No compatibility with django.contrib.auth.apps.AuthConfig

[afedosenko]

Problem

class AuthConfig(AppConfig):
    name = 'django.contrib.auth'
    verbose_name = _("Authentication and Authorization")

    def ready(self):
        post_migrate.connect(
            create_permissions,
            dispatch_uid="django.contrib.auth.management.create_permissions"
        )
        last_login_field = getattr(get_user_model(), 'last_login', None)
        # Register the handler only if UserModel.last_login is a field.
        if isinstance(last_login_field, DeferredAttribute):
            from .models import update_last_login
            user_logged_in.connect(update_last_login, dispatch_uid='update_last_login')
        checks.register(check_user_model, checks.Tags.models)
        checks.register(check_models_permissions, checks.Tags.models)

if isinstance(last_login_field, DeferredAttribute): is negative
because type(last_login_field) = <class 'model_utils.tracker.DescriptorWrapper'>

Environment

• Django Model Utils version: 4.1.1
• Django version: 2.2.24
• Python version: 3.7.12

[MRigal]

Hi @afedosenko
Could you post your custom user model? There might be an issue over there

[afedosenko]

Hello @MRigal

from django.contrib.auth.models import AbstractUser
from model_utils import FieldTracker


class CustomUser(AbstractUser):
    tracker = FieldTracker()

[tumb1er]

Using FieldTracker on custom user model has a long history of issues here on github, and it depends on Django's bugfix also.
I.e.:

#423
#331
#382

https://code.djangoproject.com/ticket/30427#ticket

Looks like it's fixed in Django-4.0

[daniel-butler]

#514 This is a related issue