mirror of
https://github.com/django/django.git
synced 2024-12-26 02:56:25 +00:00
25264c8604
git-svn-id: http://code.djangoproject.com/svn/django/trunk@549 bcc190cf-cafb-0310-a4f2-bffc1f526a37
44 lines
1.2 KiB
Python
44 lines
1.2 KiB
Python
"""
|
|
12. Relating a model to another model more than once
|
|
|
|
In this example, a ``Person`` can have a ``mother`` and ``father`` -- both of
|
|
which are other ``Person`` objects.
|
|
|
|
Set ``related_name`` to designate what the reverse relationship is called.
|
|
"""
|
|
|
|
from django.core import meta
|
|
|
|
class Person(meta.Model):
|
|
full_name = meta.CharField(maxlength=20)
|
|
mother = meta.ForeignKey('self', null=True, related_name='mothers_child')
|
|
father = meta.ForeignKey('self', null=True, related_name='fathers_child')
|
|
|
|
def __repr__(self):
|
|
return self.full_name
|
|
|
|
API_TESTS = """
|
|
# Create two Person objects -- the mom and dad in our family.
|
|
>>> dad = persons.Person(full_name='John Smith Senior', mother=None, father=None)
|
|
>>> dad.save()
|
|
>>> mom = persons.Person(full_name='Jane Smith', mother=None, father=None)
|
|
>>> mom.save()
|
|
|
|
# Give mom and dad a kid.
|
|
>>> kid = persons.Person(full_name='John Smith Junior', mother=mom, father=dad)
|
|
>>> kid.save()
|
|
|
|
>>> kid.get_mother()
|
|
Jane Smith
|
|
>>> kid.get_father()
|
|
John Smith Senior
|
|
>>> dad.get_fathers_child_list()
|
|
[John Smith Junior]
|
|
>>> mom.get_mothers_child_list()
|
|
[John Smith Junior]
|
|
>>> kid.get_mothers_child_list()
|
|
[]
|
|
>>> kid.get_fathers_child_list()
|
|
[]
|
|
"""
|