#233 — Fix JSON serialization when processing LLM engine’s ChatResponseWidget

Repo: Twill-AI/facade State: closed | Status: done Assignee: Unassigned

Created: 2024-12-05 · Updated: 2025-03-24

Description

We are still facing JSON serialization issues in websockets_router.py when we try to process ChatResponseWidget data from LLM engine:

2024-12-05 06:32:44.945|ERROR|LOCALTENAN|websockets_router:500|003e6bbe-53c4-42dc-9a45-71b4a520bbf7: Failed to handle LLM Engine response in LLM Chat 33:
Traceback (most recent call last):
  File "/app/app/api/websockets_router.py", line 467, in _run_llm_engine_with_context
    ) = await self._process_chat_event(
        ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/app/app/api/websockets_router.py", line 714, in _process_chat_event
    values_rows=json.dumps(
                ^^^^^^^^^^^
  File "/usr/local/lib/python3.12/json/__init__.py", line 238, in dumps
    **kw).encode(obj)
          ^^^^^^^^^^^
  File "/usr/local/lib/python3.12/json/encoder.py", line 200, in encode
    chunks = self.iterencode(o, _one_shot=True)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/json/encoder.py", line 258, in iterencode
    return _iterencode(o, 0)
           ^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.12/json/encoder.py", line 180, in default
    raise TypeError(f'Object of type {o.__class__.__name__} '
TypeError: Object of type date is not JSON serializable

AC:

• WebSocketsRouter successfully processes data of type ChatResponseWidget when it contains either date or datetime values.

Notes

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