"""

24. Mutually referential many-to-one relationships

Strings can be used instead of model literals to set up "lazy" relations.

"""

from django.db.models import *

class Parent(Model):

    name = CharField(max_length=100)

    # Use a simple string for forward declarations.

    bestchild = ForeignKey("Child", null=True, related_name="favoured_by")

class Child(Model):

    name = CharField(max_length=100)

    # You can also explicitally specify the related app.

    parent = ForeignKey("mutually_referential.Parent")