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django/tests/modeltests/distinct_on_fields/models.py

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from django.db import models
class Tag(models.Model):
name = models.CharField(max_length=10)
parent = models.ForeignKey('self', blank=True, null=True,
related_name='children')
class Meta:
ordering = ['name']
def __unicode__(self):
return self.name
class Celebrity(models.Model):
name = models.CharField("Name", max_length=20)
greatest_fan = models.ForeignKey("Fan", null=True, unique=True)
def __unicode__(self):
return self.name
class Fan(models.Model):
fan_of = models.ForeignKey(Celebrity)
class Staff(models.Model):
id = models.IntegerField(primary_key=True)
name = models.CharField(max_length=50)
organisation = models.CharField(max_length=100)
tags = models.ManyToManyField(Tag, through='StaffTag')
coworkers = models.ManyToManyField('self')
def __unicode__(self):
return self.name
class StaffTag(models.Model):
staff = models.ForeignKey(Staff)
tag = models.ForeignKey(Tag)
def __unicode__(self):
return u"%s -> %s" % (self.tag, self.staff)