How to use custom AdminSite class?

Question

Which is the best way to implement my own django.contrib.admin.sites.AdminSite?

Actually I get a problem with the registration of INSTALLED_APPS

Answer 1

From Django 2.1, there is an 'out-of-the-box' solution: https://docs.djangoproject.com/en/2.1/ref/contrib/admin/#overriding-the-default-admin-site

from django.contrib import admin

class MyAdminSite(admin.AdminSite):
...

Swapping the custom admin site is now done by adding your own AdminConfig to installed apps.

from django.contrib.admin.apps import AdminConfig

class MyAdminConfig(AdminConfig):
    default_site = 'myproject.admin.MyAdminSite'

INSTALLED_APPS = [
    ...
    'myproject.apps.MyAdminConfig',  # replaces 'django.contrib.admin'
    ...
]

Note the difference between AdminConfig and SimpleAdminConfig, where the latter doesn't trigger admin.autodiscover(). I'm currently using this solution in a project.