| """ |
| 28. Many-to-many relationships between the same two tables |
| |
| In this example, a ``Person`` can have many friends, who are also ``Person`` |
| objects. Friendship is a symmetrical relationship - if I am your friend, you |
| are my friend. Here, ``friends`` is an example of a symmetrical |
| ``ManyToManyField``. |
| |
| A ``Person`` can also have many idols - but while I may idolize you, you may |
| not think the same of me. Here, ``idols`` is an example of a non-symmetrical |
| ``ManyToManyField``. Only recursive ``ManyToManyField`` fields may be |
| non-symmetrical, and they are symmetrical by default. |
| |
| This test validates that the many-to-many table is created using a mangled name |
| if there is a name clash, and tests that symmetry is preserved where |
| appropriate. |
| """ |
| |
| from django.db import models |
| |
| |
| class Person(models.Model): |
| name = models.CharField(max_length=20) |
| friends = models.ManyToManyField('self') |
| idols = models.ManyToManyField('self', symmetrical=False, related_name='stalkers') |
| |
| def __unicode__(self): |
| return self.name |
