South add model fails for CustomUser

Question

My project uses django.contrib.auth.models.User. I want to make email field unique, so I have defined CustomUser:

class CustomUser(AbstractBaseUser):
    username = models.CharField(_('username'), max_length=30, unique=True)
    email = models.EmailField(_('Email'), max_length=254, unique=True)
    first_name = models.CharField(_('first name'), max_length=30, blank=True)
    last_name = models.CharField(_('last name'), max_length=30, blank=True)
    is_staff = models.BooleanField(_('staff status'), default=False)
    is_active = models.BooleanField(_('active'), default=True)
    date_joined = models.DateTimeField(_('date joined'), default=timezone.now)

    USERNAME_FIELD = 'username'
    REQUIRED_FIELDS = ['email']

But when I run manage.py schemamigration myapp --auto, I get this error:

AttributeError: Manager isn't available; User has been swapped for 'myapp.models.CustomUser'

What have I done wrong?

Answer 1

As the answer suggests, I had to replace User with my new CustomUser everywhere in my code. Since I forgot to replace it in my django-rest-framework API code, South raised the error during schemamigration command.