extending abstract model in Django

Question

I'm using Django 2.x and OAuth Toolkit.

I'm writing an application where I need to add ForeignKey pointing to Application model of OAuth Toolkit plugin, which is defined Abstract.

According to the documentation. I can extend the AbstractApplication and then add in settings

OAUTH2_PROVIDER_APPLICATION_MODEL='your_app_name.MyApplication'

In my case, I have created my app and in models.py

class CustomOAuthToolkitApplication(AbstractApplication):
    pass


class OAuthToolkitTrackingLog(models.Model):

    application_model = settings.OAUTH2_PROVIDER_APPLICATION_MODEL

    application = models.ForeignKey(application_model, on_delete=models.CASCADE, blank=True, default=None, null=True)
    user = models.ForeignKey(User, on_delete=models.SET_NULL, null=True, blank=True, default=None)
    col_1 = models.CharField(max_length=255)

    created = models.DateTimeField(auto_now_add=True)

and in settings.py

INSTALLED_APPS = [
    ...
    'oauth2_provider',
    'my_app',
]

OAUTH2_PROVIDER_APPLICATION_MODEL = 'my_app.CustomOAuthToolkitApplication'

But when I run command to generate migration

python manage.py makemigrations

It gives error as

The field oauth2_provider.Grant.application was declared with a lazy reference to 'my_app.customoauthtoolkitapplication', but app 'my_app' isn't installed.
The field oauth2_provider.RefreshToken.application was declared with a lazy reference to 'my_app.customoauthtoolkitapplication', but app 'my_app' isn't installed.

How can I fix this issue?

Answer 1

Hmmm. I'm not sure. But as far as I remember from django source code, the order in INSTALLED_APPS matters. Could you please try switching places, so:

INSTALLED_APPS = [
  ...
  'my_app',
  'oauth2_provider',
]

So that my_app is higher on the list?