default_app_config application variable is deprecated in Django 3.2

[smithdc1]

default_app_config is deprecated in Django 3.2.

https://code.djangoproject.com/ticket/31180

[xordoquy]

My feeling here is: let's not haste here as we still support Django < 3.2 and I have no idea of possible side effects of this removal on projects.

[rpkilby]

These should be conditioned on a version check.

if django.VERSION < (3, 2):
    default_app_config = 'rest_framework.apps.RestFrameworkConfig'

[rpkilby]

possible side effects of this removal on projects.

It looks like Django defaults to AppConfig.

If there is no default_app_config, Django uses the base AppConfig class.

We don't leverage many app config features, so the side effects would be that we'd lose our verbose app names and the one system check.

[rpkilby]

Fixed a minor issue that broke the package docstring but otherwise 👍

[smithdc1]

Squashed and rebased this change.

[xordoquy]

Shouldn't there also be something like DefaultConfig = RestFrameworkConfig in the apps.py ?

[carltongibson]

If there's only a single class, that'll be used as the default. (IIRC 🙂)

[xordoquy]

Indeed, that's what I understand from django/django@3f2821a