TypeError : Type is not serializable: ObjectId

[Add-Vishnu]

This is the error i'm getting for calling any methods after running the langserve server

Error:
ERROR: Exception in ASGI application
RuntimeError: super(): class cell not found

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\uvicorn\protocols\http\httptools_impl.py", line 426, in run_asgi
result = await app( # type: ignore[func-returns-value]
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\uvicorn\middleware\proxy_headers.py", line 84, in call
return await self.app(scope, receive, send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\fastapi\applications.py", line 292, in call
await super().call(scope, receive, send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\applications.py", line 122, in call
await self.middleware_stack(scope, receive, send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\middleware\errors.py", line 184, in call
raise exc
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\middleware\errors.py", line 162, in call
await self.app(scope, receive, _send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\middleware\exceptions.py", line 79, in call
raise exc
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\middleware\exceptions.py", line 68, in call
await self.app(scope, receive, sender)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\fastapi\middleware\asyncexitstack.py", line 20, in call
raise e
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\fastapi\middleware\asyncexitstack.py", line 17, in call
await self.app(scope, receive, send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\routing.py", line 718, in call
await route.handle(scope, receive, send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\routing.py", line 276, in handle
await self.app(scope, receive, send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\starlette\routing.py", line 69, in app
await response(scope, receive, send)
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\sse_starlette\sse.py", line 255, in call
async with anyio.create_task_group() as task_group:
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\anyio_backends_asyncio.py", line 597, in aexit
raise exceptions[0]
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\sse_starlette\sse.py", line 258, in wrap
await func()
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\sse_starlette\sse.py", line 245, in stream_response
async for data in self.body_iterator:
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\langserve\api_handler.py", line 1085, in _stream_log
"data": self._serializer.dumps(data).decode("utf-8"),
File "C:\Users\VickyWadh\anaconda3\envs\langchain\lib\site-packages\langserve\serialization.py", line 169, in dumps
return orjson.dumps(obj, default=default)
TypeError: Type is not JSON serializable: ObjectId

I've tried other basic templates too, but the error is constant. At present i'm using rag-conversation.

Extra Info : I'm using MongoDB Atlas vector search as a retriever.

[eyurtsev]

LangServe can't serialize arbitrary things into JSON -- either remove the ObjectId from the response or convert into a JSON serializable value and things will work