from django.contrib.contenttypes import generic from django.contrib.contenttypes.models import ContentType from django.db import models ## Basic tests class Author(models.Model): name = models.CharField(max_length=50, unique=True) first_book = models.ForeignKey('Book', related_name='first_time_authors') favorite_authors = models.ManyToManyField( 'self', through='FavoriteAuthors', symmetrical=False, related_name='favors_me') def __unicode__(self): return self.name class Meta: ordering = ['id'] class AuthorWithAge(Author): author = models.OneToOneField(Author, parent_link=True) age = models.IntegerField() class FavoriteAuthors(models.Model): author = models.ForeignKey(Author, to_field='name', related_name='i_like') likes_author = models.ForeignKey(Author, to_field='name', related_name='likes_me') class Meta: ordering = ['id'] class AuthorAddress(models.Model): author = models.ForeignKey(Author, to_field='name', related_name='addresses') address = models.TextField() class Meta: ordering = ['id'] def __unicode__(self): return self.address class Book(models.Model): title = models.CharField(max_length=255) authors = models.ManyToManyField(Author, related_name='books') def __unicode__(self): return self.title class Meta: ordering = ['id'] class BookWithYear(Book): book = models.OneToOneField(Book, parent_link=True) published_year = models.IntegerField() aged_authors = models.ManyToManyField( AuthorWithAge, related_name='books_with_year') class Reader(models.Model): name = models.CharField(max_length=50) books_read = models.ManyToManyField(Book, related_name='read_by') def __unicode__(self): return self.name class Meta: ordering = ['id'] ## Models for default manager tests class Qualification(models.Model): name = models.CharField(max_length=10) class Meta: ordering = ['id'] class TeacherManager(models.Manager): def get_query_set(self): return super(TeacherManager, self).get_query_set().prefetch_related('qualifications') class Teacher(models.Model): name = models.CharField(max_length=50) qualifications = models.ManyToManyField(Qualification) objects = TeacherManager() def __unicode__(self): return "%s (%s)" % (self.name, ", ".join(q.name for q in self.qualifications.all())) class Meta: ordering = ['id'] class Department(models.Model): name = models.CharField(max_length=50) teachers = models.ManyToManyField(Teacher) class Meta: ordering = ['id'] ## GenericRelation/GenericForeignKey tests class TaggedItem(models.Model): tag = models.SlugField() content_type = models.ForeignKey(ContentType, related_name="taggeditem_set2") object_id = models.PositiveIntegerField() content_object = generic.GenericForeignKey('content_type', 'object_id') created_by_ct = models.ForeignKey(ContentType, null=True, related_name='taggeditem_set3') created_by_fkey = models.PositiveIntegerField(null=True) created_by = generic.GenericForeignKey('created_by_ct', 'created_by_fkey',) def __unicode__(self): return self.tag class Bookmark(models.Model): url = models.URLField() tags = generic.GenericRelation(TaggedItem) class Comment(models.Model): comment = models.TextField() # Content-object field content_type = models.ForeignKey(ContentType) object_pk = models.TextField() content_object = generic.GenericForeignKey(ct_field="content_type", fk_field="object_pk") ## Models for lookup ordering tests class House(models.Model): address = models.CharField(max_length=255) class Meta: ordering = ['id'] class Room(models.Model): name = models.CharField(max_length=50) house = models.ForeignKey(House, related_name='rooms') class Meta: ordering = ['id'] class Person(models.Model): name = models.CharField(max_length=50) houses = models.ManyToManyField(House, related_name='occupants') @property def primary_house(self): # Assume business logic forces every person to have at least one house. return sorted(self.houses.all(), key=lambda house: -house.rooms.count())[0] class Meta: ordering = ['id'] ## Models for nullable FK tests class Employee(models.Model): name = models.CharField(max_length=50) boss = models.ForeignKey('self', null=True, related_name='serfs') def __unicode__(self): return self.name class Meta: ordering = ['id']