"_MonkeyPatchedWSGIResponse" has no attribute "data"

[ollejernstrom]

"_MonkeyPatchedWSGIResponse" has no attribute "data" test.py:106: error: "_MonkeyPatchedWSGIResponse" has no attribute "data" [attr-defined]sop/tests/test_task_copy.py:106: error: "_MonkeyPatchedWSGIResponse" has no attribute "data" [attr-defined]

Does anyone know why this is?

[intgr]

Why do you think data attribute should exist? I could be missing something, but I don't see it in any of the Django BaseHttpResponse classes.

JsonResponse() accepts a data= constructor argument, but it's not assigned to a property named data.

[intgr]

Also don't see it documented here: https://docs.djangoproject.com/en/5.0/topics/testing/tools/ (only has data= argument on request methods)

[JannKleen]

Could this be related to Django Rest Framework?

Because I had the same issue when using django.test.TransactionTestCase instead of rest_framework.test.APITransactionTestCase. Somehow responses from self.client still had the data property, which are a feature of APIClient (s. https://www.django-rest-framework.org/api-guide/testing/#checking-the-response-data).

The fix would be to use the correct TestCase class, however I'm not sure why the property is there in the first place when using the vanilla Django TestCase.