1
0
mirror of https://github.com/django/django.git synced 2024-12-23 09:36:06 +00:00
django/tests/model_meta/models.py
David Smith 097e3a70c1 Refs #33476 -- Applied Black's 2023 stable style.
Black 23.1.0 is released which, as the first release of the year,
introduces the 2023 stable style. This incorporates most of last year's
preview style.

https://github.com/psf/black/releases/tag/23.1.0
2023-02-01 11:04:38 +01:00

184 lines
5.4 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:
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", 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", 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", 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