Alias for path param does not work when hypens are used in it.

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Example Code

from fastapi import FastAPI, Path

app = FastAPI()

@app.get("/{my-id}/list")
def list_items(
        my_id: str = Path(alias="my-id")
):
    return {"aa": my_id}

Description

On hitting

curl -X 'GET' \
  'http://localhost:8000/sample/list' \
  -H 'accept: application/json'

I get 404 error

{
  "detail": "Not Found"
}

Operating System

Windows

Operating System Details

No response

FastAPI Version

0.79.0

Python Version

3.9.10

Additional Context

This behaviour is working fine with Query param alias but not with Path param alias

[JarroVGIT]

This doesn’t make any sense to want; you are trying to create an invalid python variable name with a hyphen, which is never used outside the scope of python itself. Not like for example query parameters, where the name of the parameter is exposed to the end user in the URL.

Can I ask why you would want to do this?

[OH-ELYADATA]

@tiangolo any idea on why it isn’t working when using hyphens in path parameter aliases? is this planned to be fixed?