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