How should I build this Django model to do what I want

Question

This is what I had before (but realized that you can't obviously do it in this order:

class MasterAdmin(models.Model):
    """
    A permanent admin (one per Account) that shouldn't be deleted.
    """
    admin = models.OneToOneField(AccountAdmin)

class Account(models.Model):
    """
    A top-level account in the system.
    """
    masteradmin = models.OneToOneField(MasterAdmin)


class AccountAdmin(models.Model):
    """
    An Account admin that can be deleted.  This includes limited permissions.
    """
    account = models.ForeignKey(Account)

I think you can see what I want to do from the example. I want to have an MasterAccountAdmin which shares the attributes from AccountAdmin. The purpose is that I want to give people the ability to delete an AccountAdmin, but not MasterAccountAdmin. I didn't want to just have an attribute on AccountAdmin called "master = models.BooleanField()".

Obviously this example won't work because MasterAdmin is referencing AccountAdmin before its creation, but I wanted to show what I'm trying to achieve. Am I thinking of this all wrong?

Answer 1

Why not just make is_master a property of AccountAdmin and then override the delete() method to ensure is_master is not true?

Answer 2

When you have forward references, use the quotes.

admin = models.OneToOneField('AccountAdmin')

See the docs.

If you need to create a relationship on a model that has not yet been defined, you can use the name of the model, rather than the model object itself...