N+1 Query

[aropan]

In Django 4.2, I encountered an "N+1 query" issue when using {% perms... %} in templates. The problem was caused by the anonymous user, though it worked fine for regular users:

django-guardian/guardian/backends.py

Lines 29 to 36 in 77de203

	if not user_obj.is_authenticated:
	# If anonymous user permission is disabled then they are always
	# unauthorized
	if settings.ANONYMOUS_USER_NAME is None:
	return False, user_obj
	User = get_user_model()
	lookup = {User.USERNAME_FIELD: settings.ANONYMOUS_USER_NAME}
	user_obj = User.objects.get(**lookup)

I resolved this by setting ANONYMOUS_USER_NAME to None. More details can be found in the Django Guardian documentation: https://django-guardian.readthedocs.io/en/stable/configuration.html#anonymous-user-name.