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from django.contrib.auth import models as auth
from django.db import models
from django.utils.encoding import python_2_unicode_compatible
# No related name is needed here, since symmetrical relations are not
# explicitly reversible.
@python_2_unicode_compatible
class SelfRefer(models.Model):
name = models.CharField(max_length=10)
references = models.ManyToManyField('self')
related = models.ManyToManyField('self')
def __str__(self):
return self.name
@python_2_unicode_compatible
class Tag(models.Model):
name = models.CharField(max_length=10)
def __str__(self):
return self.name
# Regression for #11956 -- a many to many to the base class
@python_2_unicode_compatible
class TagCollection(Tag):
tags = models.ManyToManyField(Tag, related_name='tag_collections')
def __str__(self):
return self.name
# A related_name is required on one of the ManyToManyField entries here because
# they are both addressable as reverse relations from Tag.
@python_2_unicode_compatible
class Entry(models.Model):
name = models.CharField(max_length=10)
topics = models.ManyToManyField(Tag)
related = models.ManyToManyField(Tag, related_name="similar")
def __str__(self):
return self.name
# Two models both inheriting from a base model with a self-referential m2m field
class SelfReferChild(SelfRefer):
pass
class SelfReferChildSibling(SelfRefer):
pass
# Many-to-Many relation between models, where one of the PK's isn't an Autofield
@python_2_unicode_compatible
class Line(models.Model):
name = models.CharField(max_length=100)
def __str__(self):
return self.name
class Worksheet(models.Model):
id = models.CharField(primary_key=True, max_length=100)
lines = models.ManyToManyField(Line, blank=True)
# Regression for #11226 -- A model with the same name that another one to
# which it has a m2m relation. This shouldn't cause a name clash between
# the automatically created m2m intermediary table FK field names when
# running migrate
class User(models.Model):
name = models.CharField(max_length=30)
friends = models.ManyToManyField(auth.User)
class BadModelWithSplit(models.Model):
name = models.CharField(max_length=1)
def split(self):
raise RuntimeError('split should not be called')
class Meta:
abstract = True
class RegressionModelSplit(BadModelWithSplit):
"""
Model with a split method should not cause an error in add_lazy_relation
"""
others = models.ManyToManyField('self')
# Regression for #24505 -- Two ManyToManyFields with the same "to" model
# and related_name set to '+'.
class Post(models.Model):
primary_lines = models.ManyToManyField(Line, related_name='+')
secondary_lines = models.ManyToManyField(Line, related_name='+')
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