Since Django now supports async views, I'm trying to change my code base which contains a lot of function based views to be async but for some reason its not working.
@api_view(["GET"])
async def test_async_view(request):
...
data = await get_data()
return Response(data)
When I send a request to this endpoint, I get an error saying:
AssertionError: Expected a
Response,HttpResponseorHttpStreamingResponseto be returned from the view, but received a<class 'coroutine'>
Does DRF not support async views yet? Is there an alternative I can do to get this working?
As of now, DRF doesn't support async "api views". Here is an open issue (#7260) in the DRF community and it is still in the discussion stage.
But, Django providing a decorator/wrapper which allow us to convert our sync views/function to async using sync_to_async(...) wrapper.
Example,
@sync_to_async
@api_view(["GET"])
def sample_view(request):
data = get_data()
return Response(data)Note that, here, sample_view(...) and get_data(...) are sync functions.
I think you can Use this decorator in DRF
import asyncio
from functools import wraps
def to_async(blocking):
@wraps(blocking)
def run_wrapper(*args, **kwargs):
return asyncio.run(blocking(*args, **kwargs))
return run_wrapper
Example of usage
@to_async
@api_view(["GET"])
async def sample_view(request):
...