface {
 	Create(ctx context.Context, group *Group) error
 	GetByID(ctx context.Context, id int64) (*Group, error)
+	GetByIDLite(ctx context.Context, id int64) (*Group, error)
 	Update(ctx context.Context, group *Group) error
 	Delete(ctx context.Context, id int64) error
 	DeleteCascade(ctx context.Context, id int64) ([]int64, error)

backend/internal/service/openai_gateway_service.go

@@ -545,6 +545,8 @@ func (s *OpenAIGatewayService) Forward(ctx context.Context, c *gin.Context, acco
 	// 2. Normalize input format for Codex API compatibility
 	if account.Type == AccountTypeOAuth {
 		reqBody["store"] = false
+		// Codex 上游不接受 max_output_tokens 参数，需要在转发前移除。
+		delete(reqBody, "max_output_tokens")
 		bodyModified = true
 
 		// Normalize input format: convert AI SDK multi-part content format to simplified format

backend/internal/service/promo_code.go

@@ -0,0 +1,73 @@
+package service
+
+import (
+	"time"
+)
+
+// PromoCode 注册优惠码
+type PromoCode struct {
+	ID          int64
+	Code        string
+	BonusAmount float64
+	MaxUses     int
+	UsedCount   int
+	Status      string
+	ExpiresAt   *time.Time
+	Notes       string
+	CreatedAt   time.Time
+	UpdatedAt   time.Time
+
+	// 关联
+	UsageRecords []PromoCodeUsage
+}
+
+// PromoCodeUsage 优惠码使用记录
+type PromoCodeUsage struct {
+	ID          int64
+	PromoCodeID int64
+	UserID      int64
+	BonusAmount float64
+	UsedAt      time.Time
+
+	// 关联
+	PromoCode *PromoCode
+	User      *User
+}
+
+// CanUse 检查优惠码是否可用
+func (p *PromoCode) CanUse() bool {
+	if p.Status != PromoCodeStatusActive {
+		return false
+	}
+	if p.ExpiresAt != nil && time.Now().After(*p.ExpiresAt) {
+		return false
+	}
+	if p.MaxUses > 0 && p.UsedCount >= p.MaxUses {
+		return false
+	}
+	return true
+}
+
+// IsExpired 检查是否已过期
+func (p *PromoCode) IsExpired() bool {
+	return p.ExpiresAt != nil && time.Now().After(*p.ExpiresAt)
+}
+
+// CreatePromoCodeInput 创建优惠码输入
+type CreatePromoCodeInput struct {
+	Code        string
+	BonusAmount float64
+	MaxUses     int
+	ExpiresAt   *time.Time
+	Notes       string
+}
+
+// UpdatePromoCodeInput 更新优惠码输入
+type UpdatePromoCodeInput struct {
+	Code        *string
+	BonusAmount *float64
+	MaxUses     *int
+	Status      *string
+	ExpiresAt   *time.Time
+	Notes       *string
+}

backend/internal/service/promo_code_repository.go

@@ -0,0 +1,30 @@
+package service
+
+import (
+	"context"
+
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
+)
+
+// PromoCodeRepository 优惠码仓储接口
+type PromoCodeRepository interface {
+	// 基础 CRUD
+	Create(ctx context.Context, code *PromoCode) error
+	GetByID(ctx context.Context, id int64) (*PromoCode, error)
+	GetByCode(ctx context.Context, code string) (*PromoCode, error)
+	GetByCodeForUpdate(ctx context.Context, code string) (*PromoCode, error) // 带行锁的查询，用于并发控制
+	Update(ctx context.Context, code *PromoCode) error
+	Delete(ctx context.Context, id int64) error
+
+	// 列表查询
+	List(ctx context.Context, params pagination.PaginationParams) ([]PromoCode, *pagination.PaginationResult, error)
+	ListWithFilters(ctx context.Context, params pagination.PaginationParams, status, search string) ([]PromoCode, *pagination.PaginationResult, error)
+
+	// 使用记录
+	CreateUsage(ctx context.Context, usage *PromoCodeUsage) error
+	GetUsageByPromoCodeAndUser(ctx context.Context, promoCodeID, userID int64) (*PromoCodeUsage, error)
+	ListUsagesByPromoCode(ctx context.Context, promoCodeID int64, params pagination.PaginationParams) ([]PromoCodeUsage, *pagination.PaginationResult, error)
+
+	// 计数操作
+	IncrementUsedCount(ctx context.Context, id int64) error
+}

