from django.db.models import Q OBJECTPERMISSION_OBJECT_TYPES = Q( ~Q(app_label__in=['admin', 'auth', 'contenttypes', 'sessions', 'taggit', 'users']) | Q(app_label='auth', model__in=['group', 'user']) | Q(app_label='users', model__in=['objectpermission', 'token']) ) CONSTRAINT_TOKEN_USER = '$user'