[Bug]: n8n error

[tianlinzx]

Runtime environment

4.5.0

Exception

[2025-11-13 16:16:23 +0800] [10] [INFO] 10.1.9.27:52101 GET /api/v1/pipelines/_/metadata 1.1 200 23413 4169
[2025-11-13 16:16:23 +0800] [10] [INFO] 10.1.9.27:51278 GET /api/v1/pipelines/94bda9a8-5eee-4c6b-a08d-dbe8ce993006 1.1 200 2063 5555
[2025-11-13 16:16:27 +0800] [10] [INFO] 10.1.9.27:51278 GET /api/v1/pipelines/94bda9a8-5eee-4c6b-a08d-dbe8ce993006/chat/messages/person 1.1 200 1527 3628
[2025-11-13 16:16:27 +0800] [10] [INFO] 10.1.9.27:51278 GET /api/v1/pipelines/94bda9a8-5eee-4c6b-a08d-dbe8ce993006/chat/messages/person 1.1 200 1527 1431
[11-13 16:16:31.271] process.py (39) - [INFO] : Processing request from person_webchatperson (16): testsddd
[11-13 16:16:31.616] chat.py (114) - [ERROR] : 对话(16)请求失败: ValueError "Message" object has no field "resp_message_id"
Traceback (most recent call last):
File "/app/pkg/pipeline/process/handlers/chat.py", line 82, in handle
result.resp_message_id = str(resp_message_id)
^^^^^^^^^^^^^^^^^^^^^^
File "/app/.venv/lib/python3.12/site-packages/pydantic/main.py", line 1032, in setattr
elif (setattr_handler := self._setattr_handler(name, value)) is not None:
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/app/.venv/lib/python3.12/site-packages/pydantic/main.py", line 1079, in _setattr_handler
raise ValueError(f'"{cls.name}" object has no field "{name}"')
ValueError: "Message" object has no field "resp_message_id"
[11-13 16:16:31.617] pipelinemgr.py (236) - [ERROR] : Error processing query 16 stage=MessageProcessor : list index out of range
[11-13 16:16:31.618] pipelinemgr.py (237) - [ERROR] : Traceback: Traceback (most recent call last):
File "/app/pkg/pipeline/pipelinemgr.py", line 233, in process_query
await self._execute_from_stage(0, query)
File "/app/pkg/pipeline/pipelinemgr.py", line 193, in _execute_from_stage
await self._check_output(query, sub_result)
File "/app/pkg/pipeline/pipelinemgr.py", line 120, in _check_output
bot_message=query.resp_messages[-1],
~~~~~~~~~~~~~~~~~~~^^^^
IndexError: list index out of range

Reproduction steps

response body is extremely simple.

{
  "resp_message_id":"001",
  "response": "hello calvin"
}

Enabled plugins

none

[dosubot]

This error happens because the Message model doesn't define a resp_message_id field, but the code in chat.py tries to set it during streaming response handling. As a result, the response message isn't appended to the list, which then causes the IndexError in pipelinemgr.py when it tries to access query.resp_messages[-1]—the list is empty due to the earlier failure. The n8n integration only yields Message objects with role and content fields, so your response structure is fine, but the pipeline expects a resp_message_id field that isn't present in the model. This issue is known and will be fixed in a future release; there isn't an immediate workaround available right now reference.

To reply, just mention @dosu.

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