backend/internal/service/promo_service.go

@@ -0,0 +1,256 @@
+package service
+
+import (
+	"context"
+	"crypto/rand"
+	"encoding/hex"
+	"fmt"
+	"strings"
+	"time"
+
+	dbent "github.com/Wei-Shaw/sub2api/ent"
+	infraerrors "github.com/Wei-Shaw/sub2api/internal/pkg/errors"
+	"github.com/Wei-Shaw/sub2api/internal/pkg/pagination"
+)
+
+var (
+	ErrPromoCodeNotFound    = infraerrors.NotFound("PROMO_CODE_NOT_FOUND", "promo code not found")
+	ErrPromoCodeExpired     = infraerrors.BadRequest("PROMO_CODE_EXPIRED", "promo code has expired")
+	ErrPromoCodeDisabled    = infraerrors.BadRequest("PROMO_CODE_DISABLED", "promo code is disabled")
+	ErrPromoCodeMaxUsed     = infraerrors.BadRequest("PROMO_CODE_MAX_USED", "promo code has reached maximum uses")
+	ErrPromoCodeAlreadyUsed = infraerrors.Conflict("PROMO_CODE_ALREADY_USED", "you have already used this promo code")
+	ErrPromoCodeInvalid     = infraerrors.BadRequest("PROMO_CODE_INVALID", "invalid promo code")
+)
+
+// PromoService 优惠码服务
+type PromoService struct {
+	promoRepo           PromoCodeRepository
+	userRepo            UserRepository
+	billingCacheService *BillingCacheService
+	entClient           *dbent.Client
+}
+
+// NewPromoService 创建优惠码服务实例
+func NewPromoService(
+	promoRepo PromoCodeRepository,
+	userRepo UserRepository,
+	billingCacheService *BillingCacheService,
+	entClient *dbent.Client,
+) *PromoService {
+	return &PromoService{
+		promoRepo:           promoRepo,
+		userRepo:            userRepo,
+		billingCacheService: billingCacheService,
+		entClient:           entClient,
+	}
+}
+
+// ValidatePromoCode 验证优惠码（注册前调用）
+// 返回 nil, nil 表示空码（不报错）
+func (s *PromoService) ValidatePromoCode(ctx context.Context, code string) (*PromoCode, error) {
+	code = strings.TrimSpace(code)
+	if code == "" {
+		return nil, nil // 空码不报错，直接返回
+	}
+
+	promoCode, err := s.promoRepo.GetByCode(ctx, code)
+	if err != nil {
+		// 保留原始错误类型，不要统一映射为 NotFound
+		return nil, err
+	}
+
+	if err := s.validatePromoCodeStatus(promoCode); err != nil {
+		return nil, err
+	}
+
+	return promoCode, nil
+}
+
+// validatePromoCodeStatus 验证优惠码状态
+func (s *PromoService) validatePromoCodeStatus(promoCode *PromoCode) error {
+	if !promoCode.CanUse() {
+		if promoCode.IsExpired() {
+			return ErrPromoCodeExpired
+		}
+		if promoCode.Status == PromoCodeStatusDisabled {
+			return ErrPromoCodeDisabled
+		}
+		if promoCode.MaxUses > 0 && promoCode.UsedCount >= promoCode.MaxUses {
+			return ErrPromoCodeMaxUsed
+		}
+		return ErrPromoCodeInvalid
+	}
+	return nil
+}
+
+// ApplyPromoCode 应用优惠码（注册成功后调用）
+// 使用事务和行锁确保并发安全
+func (s *PromoService) ApplyPromoCode(ctx context.Context, userID int64, code string) error {
+	code = strings.TrimSpace(code)
+	if code == "" {
+		return nil
+	}
+
+	// 开启事务
+	tx, err := s.entClient.Tx(ctx)
+	if err != nil {
+		return fmt.Errorf("begin transaction: %w", err)
+	}
+	defer func() { _ = tx.Rollback() }()
+
+	txCtx := dbent.NewTxContext(ctx, tx)
+
+	// 在事务中获取并锁定优惠码记录（FOR UPDATE）
+	promoCode, err := s.promoRepo.GetByCodeForUpdate(txCtx, code)
+	if err != nil {
+		return err
+	}
+
+	// 在事务中验证优惠码状态
+	if err := s.validatePromoCodeStatus(promoCode); err != nil {
+		return err
+	}
+
+	// 在事务中检查用户是否已使用过此优惠码
+	existing, err := s.promoRepo.GetUsageByPromoCodeAndUser(txCtx, promoCode.ID, userID)
+	if err != nil {
+		return fmt.Errorf("check existing usage: %w", err)
+	}
+	if existing != nil {
+		return ErrPromoCodeAlreadyUsed
+	}
+
+	// 增加用户余额
+	if err := s.userRepo.UpdateBalance(txCtx, userID, promoCode.BonusAmount); err != nil {
+		return fmt.Errorf("update user balance: %w", err)
