You have a simple pydantic model with datetime attribute, like below:
from datetime import datetime
from pydantic import BaseModel
class Model(BaseModel):
dt: datetime = datetime.now
When you try to serialize this model to json, that try to return it from fastapi end point. You get following error.
INFO: Application startup complete.
INFO: Uvicorn running on http://0.0.0.0:8000 (Press CTRL+C to quit)
INFO: 127.0.0.1:52831 - "POST /yard-manager/check_rule?id_request=1 HTTP/1.1" 500 Internal Server Error
ERROR: Exception in ASGI application
Traceback (most recent call last):
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\anyio\streams\memory.py", line 94, in receive
return self.receive_nowait()
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\anyio\streams\memory.py", line 89, in receive_nowait
raise WouldBlock
anyio.WouldBlock
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\base.py", line 43, in call_next
message = await recv_stream.receive()
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\anyio\streams\memory.py", line 114, in receive
raise EndOfStream
anyio.EndOfStream
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\uvicorn\protocols\http\httptools_impl.py", line 404, in run_asgi
result = await app( # type: ignore[func-returns-value]
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\uvicorn\middleware\proxy_headers.py", line 78, in __call__
return await self.app(scope, receive, send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\applications.py", line 269, in __call__
await super().__call__(scope, receive, send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\applications.py", line 124, in __call__
await self.middleware_stack(scope, receive, send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\errors.py", line 184, in __call__
raise exc
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\errors.py", line 162, in __call__
await self.app(scope, receive, _send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\cors.py", line 92, in __call__
await self.simple_response(scope, receive, send, request_headers=headers)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\cors.py", line 147, in simple_response
await self.app(scope, receive, send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\base.py", line 68, in __call__
response = await self.dispatch_func(request, call_next)
File "c:\Users\ati_o\Projects\sms-digital\SSAB\ssab-ox-mes-pss-alg\rest_service\middleware.py", line 36, in check_header_token
response = await call_next(request)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\base.py", line 46, in call_next
raise app_exc
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\middleware\base.py", line 36, in coro
await self.app(scope, request.receive, send_stream.send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\exceptions.py", line 93, in __call__
raise exc
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\exceptions.py", line 82, in __call__
await self.app(scope, receive, sender)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\middleware\asyncexitstack.py", line 21, in __call__
raise e
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\middleware\asyncexitstack.py", line 18, in __call__
await self.app(scope, receive, send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\routing.py", line 670, in __call__
await route.handle(scope, receive, send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\routing.py", line 266, in handle
await self.app(scope, receive, send)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\starlette\routing.py", line 65, in app
response = await func(request)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\routing.py", line 249, in app
content = await serialize_response(
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\routing.py", line 149, in serialize_response
return jsonable_encoder(response_content)
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\encoders.py", line 157, in jsonable_encoder
return jsonable_encoder(
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\encoders.py", line 113, in jsonable_encoder
encoded_value = jsonable_encoder(
File "WINDOWS_USERNAME\scoop\apps\python310\current\lib\site-packages\fastapi\encoders.py", line 156, in jsonable_encoder
raise ValueError(errors)
ValueError: [TypeError("'builtin_function_or_method' object is not iterable"), TypeError('vars() argument must have __dict__ attribute')]