mirror of
https://github.com/django/django.git
synced 2024-12-26 11:06:07 +00:00
287565779d
only consider some fields (PostgreSQL only). For this, the ``distinct()`` QuerySet method now accepts an optional list of model fields names and generates ``DISTINCT ON`` clauses on these cases. Thanks Jeffrey Gelens and Anssi Kääriäinen for their work. Fixes #6422. git-svn-id: http://code.djangoproject.com/svn/django/trunk@17244 bcc190cf-cafb-0310-a4f2-bffc1f526a37
40 lines
1.1 KiB
Python
40 lines
1.1 KiB
Python
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)
|