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from django.contrib.contenttypes.fields import (
GenericForeignKey, GenericRelation,
)
from django.contrib.contenttypes.models import ContentType
from django.db import models
from django.db.models.deletion import ProtectedError
from django.utils.encoding import python_2_unicode_compatible
__all__ = ('Link', 'Place', 'Restaurant', 'Person', 'Address',
'CharLink', 'TextLink', 'OddRelation1', 'OddRelation2',
'Contact', 'Organization', 'Note', 'Company')
@python_2_unicode_compatible
class Link(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey()
def __str__(self):
return "Link to %s id=%s" % (self.content_type, self.object_id)
@python_2_unicode_compatible
class Place(models.Model):
name = models.CharField(max_length=100)
links = GenericRelation(Link)
def __str__(self):
return "Place: %s" % self.name
@python_2_unicode_compatible
class Restaurant(Place):
def __str__(self):
return "Restaurant: %s" % self.name
@python_2_unicode_compatible
class Address(models.Model):
street = models.CharField(max_length=80)
city = models.CharField(max_length=50)
state = models.CharField(max_length=2)
zipcode = models.CharField(max_length=5)
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey()
def __str__(self):
return '%s %s, %s %s' % (self.street, self.city, self.state, self.zipcode)
@python_2_unicode_compatible
class Person(models.Model):
account = models.IntegerField(primary_key=True)
name = models.CharField(max_length=128)
addresses = GenericRelation(Address)
def __str__(self):
return self.name
class CharLink(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.CharField(max_length=100)
content_object = GenericForeignKey()
class TextLink(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.TextField()
content_object = GenericForeignKey()
class OddRelation1(models.Model):
name = models.CharField(max_length=100)
clinks = GenericRelation(CharLink)
class OddRelation2(models.Model):
name = models.CharField(max_length=100)
tlinks = GenericRelation(TextLink)
# models for test_q_object_or:
class Note(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey()
note = models.TextField()
class Contact(models.Model):
notes = GenericRelation(Note)
class Organization(models.Model):
name = models.CharField(max_length=255)
contacts = models.ManyToManyField(Contact, related_name='organizations')
@python_2_unicode_compatible
class Company(models.Model):
name = models.CharField(max_length=100)
links = GenericRelation(Link)
def __str__(self):
return "Company: %s" % self.name
# For testing #13085 fix, we also use Note model defined above
class Developer(models.Model):
name = models.CharField(max_length=15)
@python_2_unicode_compatible
class Team(models.Model):
name = models.CharField(max_length=15)
members = models.ManyToManyField(Developer)
def __str__(self):
return "%s team" % self.name
def __len__(self):
return self.members.count()
class Guild(models.Model):
name = models.CharField(max_length=15)
members = models.ManyToManyField(Developer)
def __nonzero__(self):
return self.members.count()
class Tag(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE, related_name='g_r_r_tags')
object_id = models.CharField(max_length=15)
content_object = GenericForeignKey()
label = models.CharField(max_length=15)
class Board(models.Model):
name = models.CharField(primary_key=True, max_length=15)
class SpecialGenericRelation(GenericRelation):
def __init__(self, *args, **kwargs):
super(SpecialGenericRelation, self).__init__(*args, **kwargs)
self.editable = True
self.save_form_data_calls = 0
def save_form_data(self, *args, **kwargs):
self.save_form_data_calls += 1
class HasLinks(models.Model):
links = SpecialGenericRelation(Link)
class Meta:
abstract = True
class HasLinkThing(HasLinks):
pass
class A(models.Model):
flag = models.NullBooleanField()
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey('content_type', 'object_id')
class B(models.Model):
a = GenericRelation(A)
class Meta:
ordering = ('id',)
class C(models.Model):
b = models.ForeignKey(B, models.CASCADE)
class Meta:
ordering = ('id',)
class D(models.Model):
b = models.ForeignKey(B, models.SET_NULL, null=True)
class Meta:
ordering = ('id',)
# Ticket #22998
class Node(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.PositiveIntegerField()
content = GenericForeignKey('content_type', 'object_id')
class Content(models.Model):
nodes = GenericRelation(Node)
related_obj = models.ForeignKey('Related', models.CASCADE)
class Related(models.Model):
pass
def prevent_deletes(sender, instance, **kwargs):
raise ProtectedError("Not allowed to delete.", [instance])
models.signals.pre_delete.connect(prevent_deletes, sender=Node)
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