Store the cache alias on the cache backend instance

[tim-schilling]

Code of Conduct

• I agree to follow Django's Code of Conduct

Feature Description

Store the alias used to fetch a cache backend instance on the instance itself.

from django.core.cache import cache

print(cache.alias)
# "default"

Note: It may be beneficial to do this for all implementations of BaseConnectionHandler.

Problem

The Django Debug Toolbar is having to do some extra patching (django-commons/django-debug-toolbar#2219) to retain what alias is being used for which cache. While tolerable, it means the toolbar is having to reimplement more parts of Django, making it more brittle for future versions.

Request or proposal

proposal

Additional Details

It seems reasonable for a user to determine which alias was used when you have a cache backend instance. This may be useful in other contexts that I haven't encountered.

Implementation Suggestions

• Update CacheHandler.create_connection to pass alias as backend_cls(location, params, alias=alias)
• Update django.core.cache.backends.base.BaseCache.__init__ to accept and store alias

[github-actions]

Thank you tim-schilling for sharing your idea! We have a lot of them so please be patient. You can see the current queue here.

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Reaction Guide

• 👍 This is something I would use
• 👎 This is something that would cause problems for me or Django
• 😕 I’m indifferent to this
• 🎉 This is an easy win