[BUG] RecursionError from response model

Describe the bug

RecursionError from response model

1. Create a file with:

from __future__ import annotations
from fastapi import FastAPI
from pydantic import BaseModel

class Response(BaseModel):
    children: 'Response'

Response.update_forward_refs()

app = FastAPI()
@app.get("/", response_model=Response)
def read_root():
    return {"Hello": "World"}

1. start app and it throws a RecursionError

[chris-allnutt]

This is a pydantic issue, not fastAPI https://github.com/samuelcolvin/pydantic/issues/1370

[tiangolo]

Thanks for the help here everyone! 👏 🙇

Thanks for reporting back and closing the issue 👍