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I found my mistake in this section of Django the documentation. From the beggining, my apps configurations were never called!

Actually, to register an app correctly, I have two methods:

method 1

INSTALLED_APPS = ['badges', ...]

and declaring in __init__.py: default_app_config = 'badges.apps.BadgesConfig'

method 2

INSTALLED_APPS = ['badges.apps.BadgesConfig']

my mistake

I was using the INSTALLED_APPS = ['badges', ...] without declaring anything in __init__.py

I think maybe Django could display a warning when it notices that apps.py is in a folder app but never used.

I found some solutions here (Expire a view-cache in Django?). It's mostly related to memcached data, but mine is database cached data.

I came up with Django signals to call a function to clear all the cache related to my view. As retrieving keys is not a straightforward thing in db cached data, I simply passed raw SQL to delete the view cache. below is the code snippet.

Note: As I only have one cached view, I am simply deleting it, but if you have multiple per view caches in the cache table you need to be careful when deleting the cache data

cache_table is the name defined to your cache table in settings.py