django/tests/model_meta/models.py

159 lines
5.3 KiB
Python

from django.contrib.contenttypes.fields import (
GenericForeignKey, GenericRelation,
)
from django.contrib.contenttypes.models import ContentType
from django.db import models
class Relation(models.Model):
pass
class InstanceOnlyDescriptor(object):
def __get__(self, instance, cls=None):
if instance is None:
raise AttributeError('Instance only')
return 1
class AbstractPerson(models.Model):
# DATA fields
data_abstract = models.CharField(max_length=10)
fk_abstract = models.ForeignKey(Relation, models.CASCADE, related_name='fk_abstract_rel')
# M2M fields
m2m_abstract = models.ManyToManyField(Relation, related_name='m2m_abstract_rel')
friends_abstract = models.ManyToManyField('self', related_name='friends_abstract', symmetrical=True)
following_abstract = models.ManyToManyField('self', related_name='followers_abstract', symmetrical=False)
# VIRTUAL fields
data_not_concrete_abstract = models.ForeignObject(
Relation,
on_delete=models.CASCADE,
from_fields=['abstract_non_concrete_id'],
to_fields=['id'],
related_name='fo_abstract_rel',
)
# GFK fields
content_type_abstract = models.ForeignKey(ContentType, models.CASCADE, related_name='+')
object_id_abstract = models.PositiveIntegerField()
content_object_abstract = GenericForeignKey('content_type_abstract', 'object_id_abstract')
# GR fields
generic_relation_abstract = GenericRelation(Relation)
class Meta:
abstract = True
@property
def test_property(self):
return 1
test_instance_only_descriptor = InstanceOnlyDescriptor()
class BasePerson(AbstractPerson):
# DATA fields
data_base = models.CharField(max_length=10)
fk_base = models.ForeignKey(Relation, models.CASCADE, related_name='fk_base_rel')
# M2M fields
m2m_base = models.ManyToManyField(Relation, related_name='m2m_base_rel')
friends_base = models.ManyToManyField('self', related_name='friends_base', symmetrical=True)
following_base = models.ManyToManyField('self', related_name='followers_base', symmetrical=False)
# VIRTUAL fields
data_not_concrete_base = models.ForeignObject(
Relation,
on_delete=models.CASCADE,
from_fields=['base_non_concrete_id'],
to_fields=['id'],
related_name='fo_base_rel',
)
# GFK fields
content_type_base = models.ForeignKey(ContentType, models.CASCADE, related_name='+')
object_id_base = models.PositiveIntegerField()
content_object_base = GenericForeignKey('content_type_base', 'object_id_base')
# GR fields
generic_relation_base = GenericRelation(Relation)
class Person(BasePerson):
# DATA fields
data_inherited = models.CharField(max_length=10)
fk_inherited = models.ForeignKey(Relation, models.CASCADE, related_name='fk_concrete_rel')
# M2M Fields
m2m_inherited = models.ManyToManyField(Relation, related_name='m2m_concrete_rel')
friends_inherited = models.ManyToManyField('self', related_name='friends_concrete', symmetrical=True)
following_inherited = models.ManyToManyField('self', related_name='followers_concrete', symmetrical=False)
# VIRTUAL fields
data_not_concrete_inherited = models.ForeignObject(
Relation,
on_delete=models.CASCADE,
from_fields=['model_non_concrete_id'],
to_fields=['id'],
related_name='fo_concrete_rel',
)
# GFK fields
content_type_concrete = models.ForeignKey(ContentType, models.CASCADE, related_name='+')
object_id_concrete = models.PositiveIntegerField()
content_object_concrete = GenericForeignKey('content_type_concrete', 'object_id_concrete')
# GR fields
generic_relation_concrete = GenericRelation(Relation)
class ProxyPerson(Person):
class Meta:
proxy = True
class PersonThroughProxySubclass(ProxyPerson):
pass
class Relating(models.Model):
# ForeignKey to BasePerson
baseperson = models.ForeignKey(BasePerson, models.CASCADE, related_name='relating_baseperson')
baseperson_hidden = models.ForeignKey(BasePerson, models.CASCADE, related_name='+')
# ForeignKey to Person
person = models.ForeignKey(Person, models.CASCADE, related_name='relating_person')
person_hidden = models.ForeignKey(Person, models.CASCADE, related_name='+')
# ForeignKey to ProxyPerson
proxyperson = models.ForeignKey(ProxyPerson, models.CASCADE, related_name='relating_proxyperson')
proxyperson_hidden = models.ForeignKey(ProxyPerson, models.CASCADE, related_name='relating_proxyperson_hidden+')
# ManyToManyField to BasePerson
basepeople = models.ManyToManyField(BasePerson, related_name='relating_basepeople')
basepeople_hidden = models.ManyToManyField(BasePerson, related_name='+')
# ManyToManyField to Person
people = models.ManyToManyField(Person, related_name='relating_people')
people_hidden = models.ManyToManyField(Person, related_name='+')
# ParentListTests models
class CommonAncestor(models.Model):
pass
class FirstParent(CommonAncestor):
first_ancestor = models.OneToOneField(CommonAncestor, models.CASCADE, primary_key=True, parent_link=True)
class SecondParent(CommonAncestor):
second_ancestor = models.OneToOneField(CommonAncestor, models.CASCADE, primary_key=True, parent_link=True)
class Child(FirstParent, SecondParent):
pass