Is it possible to validate all query parameters at once?

[flashgorman-chorus]

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Example Code

from typing import Union

from fastapi import FastAPI

app = FastAPI()


def my_validator(param1: int):
    raise HTTPException(status_code=400, detail="Bad value")


@app.get("/foo")
def read_item(param1: int = Depends(my_validator), param2: int):
    pass

Description

When I use Depends for custom query parameter validation, only the first error is reported. In the example above, if I try to call the API without any value for param2, that never gets reported due to the exception raised by my custom validator used for param1.

Is it possible to get FastAPI to validate all query parameters - even those that use custom validators via Depends - so I can communicate ALL of the problems back to the caller instead of one at a time?

Operating System

macOS

Operating System Details

No response

FastAPI Version

0.89.1

Python Version

3.7.14

Additional Context

No response

[SquarishRectangle]

I cannot reproduce this issue on my machine. It behaves correctly here.

http://127.0.0.1:8000/foo?param1="abc"

returns:
{"detail":[{"loc":["query","param1"],"msg":"value is not a valid integer","type":"type_error.integer"},{"loc":["query","param2"],"msg":"field required","type":"value_error.missing"}]}

Operating System
Windows, Linux

Operating System Details
Ubuntu running on WSL

FastAPI Version
0.89.1

Python Version
3.10.9

[flashgorman-chorus]

My apologies. I realize now this situation only exists when using custom query parameter validation using Depends. I have updated the description accordingly.

What I observe is if you raise from a custom query parameter validator, the other (or remaining) validation is not performed.