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django/tests/modeltests/m2m_multiple/models.py
Aymeric Augustin d4a0b27838 [py3] Refactored __unicode__ to __str__.
* Renamed the __unicode__ methods
* Applied the python_2_unicode_compatible decorator
* Removed the StrAndUnicode mix-in that is superseded by
  python_2_unicode_compatible
* Kept the __unicode__ methods in classes that specifically
  test it under Python 2
2012-08-12 14:44:40 +02:00

35 lines
1000 B
Python

"""
20. Multiple many-to-many relationships between the same two tables
In this example, an ``Article`` can have many "primary" ``Category`` objects
and many "secondary" ``Category`` objects.
Set ``related_name`` to designate what the reverse relationship is called.
"""
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
@python_2_unicode_compatible
class Category(models.Model):
name = models.CharField(max_length=20)
class Meta:
ordering = ('name',)
def __str__(self):
return self.name
@python_2_unicode_compatible
class Article(models.Model):
headline = models.CharField(max_length=50)
pub_date = models.DateTimeField()
primary_categories = models.ManyToManyField(Category, related_name='primary_article_set')
secondary_categories = models.ManyToManyField(Category, related_name='secondary_article_set')
class Meta:
ordering = ('pub_date',)
def __str__(self):
return self.headline