Support for Django's built in RedisCache cache backend

[pawelad]

Hi!

Django 4.0 was released with a built in RedisCache cache backend (https://docs.djangoproject.com/en/4.1/topics/cache/#redis). As far as I understand, it's a simpler (and built in) alternative to django-redis (jazzband/django-redis#585)

I noticed today that I get a (django_ratelimit.W001) cache backend django.core.cache.backends.redis.RedisCache is not officially supported warning when using it with django-ratelimit. Is that on purpose? Would you be open to adding it to the list of SUPPORTED_CACHE_BACKENDS ? Would that need some extra checks / tests / CI changes?

I'm happy to help with this with a PR.

[jaap3]

I just stumbled upon this and was wondering why I've never seen this check pop up. Turns out that I never added django-ratelimit to INSTALLED_APPS. As far as I can tell it still works as intended. The only thing that happens when it is in installed apps is the registration of this check. Alternatively add django_ratelimit.W001 to settings.SILENCED_SYSTEM_CHECKS in your project and wait until @jsocol or someone else updates the list of SUPPORTED_CACHE_BACKENDS.