+	}
+
+	// 创建使用记录
+	usage := &PromoCodeUsage{
+		PromoCodeID: promoCode.ID,
+		UserID:      userID,
+		BonusAmount: promoCode.BonusAmount,
+		UsedAt:      time.Now(),
+	}
+	if err := s.promoRepo.CreateUsage(txCtx, usage); err != nil {
+		return fmt.Errorf("create usage record: %w", err)
+	}
+
+	// 增加使用次数
+	if err := s.promoRepo.IncrementUsedCount(txCtx, promoCode.ID); err != nil {
+		return fmt.Errorf("increment used count: %w", err)
+	}
+
+	if err := tx.Commit(); err != nil {
+		return fmt.Errorf("commit transaction: %w", err)
+	}
+
+	// 失效余额缓存
+	if s.billingCacheService != nil {
+		go func() {
+			cacheCtx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
+			defer cancel()
+			_ = s.billingCacheService.InvalidateUserBalance(cacheCtx, userID)
+		}()
+	}
+
+	return nil
+}
+
+// GenerateRandomCode 生成随机优惠码
+func (s *PromoService) GenerateRandomCode() (string, error) {
+	bytes := make([]byte, 8)
+	if _, err := rand.Read(bytes); err != nil {
+		return "", fmt.Errorf("generate random bytes: %w", err)
+	}
+	return strings.ToUpper(hex.EncodeToString(bytes)), nil
+}
+
+// Create 创建优惠码
+func (s *PromoService) Create(ctx context.Context, input *CreatePromoCodeInput) (*PromoCode, error) {
+	code := strings.TrimSpace(input.Code)
+	if code == "" {
+		// 自动生成
+		var err error
+		code, err = s.GenerateRandomCode()
+		if err != nil {
+			return nil, err
+		}
+	}
+
+	promoCode := &PromoCode{
+		Code:        strings.ToUpper(code),
+		BonusAmount: input.BonusAmount,
+		MaxUses:     input.MaxUses,
+		UsedCount:   0,
+		Status:      PromoCodeStatusActive,
+		ExpiresAt:   input.ExpiresAt,
+		Notes:       input.Notes,
+	}
+
+	if err := s.promoRepo.Create(ctx, promoCode); err != nil {
+		return nil, fmt.Errorf("create promo code: %w", err)
+	}
+
+	return promoCode, nil
+}
+
+// GetByID 根据ID获取优惠码
+func (s *PromoService) GetByID(ctx context.Context, id int64) (*PromoCode, error) {
+	code, err := s.promoRepo.GetByID(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+	return code, nil
+}
+
+// Update 更新优惠码
+func (s *PromoService) Update(ctx context.Context, id int64, input *UpdatePromoCodeInput) (*PromoCode, error) {
+	promoCode, err := s.promoRepo.GetByID(ctx, id)
+	if err != nil {
+		return nil, err
+	}
+
+	if input.Code != nil {
+		promoCode.Code = strings.ToUpper(strings.TrimSpace(*input.Code))
+	}
+	if input.BonusAmount != nil {
+		promoCode.BonusAmount = *input.BonusAmount
+	}
+	if input.MaxUses != nil {
+		promoCode.MaxUses = *input.MaxUses
+	}
+	if input.Status != nil {
+		promoCode.Status = *input.Status
+	}
+	if input.ExpiresAt != nil {
+		promoCode.ExpiresAt = input.ExpiresAt
+	}
+	if input.Notes != nil {
+		promoCode.Notes = *input.Notes
+	}
+
+	if err := s.promoRepo.Update(ctx, promoCode); err != nil {
+		return nil, fmt.Errorf("update promo code: %w", err)
+	}
+
+	return promoCode, nil
+}
+
+// Delete 删除优惠码
+func (s *PromoService) Delete(ctx context.Context, id int64) error {
+	if err := s.promoRepo.Delete(ctx, id); err != nil {
+		return fmt.Errorf("delete promo code: %w", err)
+	}
+	return nil
+}
+
+// List 获取优惠码列表
+func (s *PromoService) List(ctx context.Context, params pagination.PaginationParams, status, search string) ([]PromoCode, *pagination.PaginationResult, error) {
+	return s.promoRepo.ListWithFilters(ctx, params, status, search)
+}
+
+// ListUsages 获取使用记录
+func (s *PromoService) ListUsages(ctx context.Context, promoCodeID int64, params pagination.PaginationParams) ([]PromoCodeUsage, *pagination.PaginationResult, error) {
+	return s.promoRepo.ListUsagesByPromoCode(ctx, promoCodeID, params)
+}

