Django REST Cache Invalidation

Question

I have a Django project and API view implemented with the Rest framework. I'm caching it using the @cache_page decorator but I need to implement a cache invalidation and I'm not seeing how to do that - do I need a custom decorator?

The problem: The view checks the access of the API KEY and it caches it from the previous access check but, if the user changes the API KEY before the cache expires, the view will return an OK status of the key that no longer exists.

AKX · Accepted Answer · 2020-04-17 17:15:53Z

1

Yes, you'll need a cache decorator that takes the authentication/user context into account. cache_page() only works for GET requests, and keys based on the URL alone.

Better yet, though,

Don't use a cache until you're sure you need one
If you do need it (think about why; cache invalidation is one of the two hard things), use a more granular cache within your view, not cache_page().

answered Apr 17, 2020 at 17:15

AKX

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3 Comments

Diego Moraes Over a year ago

Yes, i'm using it with a key based url on a GET req, i really need it because im getting slow responses from that view. Do you recommendo implement my own cache_page decorator?

AKX Over a year ago

No. Use a granular cache within that view, then; cache the data that's slow to retrieve.

Diego Moraes Over a year ago

Got it! Thanks!!

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