[Bug] Regarding the problem that the conversation record cannot be exported due to abnormal conversation content

[sometimecry]

Contact Information

sometimecry@outlook.com

MaxKB Version

v1.10.10 lts

Problem Description

对话记录导出的问题，当遇到AI回答是502 gateway nginx，我点击导出对话记录无任何的反应，前端报错500 internal server error，查询系统报错内容是
TypeError: sequence item 0: expected str instance, NoneType found
10.128.20.121 [29/Oct/2025:17:10:09 +0800] 0.000944s "POST /api/application/cf2949f6-8964-11f0-bb6b-0242ac010002/chat/export?start_time=2025-10-22&end_time=2025-10-29&min_star=0&min_trample=0&comparer=and HTTP/1.1" 500 0

Steps to Reproduce

让对话内容出现异常值

The expected correct result

No response

Related log output

Additional Information

No response

[sometimecry]

完整报错内容：Traceback (most recent call last):
File "/opt/py3/lib/python3.11/site-packages/gunicorn/workers/gthread.py", line 281, in handle
keepalive = self.handle_request(req, conn)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/opt/py3/lib/python3.11/site-packages/gunicorn/workers/gthread.py", line 338, in handle_request
for item in respiter:
File "/opt/maxkb/app/apps/application/serializers/chat_serializers.py", line 265, in stream_response
for col_idx, value in enumerate(self.to_row(row), 1):
^^^^^^^^^^^^^^^^
File "/opt/maxkb/app/apps/application/serializers/chat_serializers.py", line 202, in to_row
padding_problem_text = ' '.join(node.get("answer", "") for key, node in details.items() if
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: sequence item 0: expected str instance, NoneType found
10.128.20.121 [29/Oct/2025:17:10:09 +0800] 0.000944s "POST /api/application/cf2949f6-8964-11f0-bb6b-0242ac010002/chat/export?start_time=2025-10-22&end_time=2025-10-29&min_star=0&min_trample=0&comparer=and HTTP/1.1" 500 0

[Shenguobin0102]

感谢反馈，后续版本修复。

[shaohuzhang1]

Bot detected the issue body's language is not English, translate it automatically. 👯👭🏻🧑‍🤝‍🧑👫🧑🏿‍🤝‍🧑🏻👩🏾‍🤝‍👨🏿👬🏿

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Thanks for the feedback, it will be fixed in subsequent versions.