Issue 1:
First Check

I added a very descriptive title to this issue.

I used the GitHub search to find a similar issue and didn't find it.

I searched the FastAPI documentation, with the integrated search.

I already searched in Google "How to X in FastAPI" and didn't find any information.

I already read and followed all the tutorial in the docs and didn't find an answer.

I already checked if it is not related to FastAPI but to Pydantic.

I already checked if it is not related to FastAPI but to Swagger UI.

I already checked if it is not related to FastAPI but to ReDoc.

Commit to Help

I commit to help with one of those options 👆

Example Code

from fastapi import FastAPI
from pydantic import BaseModel, confloat

app = FastAPI()

LngLat = Tuple[confloat(ge=-180.0, le=180.0), confloat(ge=-90, le=90)]

class Viewport(BaseModel):
sw: LngLat
ne: LngLat

@app.get('/viewport', response_model=Viewport)
def get_viewport():
return Viewport(sw=[-93, 36], ne=[-92, 37])

Description

The example code I've provided causes the openapi docs page to crash, with the following error displayed:

Failed to load API definition.

Errors

Fetch error

Internal Server Error /openapi.json

Due to the following stack trace:

File "/Users/hansbrende/miniconda3/envs/facade-api/lib/python3.8/site-packages/fastapi/applications.py", line 161, in openapi
return JSONResponse(self.openapi())
File "/Users/hansbrende/miniconda3/envs/facade-api/lib/python3.8/site-packages/fastapi/applications.py", line 136, in openapi
self.openapi_schema = get_openapi(
File "/Users/hansbrende/miniconda3/envs/facade-api/lib/python3.8/site-packages/fastapi/openapi/utils.py", line 411, in get_openapi
return jsonable_encoder(OpenAPI(**output), by_alias=True, exclude_none=True) # type: ignore
File "pydantic/main.py", line 406, in pydantic.main.BaseModel.__init__
pydantic.error_wrappers.ValidationError: 3 validation errors for OpenAPI
components -> schemas -> Viewport -> properties -> sw -> items
value is not a valid dict (type=type_error.dict)
components -> schemas -> Viewport -> properties -> ne -> items
value is not a valid dict (type=type_error.dict)
components -> schemas -> Viewport -> $ref
field required (type=value_error.missing)

Operating System

macOS

Operating System Details

No response

FastAPI Version

0.68.0

Python Version

Python 3.8.10

Additional Context

No response

Issue 2:
First Check

I added a very descriptive title to this issue.

I used the GitHub search to find a similar issue and didn't find it.

I searched the FastAPI documentation, with the integrated search.

I already searched in Google "How to X in FastAPI" and didn't find any information.

I already read and followed all the tutorial in the docs and didn't find an answer.

I already checked if it is not related to FastAPI but to Pydantic.

I already checked if it is not related to FastAPI but to Swagger UI.

I already checked if it is not related to FastAPI but to ReDoc.

Commit to Help

I commit to help with one of those options 👆

Example Code

# main.py

import uvicorn
from fastapi import FastAPI, Form

app = FastAPI()

@app.post("/")
def hello(arg: tuple[int, int] = Form(...)) -> str:
pass

if __name__ == "__main__":
uvicorn.run("main:app", port=8080)

Description

Run pip install uvicorn fastapi==0.68.0.

Run python ./main.py

Hit localhost:8080/docs, observe internal server error with below validation errors:

pydantic.error_wrappers.ValidationError: 2 validation errors for OpenAPI
components -> schemas -> Body_hello__post -> properties -> arg -> items
value is not a valid dict (type=type_error.dict)
components -> schemas -> Body_hello__post -> $ref
field required (type=value_error.missing)

Run pip install fastapi==0.67.0

Hit localhost:8080/docs, observe that endpoint documentation is successfully generated.

Operating System

Linux

Operating System Details

Ubuntu 20.04

FastAPI Version

0.68.0 has bug, 0.67.0 does not have bug.

Python Version

3.9

Additional Context

Any use of tuple in an input (Form, and BaseModel as JSON) or output (BaseModel as JSON) results in above error.