/tests/modeltests/m2o_recursive/models.py
https://code.google.com/p/mango-py/ · Python · 28 lines · 24 code · 0 blank · 4 comment · 0 complexity · 96220b891ed29a24a3cd2bf793d6c777 MD5 · raw file
- """
- 11. Relating an object to itself, many-to-one
- To define a many-to-one relationship between a model and itself, use
- ``ForeignKey('self')``.
- In this example, a ``Category`` is related to itself. That is, each
- ``Category`` has a parent ``Category``.
- Set ``related_name`` to designate what the reverse relationship is called.
- """
- from django.db import models
- class Category(models.Model):
- name = models.CharField(max_length=20)
- parent = models.ForeignKey('self', blank=True, null=True, related_name='child_set')
- def __unicode__(self):
- return self.name
- class Person(models.Model):
- full_name = models.CharField(max_length=20)
- mother = models.ForeignKey('self', null=True, related_name='mothers_child_set')
- father = models.ForeignKey('self', null=True, related_name='fathers_child_set')
- def __unicode__(self):
- return self.full_name