Fix models to support pydantic orm_mode

[ac3d912]

Null (None) values will cause ValidationErrors when used with postgres.
See: fastapi/fastapi#361 (comment)

I made these changes and it works like a charm. (The issue out-of-the-box being the None value for first superuser's Full Name)

FastAPI version: 0.33.0
Pydantic version: 0.30

Example validation error

INFO: ('192.168.0.2', 53732) - "POST /api/v1/#/test-token HTTP/1.1" 500
ERROR: Exception in ASGI application
Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/uvicorn/protocols/http/httptools_impl.py", line 368, in run_asgi
    result = await app(self.scope, self.receive, self.send)
  File "/usr/local/lib/python3.7/site-packages/starlette/applications.py", line 133, in __call__
    await self.error_middleware(scope, receive, send)
  File "/usr/local/lib/python3.7/site-packages/starlette/middleware/errors.py", line 122, in __call__
    raise exc from None
  File "/usr/local/lib/python3.7/site-packages/starlette/middleware/errors.py", line 100, in __call__
    await self.app(scope, receive, _send)
  File "/usr/local/lib/python3.7/site-packages/starlette/middleware/base.py", line 25, in __call__
    response = await self.dispatch_func(request, self.call_next)
  File "./app/main.py", line 34, in db_session_middleware
    response = await call_next(request)
  File "/usr/local/lib/python3.7/site-packages/starlette/middleware/base.py", line 45, in call_next
    task.result()
  File "/usr/local/lib/python3.7/site-packages/starlette/middleware/base.py", line 38, in coro
    await self.app(scope, receive, send)
  File "/usr/local/lib/python3.7/site-packages/starlette/middleware/cors.py", line 84, in __call__
    await self.simple_response(scope, receive, send, request_headers=headers)
  File "/usr/local/lib/python3.7/site-packages/starlette/middleware/cors.py", line 140, in simple_response
    await self.app(scope, receive, send)
  File "/usr/local/lib/python3.7/site-packages/starlette/exceptions.py", line 73, in __call__
    raise exc from None
  File "/usr/local/lib/python3.7/site-packages/starlette/exceptions.py", line 62, in __call__
    await self.app(scope, receive, sender)
  File "/usr/local/lib/python3.7/site-packages/starlette/routing.py", line 585, in __call__
    await route(scope, receive, send)
  File "/usr/local/lib/python3.7/site-packages/starlette/routing.py", line 207, in __call__
    await self.app(scope, receive, send)
  File "/usr/local/lib/python3.7/site-packages/starlette/routing.py", line 40, in app
    response = await func(request)
  File "/usr/local/lib/python3.7/site-packages/fastapi/routing.py", line 122, in app
    skip_defaults=response_model_skip_defaults,
  File "/usr/local/lib/python3.7/site-packages/fastapi/routing.py", line 54, in serialize_response
    raise ValidationError(errors)
pydantic.error_wrappers.ValidationError: 1 validation error
response
  value is not a valid dict (type=type_error.dict)

[jf---]

I made these changes and it works like a charm

Happy to second that ;)

I think its fairly urgent to merge this PR ( @tiangolo ), since it does break the test suite

---

perhaps running CI nightly is of interest, that'll help catching upstream changes
given the in the Pipfile the exact version of the dependencies isn't specified, this might help to catch such breaking changes.

[bossjones]

I came across the same issue, thank you for posting a PR @ac3d912. Also thank you @tiangolo for this project.

[victorbordo]

Just ran into this issue as well. Appreciate you identifying it and submitting a PR @ac3d912. Saved me a lot of time.

FastAPI is awesome @tiangolo. Thanks for all the work you've put into creating and maintaining it.

[stratosgear]

Here is a 👍 from me too, for this lifesaving tip! This ought to be merged!

[stratosgear]

Also regarding @jf--- comment about upstream changes, I hope my recent #69 will be taken into consideration, as it will potentially eliminate such upstream cases...?

[rlonka]

I have ran into this issue as well.
Thanks @tiangolo for great project!

[StephenBrown2]

@tiangolo Fixed in #23?

[tiangolo]

Thanks @ac3d912 for debugging and implementing it! 🎉 🚀

Thanks everyone for the discussion here (and the patience 😅 ).

@StephenBrown2 , yep, thanks. This was fixed as part of that PR.

I'll close this PR now as the fix is already implemented (from a different PR).