Python Django Extending the existing User model with custom fields

1)
django-admin startproject mypro
django-admin startapp app1

2)
#vim mypro/app1/models.py

from django.contrib.auth.models import User
from django.db import models

class Employee(models.Model):
    user = models.OneToOneField(User)
    department = models.CharField(max_length=100)



3)
#vim mypro/mypro/settings.py
* add 'app1' in INSTALLED_APPS

4)
#cd mypro
#python manage.py syncdb

5)
#cd mypro
#python manage.py shell


>>> from django.contrib.auth.models import User
>>> u = User.objects.all()[0]
>>> u.employee
>>> u.empoyee.department

----------

>>> e = Employee()
>>> e.user = u
>>> e.department = "dddddd"
>>> e.save()
>>> u.employee

>>>
>>>
>>> u.employee.department
'dddddd'

----------