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djangoforeign-keysmodels

Circular import in FK default value when using custom model

I'm trying to define in my app models.py a foreign key default value to a custom user model such as:

  owner = models.ForeignKey(settings.AUTH_USER_MODEL, null=False, 
           default=get_user_model().objects.get()[0].pk)

The custom user model is also defined in the same models.py

However, I get the ugly circular import problem in another app models.py when they try to use get_user_model():

django.core.exceptions.ImproperlyConfigured: AUTH_USER_MODEL refers to
model 'myapp.MyCustomUserModel' that has not been installed

How do I solve this?

Solution

  • Add a method to get default owner instead of putting it as value.

    owner = models.ForeignKey(settings.AUTH_USER_MODEL, null=False, 
                          default=get_default_owner)

#this can be a global method and need not be in same model.
def get_default_owner():
    return get_user_model().objects.get()[0]