decorator is causing '422 Unprocessable Entity' error in FastAPI+Swagger

[sinancetinkaya]

I'm learning FastAPI. One of my API endpoints is using AsyncLRU for caching some results. However if I use AsyncLRU decorator on API endpoint, FastAPI can't detect query parameters. Swagger is showing *args, **kwards as query parameters. using functools.wrap solves this problem.

class MyAsyncLRU(AsyncLRU):
    def __call__(self, func):
        @wraps(func)
        async def wrapper(*args, **kwargs):
            key = self._Key(args, kwargs)
            if key in self.lru:
                return self.lru[key]
            else:
                self.lru[key] = await func(*args, **kwargs)
                return self.lru[key]

        wrapper.__name__ += func.__name__

        return wrapper

[synodriver]

fastapi uses inspect to get the parameters of the endpoint function, in order to not influence fastapi, this cache decorator should be used inside the crud model of your app, I think...

[asvetlov]

Agree.