How to handle models when programmatically creating endpoints in FastAPI

The following examples both work just fine, the only issue is that mypy is complaing about create_operation. Specifically I'm getting these errors:

• Variable "model" is not valid as a type
• model? has no attribute "dict"

Especially the second error doesn't make sense to me since pydantic.BaseModel definitely has a dict method. Is there a better way to annotate this?

from typing import Type  from pydantic import BaseModel  from fastapi import FastAPI, testclient    app = FastAPI()  client = testclient.TestClient(app)      class A(BaseModel):      foo: str      # regular way of creating an endpoint  @app.post("/foo")  def post(data: A):      assert data.dict() == {"foo": "1"}      # creating an endpoint programmatically  def create_operation(model: Type[BaseModel]):       @app.post("/bar")       def post(data: model):           assert data.dict() == {"foo": "1"}      create_operation(A)    assert client.post("/foo", json={"foo": 1}).status_code == 200  assert client.post("/bar", json={"foo": 1}).status_code == 200  

https://stackoverflow.com/questions/66481304/how-to-handle-models-when-programmatically-creating-endpoints-in-fastapi March 05, 2021 at 02:53AM