django/tests/contenttypes_tests/models.py

from __future__ import absolute_import, unicode_literals

from django.db import models
from django.utils.encoding import python_2_unicode_compatible

@python_2_unicode_compatible
class Author(models.Model):
    name = models.CharField(max_length=100)

    def __str__(self):
        return self.name

    def get_absolute_url(self):
        return '/views/authors/%s/' % self.id

@python_2_unicode_compatible
class Article(models.Model):
    title = models.CharField(max_length=100)
    slug = models.SlugField()
    author = models.ForeignKey(Author)
    date_created = models.DateTimeField()

    def __str__(self):
        return self.title