From 41dff547fee422e1b3150f62d7fef9028ea06f7e Mon Sep 17 00:00:00 2001
From: wanwu <wanwu@wanwudeMacBook-Pro.local>
Date: Sun, 26 Oct 2025 23:16:03 +0800
Subject: [PATCH] =?UTF-8?q?fix:=20Entity=E7=94=9F=E6=88=90=E5=B7=A5?=
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✅ 修复内容（工具层）:

1. 自动生成表名:
   - 添加generateTableName方法
   - 规则: nc_前缀 + 驼峰转下划线
   - 例如: SysUser -> nc_sys_user
   - 对应Java MyBatis-Plus配置的table-prefix: nc_

2. 修复时间字段装饰器:
   - 移除@CreateDateColumn/@UpdateDateColumn
   - Java使用Long类型存储秒级时间戳(int)
   - 统一使用@Column装饰器
   - Java: private Long createTime -> MySQL: create_time int
   - NestJS: @Column() createTime: number

📋 修改文件:
- entity-generator.js
  - generateDecorators(): 自动生成表名
  - generateTableName(): 新增方法
  - generateFieldDecorators(): 移除特殊时间处理

🎯 效果:
- 生成的Entity自动匹配Java数据库表名
- 时间字段类型100%一致
- 无需手动修改生成的Entity文件
---
 .../generators/entity-generator.js            | 36 ++++++++++++-------
 1 file changed, 24 insertions(+), 12 deletions(-)

diff --git a/wwjcloud-nest-v1/tools/java-to-nestjs-migration/generators/entity-generator.js b/wwjcloud-nest-v1/tools/java-to-nestjs-migration/generators/entity-generator.js
index e39d2635..4c4d3875 100644
--- a/wwjcloud-nest-v1/tools/java-to-nestjs-migration/generators/entity-generator.js
+++ b/wwjcloud-nest-v1/tools/java-to-nestjs-migration/generators/entity-generator.js
@@ -76,15 +76,34 @@ ${fields}
     const decorators = [];
     
     // 实体装饰器
+    // 修复：自动生成表名（nc_前缀 + 驼峰转下划线）
     if (javaEntity.tableName) {
       decorators.push(`@Entity('${javaEntity.tableName}')`);
     } else {
-      decorators.push('@Entity()');
+      // 从Java类名生成表名：SysUser -> nc_sys_user
+      const tableName = this.generateTableName(javaEntity.className);
+      decorators.push(`@Entity('${tableName}')`);
     }
     
     return decorators.join('\n');
   }
 
+  /**
+   * 生成表名：Java类名转数据库表名
+   * 规则：nc_前缀 + 驼峰转下划线
+   * 例如：SysUser -> nc_sys_user
+   */
+  generateTableName(className) {
+    // 驼峰转下划线
+    const underscoreName = className
+      .replace(/([A-Z])/g, '_$1')
+      .toLowerCase()
+      .replace(/^_/, ''); // 移除开头的下划线
+    
+    // 添加nc_前缀（MyBatis-Plus配置的表前缀）
+    return `nc_${underscoreName}`;
+  }
+
   /**
    * 生成字段
    */
@@ -134,17 +153,10 @@ ${fields}
       return decorators.join('\n  ');
     }
     
-    // 创建时间装饰器（优先判断）
-    if (field.fieldName === 'createdAt' || field.fieldName === 'createTime' || field.columnName === 'create_time') {
-      const dbColumnName = field.columnName || field.fieldName;
-      return `@CreateDateColumn({ name: '${dbColumnName}' })`;
-    }
-    
-    // 更新时间装饰器（优先判断）
-    if (field.fieldName === 'updatedAt' || field.fieldName === 'updateTime' || field.columnName === 'update_time') {
-      const dbColumnName = field.columnName || field.fieldName;
-      return `@UpdateDateColumn({ name: '${dbColumnName}' })`;
-    }
+    // ✅ 修复：Java使用Long类型存储秒级时间戳（int），不使用Date对象
+    // 所有字段（包括时间字段）都使用普通@Column装饰器
+    // Java: private Long createTime; -> MySQL: create_time int
+    // NestJS: @Column() createTime: number;
     
     // 列装饰器
     const columnOptions = [];