/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

  1. """
  2. 11. Relating an object to itself, many-to-one
  3. To define a many-to-one relationship between a model and itself, use
  4. ``ForeignKey('self')``.
  5. In this example, a ``Category`` is related to itself. That is, each
  6. ``Category`` has a parent ``Category``.
  7. Set ``related_name`` to designate what the reverse relationship is called.
  8. """
  9. from django.db import models
  10. class Category(models.Model):
  11. name = models.CharField(max_length=20)
  12. parent = models.ForeignKey('self', blank=True, null=True, related_name='child_set')
  13. def __unicode__(self):
  14. return self.name
  15. class Person(models.Model):
  16. full_name = models.CharField(max_length=20)
  17. mother = models.ForeignKey('self', null=True, related_name='mothers_child_set')
  18. father = models.ForeignKey('self', null=True, related_name='fathers_child_set')
  19. def __unicode__(self):
  20. return self.full_name