backend/internal/service/setting_service.go

@@ -32,6 +32,8 @@ type SettingRepository interface {
 type SettingService struct {
 	settingRepo SettingRepository
 	cfg         *config.Config
+	onUpdate    func() // Callback when settings are updated (for cache invalidation)
+	version     string // Application version
 }
 
 // NewSettingService 创建系统设置服务实例
@@ -65,6 +67,8 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		SettingKeyAPIBaseURL,
 		SettingKeyContactInfo,
 		SettingKeyDocURL,
+		SettingKeyHomeContent,
+		SettingKeyLinuxDoConnectEnabled,
 	}
 
 	settings, err := s.settingRepo.GetMultiple(ctx, keys)
@@ -72,6 +76,13 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		return nil, fmt.Errorf("get public settings: %w", err)
 	}
 
+	linuxDoEnabled := false
+	if raw, ok := settings[SettingKeyLinuxDoConnectEnabled]; ok {
+		linuxDoEnabled = raw == "true"
+	} else {
+		linuxDoEnabled = s.cfg != nil && s.cfg.LinuxDo.Enabled
+	}
+
 	return &PublicSettings{
 		RegistrationEnabled: settings[SettingKeyRegistrationEnabled] == "true",
 		EmailVerifyEnabled:  settings[SettingKeyEmailVerifyEnabled] == "true",
@@ -83,6 +94,59 @@ func (s *SettingService) GetPublicSettings(ctx context.Context) (*PublicSettings
 		APIBaseURL:          settings[SettingKeyAPIBaseURL],
 		ContactInfo:         settings[SettingKeyContactInfo],
 		DocURL:              settings[SettingKeyDocURL],
+		HomeContent:         settings[SettingKeyHomeContent],
+		LinuxDoOAuthEnabled: linuxDoEnabled,
+	}, nil
+}
+
+// SetOnUpdateCallback sets a callback function to be called when settings are updated
+// This is used for cache invalidation (e.g., HTML cache in frontend server)
+func (s *SettingService) SetOnUpdateCallback(callback func()) {
+	s.onUpdate = callback
+}
+
+// SetVersion sets the application version for injection into public settings
+func (s *SettingService) SetVersion(version string) {
+	s.version = version
+}
+
+// GetPublicSettingsForInjection returns public settings in a format suitable for HTML injection
+// This implements the web.PublicSettingsProvider interface
+func (s *SettingService) GetPublicSettingsForInjection(ctx context.Context) (any, error) {
+	settings, err := s.GetPublicSettings(ctx)
+	if err != nil {
+		return nil, err
+	}
+
+	// Return a struct that matches the frontend's expected format
+	return &struct {
+		RegistrationEnabled bool   `json:"registration_enabled"`
+		EmailVerifyEnabled  bool   `json:"email_verify_enabled"`
+		TurnstileEnabled    bool   `json:"turnstile_enabled"`
+		TurnstileSiteKey    string `json:"turnstile_site_key,omitempty"`
+		SiteName            string `json:"site_name"`
+		SiteLogo            string `json:"site_logo,omitempty"`
+		SiteSubtitle        string `json:"site_subtitle,omitempty"`
+		APIBaseURL          string `json:"api_base_url,omitempty"`
+		ContactInfo         string `json:"contact_info,omitempty"`
+		DocURL              string `json:"doc_url,omitempty"`
+		HomeContent         string `json:"home_content,omitempty"`
+		LinuxDoOAuthEnabled bool   `json:"linuxdo_oauth_enabled"`
+		Version             string `json:"version,omitempty"`
+	}{
+		RegistrationEnabled: settings.RegistrationEnabled,
+		EmailVerifyEnabled:  settings.EmailVerifyEnabled,
+		TurnstileEnabled:    settings.TurnstileEnabled,
+		TurnstileSiteKey:    settings.TurnstileSiteKey,
+		SiteName:            settings.SiteName,
+		SiteLogo:            settings.SiteLogo,
+		SiteSubtitle:        settings.SiteSubtitle,
+		APIBaseURL:          settings.APIBaseURL,
+		ContactInfo:         settings.ContactInfo,
+		DocURL:              settings.DocURL,
+		HomeContent:         settings.HomeContent,
+		LinuxDoOAuthEnabled: settings.LinuxDoOAuthEnabled,
+		Version:             s.version,
 	}, nil
 }
 
