fix: AI dialogue node calls MCP, AI's reply content is included in the code block of MCP call result, markdown parsing error #3846 (#3894)

Author: shaohuzhang1

apps/application/flow/step_node/ai_chat_step_node/impl/base_chat_node.py

@@ -11,7 +11,6 @@
 import re
 import time
 from functools import reduce
-from types import AsyncGeneratorType
 from typing import List, Dict
 
 from django.db.models import QuerySet
@@ -33,13 +32,25 @@
         <strong>Called MCP Tool: <em>%s</em></strong>
     </summary>
 
-```json
 %s
-```
+
 </details>
 
 """
 
+tool_message_json_template = """
+```json
+%s
+```
+"""
+
+
+def generate_tool_message_template(name, context):
+    if '```' in context:
+        return tool_message_template % (name, context)
+    else:
+        return tool_message_template % (name, tool_message_json_template % (context))
+
 
 def _write_context(node_variable: Dict, workflow_variable: Dict, node: INode, workflow, answer: str,
                    reasoning_content: str):
@@ -109,7 +120,7 @@ async def _yield_mcp_response(chat_model, message_list, mcp_servers):
         response = agent.astream({"messages": message_list}, stream_mode='messages')
         async for chunk in response:
             if isinstance(chunk[0], ToolMessage):
-                content = tool_message_template % (chunk[0].name, chunk[0].content)
+                content = generate_tool_message_template(chunk[0].name, chunk[0].content)
                 chunk[0].content = content
                 yield chunk[0]
             if isinstance(chunk[0], AIMessageChunk):

ui/src/workflow/common/NodeContainer.vue

@@ -297,7 +297,6 @@ function clickNodes(item: any) {
     x: anchorData.value?.x + width / 2 + 200,
     y: anchorData.value?.y - item.height
   })
-  console.log(nodeModel)
   props.nodeModel.graphModel.addEdge({
     type: 'app-edge',
     sourceNodeId: props.nodeModel.id,