Django : How can I find a list of models that the ORM knows?

Question

In Django, is there a place I can get a list of or look up the models that the ORM knows about?

Answer 1

Here's a simple way to find and delete any permissions that exist in the database but don't exist in the ORM model definitions:

from django.apps import apps
from django.contrib.auth.management import _get_all_permissions
from django.contrib.auth.models import Permission
from django.core.management.base import BaseCommand


class Command(BaseCommand):
    def handle(self, *args, **options):
        builtins = []
        for klass in apps.get_models():
            for perm in _get_all_permissions(klass._meta):
                builtins.append(perm[0])
        builtins = set(builtins)

        permissions = set(Permission.objects.all().values_list('codename', flat=True))
        to_remove = permissions - builtins
        res = Permission.objects.filter(codename__in=to_remove).delete()
        self.stdout.write('Deleted records: ' + str(res))