In 3.14, if a view was not a list view, and it overrode the get_object method, the view did not have to specify the queryset attribute or override the get_queryset() method.

In these cases, the queryset is not needed or used. However, in 3.15 an AssertionError is now thrown in this case. Was this intentional?

This appears to be related to the following call in the UpdateModelMixin which was recently added: queryset = self.filter_queryset(self.get_queryset())

Upgrading to 3.15 introduces a breaking change that could be missed by many, especially as I see no reference to it in the release notes.