@@ -112,6 +176,14 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 		updates[SettingKeyTurnstileSecretKey] = settings.TurnstileSecretKey
 	}
 
+	// LinuxDo Connect OAuth 登录（终端用户 SSO）
+	updates[SettingKeyLinuxDoConnectEnabled] = strconv.FormatBool(settings.LinuxDoConnectEnabled)
+	updates[SettingKeyLinuxDoConnectClientID] = settings.LinuxDoConnectClientID
+	updates[SettingKeyLinuxDoConnectRedirectURL] = settings.LinuxDoConnectRedirectURL
+	if settings.LinuxDoConnectClientSecret != "" {
+		updates[SettingKeyLinuxDoConnectClientSecret] = settings.LinuxDoConnectClientSecret
+	}
+
 	// OEM设置
 	updates[SettingKeySiteName] = settings.SiteName
 	updates[SettingKeySiteLogo] = settings.SiteLogo
@@ -119,6 +191,7 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 	updates[SettingKeyAPIBaseURL] = settings.APIBaseURL
 	updates[SettingKeyContactInfo] = settings.ContactInfo
 	updates[SettingKeyDocURL] = settings.DocURL
+	updates[SettingKeyHomeContent] = settings.HomeContent
 
 	// 默认配置
 	updates[SettingKeyDefaultConcurrency] = strconv.Itoa(settings.DefaultConcurrency)
@@ -143,7 +216,11 @@ func (s *SettingService) UpdateSettings(ctx context.Context, settings *SystemSet
 		updates[SettingKeyOpsMetricsIntervalSeconds] = strconv.Itoa(settings.OpsMetricsIntervalSeconds)
 	}
 
-	return s.settingRepo.SetMultiple(ctx, updates)
+	err := s.settingRepo.SetMultiple(ctx, updates)
+	if err == nil && s.onUpdate != nil {
+		s.onUpdate() // Invalidate cache after settings update
+	}
+	return err
 }
 
 // IsRegistrationEnabled 检查是否开放注册
@@ -260,6 +337,7 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 		APIBaseURL:                   settings[SettingKeyAPIBaseURL],
 		ContactInfo:                  settings[SettingKeyContactInfo],
 		DocURL:                       settings[SettingKeyDocURL],
+		HomeContent:                  settings[SettingKeyHomeContent],
 	}
 
 	// 解析整数类型
@@ -286,6 +364,38 @@ func (s *SettingService) parseSettings(settings map[string]string) *SystemSettin
 	result.SMTPPassword = settings[SettingKeySMTPPassword]
 	result.TurnstileSecretKey = settings[SettingKeyTurnstileSecretKey]
 
+	// LinuxDo Connect 设置：
+	// - 兼容 config.yaml/env（避免老部署因为未迁移到数据库设置而被意外关闭）
+	// - 支持在后台“系统设置”中覆盖并持久化（存储于 DB）
+	linuxDoBase := config.LinuxDoConnectConfig{}
+	if s.cfg != nil {
+		linuxDoBase = s.cfg.LinuxDo
+	}
+
+	if raw, ok := settings[SettingKeyLinuxDoConnectEnabled]; ok {
+		result.LinuxDoConnectEnabled = raw == "true"
+	} else {
+		result.LinuxDoConnectEnabled = linuxDoBase.Enabled
+	}
+
+	if v, ok := settings[SettingKeyLinuxDoConnectClientID]; ok && strings.TrimSpace(v) != "" {
+		result.LinuxDoConnectClientID = strings.TrimSpace(v)
+	} else {
+		result.LinuxDoConnectClientID = linuxDoBase.ClientID
+	}
+
+	if v, ok := settings[SettingKeyLinuxDoConnectRedirectURL]; ok && strings.TrimSpace(v) != "" {
+		result.LinuxDoConnectRedirectURL = strings.TrimSpace(v)
+	} else {
+		result.LinuxDoConnectRedirectURL = linuxDoBase.RedirectURL
+	}
+
+	result.LinuxDoConnectClientSecret = strings.TrimSpace(settings[SettingKeyLinuxDoConnectClientSecret])
+	if result.LinuxDoConnectClientSecret == "" {
+		result.LinuxDoConnectClientSecret = strings.TrimSpace(linuxDoBase.ClientSecret)
+	}
+	result.LinuxDoConnectClientSecretConfigured = result.LinuxDoConnectClientSecret != ""
+
 	// Model fallback settings
 	result.EnableModelFallback = settings[SettingKeyEnableModelFallback] == "true"
 	result.FallbackModelAnthropic = s.getStringOrDefault(settings, SettingKeyFallbackModelAnthropic, "claude-3-5-sonnet-20241022")

backend/internal/service/settings_view.go

@@ -31,6 +31,7 @@ type SystemSettings struct {
 	APIBaseURL   string
 	ContactInfo  string
 	DocURL       string
+	HomeContent  string
 
