model inheritance

from django.contrib.auth.models import User

class Profile(User):
    some_additional_profile_field = models.IntegerField()

    class Admin:
        pass

    def __unicode__(self):
        return '%s %s' % (self.first_name, self.last_name)


In [12]: User.objects.all()
Out[12]: [<User: root>]

In [13]: Profile.objects.all()
Out[13]: []

In [14]: root = User.objects.get(username='root')

In [15]: root.pk
Out[15]: 1

In [16]: p = Profile(user_ptr=root)

In [17]: p.karma = 10

In [18]: p.save()

In [19]: User.objects.all()
Out[19]: [<User: >, <User: root>]

WTF?!