Django ASGI based async views do not create Transactions

[antonpirker]

If there is an async view in Django then a transaction should be created for that view.

It seems that this is not the case right now: https://github.com/getsentry/sentry-python/blob/antonpirker/trace-origin-in-integrations/tests/integrations/django/asgi/test_asgi.py#L340

The view triggered in the linked test above should create a transaction.

There was a change in Django that we missed: #3141

We need to make sure that async views in Django emit transactions:

• when run with Django channels (channels.http.AsgiHandler is monkey patched to start transactions)
• when running with Djangos own ASGI handler (django.core.handlers.asgi.ASGIHandler only available in Django 3.0+)

Make sure this works in old Django (<3.0) and also newer Djangos. When checking newer Djangos make sure it works when using Channels or Djangos built in ASGI handler.

[szokeasaurusrex]

Looks like the problem is only for sync views on async applications

Update: issue appears to be the same for both, I likely had changed something more than just async/sync when I reached this conclusion