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from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
from django.contrib.contenttypes.models import ContentType
from django.db import models
__all__ = (
"Link",
"Place",
"Restaurant",
"Person",
"Address",
"CharLink",
"TextLink",
"OddRelation1",
"OddRelation2",
"Contact",
"Organization",
"Note",
"Company",
)
class Link(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.PositiveIntegerField()
content_object = GenericForeignKey()
class LinkProxy(Link):
class Meta:
proxy = True
class Place(models.Model):
name = models.CharField(max_length=100)
links = GenericRelation(Link, related_query_name="places")
link_proxy = GenericRelation(LinkProxy)
class Restaurant(Place):
pass
class Cafe(Restaurant):
pass
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()
class Person(models.Model):
account = models.IntegerField(primary_key=True)
name = models.CharField(max_length=128)
addresses = GenericRelation(Address)
class CharLink(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.CharField(max_length=100)
content_object = GenericForeignKey()
value = models.CharField(max_length=250)
class TextLink(models.Model):
content_type = models.ForeignKey(ContentType, models.CASCADE)
object_id = models.TextField()
content_object = GenericForeignKey()
value = models.CharField(max_length=250)
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")
class Company(models.Model):
name = models.CharField(max_length=100)
links = GenericRelation(Link)
class Team(models.Model):
name = models.CharField(max_length=15)
def __len__(self):
return 0
class Guild(models.Model):
name = models.CharField(max_length=15)
def __bool__(self):
return False
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=25)
class SpecialGenericRelation(GenericRelation):
def __init__(self, *args, **kwargs):
super().__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, related_query_name="targets")
class Meta:
abstract = True
class HasLinkThing(HasLinks):
pass
class A(models.Model):
flag = models.BooleanField(null=True)
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 models.ProtectedError("Not allowed to delete.", [instance])
models.signals.pre_delete.connect(prevent_deletes, sender=Node)
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