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fix: handle non-string tool results to fix #631 (#633)

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- Backend: Convert non-string content (lists, dicts) to JSON strings in _create_event_stream_message to ensure frontend always receives string content
- Frontend: Add type guard before calling startsWith() on toolCall.result for defensive programming

This fixes the TypeError: toolCall.result.startsWith is not a function when tools return complex objects.
This commit is contained in:
Willem Jiang
2025-10-20 23:10:58 +08:00
committed by GitHub
parent 984aa69acf
commit 3689bc0e69
2 changed files with 6 additions and 2 deletions
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6
src/server/app.py
View File

@@ -157,6 +157,10 @@ def _create_event_stream_message(
message_chunk, message_metadata, thread_id, agent_name message_chunk, message_metadata, thread_id, agent_name
): ):
"""Create base event stream message.""" """Create base event stream message."""
content = message_chunk.content
if not isinstance(content, str):
content = json.dumps(content, ensure_ascii=False)
event_stream_message = { event_stream_message = {
"thread_id": thread_id, "thread_id": thread_id,
"agent": agent_name, "agent": agent_name,
@@ -166,7 +170,7 @@ def _create_event_stream_message(
"langgraph_node": message_metadata.get("langgraph_node", ""), "langgraph_node": message_metadata.get("langgraph_node", ""),
"langgraph_path": message_metadata.get("langgraph_path", ""), "langgraph_path": message_metadata.get("langgraph_path", ""),
"langgraph_step": message_metadata.get("langgraph_step", ""), "langgraph_step": message_metadata.get("langgraph_step", ""),
"content": message_chunk.content, "content": content,
} }
# Add optional fields # Add optional fields

2
web/src/app/chat/components/research-activities-block.tsx
View File

@@ -105,7 +105,7 @@ const ActivityListItem = React.memo(({ messageId }: { messageId: string }) => {
if (message) { if (message) {
if (!message.isStreaming && message.toolCalls?.length) { if (!message.isStreaming && message.toolCalls?.length) {
for (const toolCall of message.toolCalls) { for (const toolCall of message.toolCalls) {
if (toolCall.result?.startsWith("Error")) { if (typeof toolCall.result === "string" && toolCall.result?.startsWith("Error")) {
return null; return null;
} }
if (toolCall.name === "web_search") { if (toolCall.name === "web_search") {