[BUG] [Python] Fast Api Generator Ignoring deprecated field

Bug Report Checklist

• Have you provided a full/minimal spec to reproduce the issue?
• Have you validated the input using an OpenAPI validator?
• Have you tested with the latest master to confirm the issue still exists?
• Have you searched for related issues/PRs?
• What's the actual output vs expected output?
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Description

[BUG] [Python] Fast Api Generator Ignoring deprecated field

openapi-generator version

Name docker.io/openapitools/openapi-generator-cli
Tag latest
ID sha256:6aecb9a9366977b5cb48eb06a3e21b5a1dced7de8794acc052732ac7b0862604
Size 303.5 MB
Age 1 month

OpenAPI declaration file content or url

https://github.com/lek18/openapi-101/blob/main/openapi.json

Generation Details

sh scripts/reload_open_api_spec.sh

Steps to reproduce

0. clone the above repo.
1. run the above script
2. inspect the file : src/openapi_server/apis/default_api.py
3. the /deprecate-endpoint is not having deprecate=True

@router.get(
    "/deprecated-endpoint",
    responses={
        200: {"model": DeprecatedEndpointGet200Response, "description": "Successful response"},
    },
    tags=["default"],
    summary="Deprecated Endpoint",
    response_model_by_alias=True,
)
async def deprecated_endpoint_get(
) -> DeprecatedEndpointGet200Response:
    """This endpoint is deprecated and will be removed in the future."""
    if not BaseDefaultApi.subclasses:
        raise HTTPException(status_code=500, detail="Not implemented")
    return await BaseDefaultApi.subclasses[0]().deprecated_endpoint_get()

Related issues/PRs

Suggest a fix

Start with the OpenAPI declaration in the linked openapi.json repository and run scripts/reload_open_api_spec.sh. Inspect the generated src/openapi_server/apis/default_api.py for the deprecated endpoint and trace how its deprecated field is represented. Done means the generated route includes the expected deprecation setting.