from django.contrib.auth import models as auth from django.db import models # No related name is needed here, since symmetrical relations are not # explicitly reversible. class SelfRefer(models.Model): name = models.CharField(max_length=10) references = models.ManyToManyField('self') related = models.ManyToManyField('self') def __str__(self): return self.name 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 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. 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 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='+')