 	DefaultConcurrency int
 	DefaultBalance     float64
@@ -64,6 +65,7 @@ type PublicSettings struct {
 	APIBaseURL          string
 	ContactInfo         string
 	DocURL              string
+	HomeContent         string
 	LinuxDoOAuthEnabled bool
 	Version             string
 }

backend/internal/service/wire.go

@@ -140,6 +140,7 @@ var ProviderSet = wire.NewSet(
 	NewAccountService,
 	NewProxyService,
 	NewRedeemService,
+	NewPromoService,
 	NewUsageService,
 	NewDashboardService,
 	ProvidePricingService,

backend/internal/web/embed_off.go

@@ -4,11 +4,38 @@
 package web
 
 import (
+	"context"
+	"errors"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 )
 
+// PublicSettingsProvider is an interface to fetch public settings
+// This stub is needed for compilation when frontend is not embedded
+type PublicSettingsProvider interface {
+	GetPublicSettingsForInjection(ctx context.Context) (any, error)
+}
+
+// FrontendServer is a stub for non-embed builds
+type FrontendServer struct{}
+
+// NewFrontendServer returns an error when frontend is not embedded
+func NewFrontendServer(settingsProvider PublicSettingsProvider) (*FrontendServer, error) {
+	return nil, errors.New("frontend not embedded")
+}
+
+// InvalidateCache is a no-op for non-embed builds
+func (s *FrontendServer) InvalidateCache() {}
+
+// Middleware returns a handler that returns 404 for non-embed builds
+func (s *FrontendServer) Middleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		c.String(http.StatusNotFound, "Frontend not embedded. Build with -tags embed to include frontend.")
+		c.Abort()
+	}
+}
+
 func ServeEmbeddedFrontend() gin.HandlerFunc {
 	return func(c *gin.Context) {
 		c.String(http.StatusNotFound, "Frontend not embedded. Build with -tags embed to include frontend.")

backend/internal/web/embed_on.go

@@ -3,11 +3,15 @@
 package web
 
 import (
+	"bytes"
+	"context"
 	"embed"
+	"encoding/json"
 	"io"
 	"io/fs"
 	"net/http"
 	"strings"
+	"time"
 
 	"github.com/gin-gonic/gin"
 )
@@ -15,6 +19,162 @@ import (
 //go:embed all:dist
 var frontendFS embed.FS
 
