`/docs` return 404 after adding api_version_default_value

[rawwar]

Describe the bug

I used the example given in docs - Link

In the code, I added the default version by updating Cadwyn object creation as below

app = Cadwyn(versions=version_bundle, title="My amazing API", api_version_default_value="2002-01-01")

Without the api_version_default_value , /docs shows the API Contracts page. However, after setting the value, /docs returns {"detail":"Not Found"}

[rawwar]

So, I debugged the app to see the routes, and I see /docs to be present:

 Route(path='/docs', name='swagger_dashboard', methods=['GET', 'HEAD']), 

So, I tried to set the header x-api-version with an empty value, and it did return the OpenAPI Contracts page.

[zmievsa]

Thanks, @rawwar ! I'll fix it today

[rawwar]

Thanks, @rawwar ! I'll fix it today

I've been going through the source code, trying to figure out how to fix it. So far, I'm unable to. Looking forward to the fix!

[rawwar]

@zmievsa , I noticed one more issue(Not sure if its an issue):

I added a new simple endpoint to the example app:

@router.get("/test")
async def test():
    return {"test": "test"}

And, when I include api_version_default_value , and try to do the following request:

curl http://localhost:8000/test

I get below error:

{
    "detail": [
        {
            "type": "missing",
            "loc": [
                "header",
                "x-api-version"
            ],
            "msg": "Field required",
            "input": null
        }
    ]
}

And, when I do include x-api-version header, as below:

curl  'http://localhost:8000/test' --header 'x-api-version;'

I get 404:

{
    "detail": "Not Found"
}

[zmievsa]

Apologies for this total blunder: default value is actually a very-very new feature so it's not as well tested as others. Will fix this too.

[zmievsa]

Fixed in 5.2.1! Please, report if it persists!

[rawwar]

Fixed in 5.2.1! Please, report if it persists!

Thank you!

[rawwar]

@zmievsa , this worked for the example app. But, did not work for airflow app - apache/airflow#48548

So, here's what I have tried:

curl to http://localhost:8080/execution/docs without version header(airflow uses custom one - Airflow-API-Version) returns 404 Not found.

Curl to http://localhost:8080/execution/docs with header Airflow-API-Version, but without value returns API contracts

Curl to http://localhost:8080/execution/docs with header Airflow-API-Version, with value "2025-03-26" (Link) returns 404 Not found

EDIT: I am unable to reopen the issue. Should I create a fresh issue?