+// PublicSettingsProvider is an interface to fetch public settings
+type PublicSettingsProvider interface {
+	GetPublicSettingsForInjection(ctx context.Context) (any, error)
+}
+
+// FrontendServer serves the embedded frontend with settings injection
+type FrontendServer struct {
+	distFS     fs.FS
+	fileServer http.Handler
+	baseHTML   []byte
+	cache      *HTMLCache
+	settings   PublicSettingsProvider
+}
+
+// NewFrontendServer creates a new frontend server with settings injection
+func NewFrontendServer(settingsProvider PublicSettingsProvider) (*FrontendServer, error) {
+	distFS, err := fs.Sub(frontendFS, "dist")
+	if err != nil {
+		return nil, err
+	}
+
+	// Read base HTML once
+	file, err := distFS.Open("index.html")
+	if err != nil {
+		return nil, err
+	}
+	defer func() { _ = file.Close() }()
+
+	baseHTML, err := io.ReadAll(file)
+	if err != nil {
+		return nil, err
+	}
+
+	cache := NewHTMLCache()
+	cache.SetBaseHTML(baseHTML)
+
+	return &FrontendServer{
+		distFS:     distFS,
+		fileServer: http.FileServer(http.FS(distFS)),
+		baseHTML:   baseHTML,
+		cache:      cache,
+		settings:   settingsProvider,
+	}, nil
+}
+
+// InvalidateCache invalidates the HTML cache (call when settings change)
+func (s *FrontendServer) InvalidateCache() {
+	if s != nil && s.cache != nil {
+		s.cache.Invalidate()
+	}
+}
+
+// Middleware returns the Gin middleware handler
+func (s *FrontendServer) Middleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		path := c.Request.URL.Path
+
+		// Skip API routes
+		if strings.HasPrefix(path, "/api/") ||
+			strings.HasPrefix(path, "/v1/") ||
+			strings.HasPrefix(path, "/v1beta/") ||
+			strings.HasPrefix(path, "/antigravity/") ||
+			strings.HasPrefix(path, "/setup/") ||
+			path == "/health" ||
+			path == "/responses" {
+			c.Next()
+			return
+		}
+
+		cleanPath := strings.TrimPrefix(path, "/")
+		if cleanPath == "" {
+			cleanPath = "index.html"
+		}
+
+		// For index.html or SPA routes, serve with injected settings
+		if cleanPath == "index.html" || !s.fileExists(cleanPath) {
+			s.serveIndexHTML(c)
+			return
+		}
+
+		// Serve static files normally
+		s.fileServer.ServeHTTP(c.Writer, c.Request)
+		c.Abort()
+	}
+}
+
+func (s *FrontendServer) fileExists(path string) bool {
+	file, err := s.distFS.Open(path)
+	if err != nil {
+		return false
+	}
+	_ = file.Close()
+	return true
+}
+
+func (s *FrontendServer) serveIndexHTML(c *gin.Context) {
+	// Check cache first
+	cached := s.cache.Get()
+	if cached != nil {
+		// Check If-None-Match for 304 response
+		if match := c.GetHeader("If-None-Match"); match == cached.ETag {
+			c.Status(http.StatusNotModified)
+			c.Abort()
+			return
+		}
+
+		c.Header("ETag", cached.ETag)
+		c.Header("Cache-Control", "no-cache") // Must revalidate
+		c.Data(http.StatusOK, "text/html; charset=utf-8", cached.Content)
+		c.Abort()
+		return
+	}
+
+	// Cache miss - fetch settings and render
+	ctx, cancel := context.WithTimeout(c.Request.Context(), 2*time.Second)
+	defer cancel()
+
+	settings, err := s.settings.GetPublicSettingsForInjection(ctx)
+	if err != nil {
+		// Fallback: serve without injection
+		c.Data(http.StatusOK, "text/html; charset=utf-8", s.baseHTML)
+		c.Abort()
+		return
+	}
+
+	settingsJSON, err := json.Marshal(settings)
+	if err != nil {
+		// Fallback: serve without injection
+		c.Data(http.StatusOK, "text/html; charset=utf-8", s.baseHTML)
+		c.Abort()
+		return
+	}
+
+	rendered := s.injectSettings(settingsJSON)
+	s.cache.Set(rendered, settingsJSON)
+
+	cached = s.cache.Get()
+	if cached != nil {
+		c.Header("ETag", cached.ETag)
+	}
+	c.Header("Cache-Control", "no-cache")
+	c.Data(http.StatusOK, "text/html; charset=utf-8", rendered)
+	c.Abort()
+}
+
+func (s *FrontendServer) injectSettings(settingsJSON []byte) []byte {
+	// Create the script tag to inject
+	script := []byte(`<script>window.__APP_CONFIG__=` + string(settingsJSON) + `;</script>`)
+
+	// Inject before </head>
+	headClose := []byte("</head>")
+	return bytes.Replace(s.baseHTML, headClose, append(script, headClose...), 1)
+}
+
+// ServeEmbeddedFrontend returns a middleware for serving embedded frontend
+// This is the legacy function for backward compatibility when no settings provider is available
 func ServeEmbeddedFrontend() gin.HandlerFunc {
 	distFS, err := fs.Sub(frontendFS, "dist")
 	if err != nil {

backend/internal/web/html_cache.go

@@ -0,0 +1,77 @@
+//go:build embed
+
+package web
+
+import (
+	"crypto/sha256"
+	"encoding/hex"
+	"sync"
+)
+
+// HTMLCache manages the cached index.html with injected settings
+type HTMLCache struct {
+	mu              sync.RWMutex
+	cachedHTML      []byte
+	etag            string
+	baseHTMLHash    string // Hash of the original index.html (immutable after build)
+	settingsVersion uint64 // Incremented when settings change
+}
+
+// CachedHTML represents the cache state
+type CachedHTML struct {
+	Content []byte
+	ETag    string
+}
+
+// NewHTMLCache creates a new HTML cache instance
+func NewHTMLCache() *HTMLCache {
+	return &HTMLCache{}
+}
+
+// SetBaseHTML initializes the cache with the base HTML template
+func (c *HTMLCache) SetBaseHTML(baseHTML []byte) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	hash := sha256.Sum256(baseHTML)
+	c.baseHTMLHash = hex.EncodeToString(hash[:8]) // First 8 bytes for brevity
+}
+
+// Invalidate marks the cache as stale
+func (c *HTMLCache) Invalidate() {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	c.settingsVersion++
+	c.cachedHTML = nil
+	c.etag = ""
+}
+
+// Get returns the cached HTML or nil if cache is stale
+func (c *HTMLCache) Get() *CachedHTML {
+	c.mu.RLock()
+	defer c.mu.RUnlock()
+
+	if c.cachedHTML == nil {
+		return nil
+	}
+	return &CachedHTML{
+		Content: c.cachedHTML,
+		ETag:    c.etag,
+	}
+}
+
+// Set updates the cache with new rendered HTML
+func (c *HTMLCache) Set(html []byte, settingsJSON []byte) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+
+	c.cachedHTML = html
+	c.etag = c.generateETag(settingsJSON)
+}
+
+// generateETag creates an ETag from base HTML hash + settings hash
+func (c *HTMLCache) generateETag(settingsJSON []byte) string {
+	settingsHash := sha256.Sum256(settingsJSON)
+	return `"` + c.baseHTMLHash + "-" + hex.EncodeToString(settingsHash[:8]) + `"`
+}

backend/migrations/033_add_promo_codes.sql

@@ -0,0 +1,34 @@
+-- 创建注册优惠码表
+CREATE TABLE IF NOT EXISTS promo_codes (
+    id BIGSERIAL PRIMARY KEY,
+    code VARCHAR(32) NOT NULL UNIQUE,
+    bonus_amount DECIMAL(20,8) NOT NULL DEFAULT 0,
+    max_uses INT NOT NULL DEFAULT 0,
+    used_count INT NOT NULL DEFAULT 0,
+    status VARCHAR(20) NOT NULL DEFAULT 'active',
+    expires_at TIMESTAMPTZ DEFAULT NULL,
+    notes TEXT DEFAULT NULL,
+    created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    updated_at TIMESTAMPTZ NOT NULL DEFAULT NOW()
+);
+
+-- 创建优惠码使用记录表
+CREATE TABLE IF NOT EXISTS promo_code_usages (
+    id BIGSERIAL PRIMARY KEY,
+    promo_code_id BIGINT NOT NULL REFERENCES promo_codes(id) ON DELETE CASCADE,
+    user_id BIGINT NOT NULL REFERENCES users(id) ON DELETE CASCADE,
+    bonus_amount DECIMAL(20,8) NOT NULL,
+    used_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
+    UNIQUE(promo_code_id, user_id)
+);
+
+-- 索引
+CREATE INDEX IF NOT EXISTS idx_promo_codes_status ON promo_codes(status);
+CREATE INDEX IF NOT EXISTS idx_promo_codes_expires_at ON promo_codes(expires_at);
+CREATE INDEX IF NOT EXISTS idx_promo_code_usages_promo_code_id ON promo_code_usages(promo_code_id);
+CREATE INDEX IF NOT EXISTS idx_promo_code_usages_user_id ON promo_code_usages(user_id);
+
+COMMENT ON TABLE promo_codes IS '注册优惠码';
+COMMENT ON TABLE promo_code_usages IS '优惠码使用记录';
+COMMENT ON COLUMN promo_codes.max_uses IS '最大使用次数，0表示无限制';
+COMMENT ON COLUMN promo_codes.status IS '状态: active, disabled';

frontend/src/api/admin/index.ts

@@ -9,6 +9,7 @@ import groupsAPI from './groups'
 import accountsAPI from './accounts'
 import proxiesAPI from './proxies'
 import redeemAPI from './redeem'
+import promoAPI from './promo'
 import settingsAPI from './settings'
 import systemAPI from './system'
 import subscriptionsAPI from './subscriptions'
@@ -28,6 +29,7 @@ export const adminAPI = {
   accounts: accountsAPI,
   proxies: proxiesAPI,
   redeem: redeemAPI,
+  promo: promoAPI,
   settings: settingsAPI,
   system: systemAPI,
   subscriptions: subscriptionsAPI,
@@ -45,6 +47,7 @@ export {
   accountsAPI,
   proxiesAPI,
   redeemAPI,
+  promoAPI,
   settingsAPI,
   systemAPI,
   subscriptionsAPI,