298 lines
8.0 KiB
Python
298 lines
8.0 KiB
Python
import uuid
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from django.contrib.contenttypes.fields import (
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GenericForeignKey, GenericRelation,
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)
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from django.contrib.contenttypes.models import ContentType
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from django.db import models
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from django.db.models.query import ModelIterable, QuerySet
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from django.utils.functional import cached_property
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class Author(models.Model):
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name = models.CharField(max_length=50, unique=True)
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first_book = models.ForeignKey('Book', models.CASCADE, related_name='first_time_authors')
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favorite_authors = models.ManyToManyField(
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'self', through='FavoriteAuthors', symmetrical=False, related_name='favors_me')
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class Meta:
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ordering = ['id']
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def __str__(self):
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return self.name
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class AuthorWithAge(Author):
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author = models.OneToOneField(Author, models.CASCADE, parent_link=True)
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age = models.IntegerField()
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class FavoriteAuthors(models.Model):
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author = models.ForeignKey(Author, models.CASCADE, to_field='name', related_name='i_like')
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likes_author = models.ForeignKey(Author, models.CASCADE, to_field='name', related_name='likes_me')
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class Meta:
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ordering = ['id']
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class AuthorAddress(models.Model):
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author = models.ForeignKey(Author, models.CASCADE, to_field='name', related_name='addresses')
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address = models.TextField()
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class Meta:
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ordering = ['id']
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def __str__(self):
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return self.address
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class Book(models.Model):
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title = models.CharField(max_length=255)
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authors = models.ManyToManyField(Author, related_name='books')
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class Meta:
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ordering = ['id']
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def __str__(self):
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return self.title
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class BookWithYear(Book):
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book = models.OneToOneField(Book, models.CASCADE, parent_link=True)
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published_year = models.IntegerField()
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aged_authors = models.ManyToManyField(
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AuthorWithAge, related_name='books_with_year')
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class Bio(models.Model):
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author = models.OneToOneField(
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Author,
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models.CASCADE,
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primary_key=True,
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to_field='name',
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)
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books = models.ManyToManyField(Book, blank=True)
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class Reader(models.Model):
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name = models.CharField(max_length=50)
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books_read = models.ManyToManyField(Book, related_name='read_by')
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class Meta:
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ordering = ['id']
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def __str__(self):
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return self.name
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class BookReview(models.Model):
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# Intentionally does not have a related name.
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book = models.ForeignKey(BookWithYear, models.CASCADE, null=True)
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notes = models.TextField(null=True, blank=True)
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# Models for default manager tests
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class Qualification(models.Model):
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name = models.CharField(max_length=10)
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class Meta:
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ordering = ['id']
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class ModelIterableSubclass(ModelIterable):
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pass
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class TeacherQuerySet(QuerySet):
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self._iterable_class = ModelIterableSubclass
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class TeacherManager(models.Manager):
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def get_queryset(self):
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return super().get_queryset().prefetch_related('qualifications')
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class Teacher(models.Model):
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name = models.CharField(max_length=50)
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qualifications = models.ManyToManyField(Qualification)
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objects = TeacherManager()
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objects_custom = TeacherQuerySet.as_manager()
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class Meta:
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ordering = ['id']
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def __str__(self):
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return "%s (%s)" % (self.name, ", ".join(q.name for q in self.qualifications.all()))
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class Department(models.Model):
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name = models.CharField(max_length=50)
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teachers = models.ManyToManyField(Teacher)
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class Meta:
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ordering = ['id']
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# GenericRelation/GenericForeignKey tests
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class TaggedItem(models.Model):
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tag = models.SlugField()
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content_type = models.ForeignKey(
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ContentType,
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models.CASCADE,
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related_name="taggeditem_set2",
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)
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object_id = models.PositiveIntegerField()
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content_object = GenericForeignKey('content_type', 'object_id')
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created_by_ct = models.ForeignKey(
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ContentType,
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models.SET_NULL,
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null=True,
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related_name='taggeditem_set3',
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)
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created_by_fkey = models.PositiveIntegerField(null=True)
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created_by = GenericForeignKey('created_by_ct', 'created_by_fkey',)
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favorite_ct = models.ForeignKey(
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ContentType,
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models.SET_NULL,
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null=True,
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related_name='taggeditem_set4',
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)
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favorite_fkey = models.CharField(max_length=64, null=True)
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favorite = GenericForeignKey('favorite_ct', 'favorite_fkey')
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class Meta:
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ordering = ['id']
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def __str__(self):
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return self.tag
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class Bookmark(models.Model):
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url = models.URLField()
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tags = GenericRelation(TaggedItem, related_query_name='bookmarks')
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favorite_tags = GenericRelation(TaggedItem,
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content_type_field='favorite_ct',
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object_id_field='favorite_fkey',
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related_query_name='favorite_bookmarks')
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class Meta:
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ordering = ['id']
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class Comment(models.Model):
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comment = models.TextField()
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# Content-object field
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content_type = models.ForeignKey(ContentType, models.CASCADE)
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object_pk = models.TextField()
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content_object = GenericForeignKey(ct_field="content_type", fk_field="object_pk")
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class Meta:
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ordering = ['id']
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# Models for lookup ordering tests
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class House(models.Model):
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name = models.CharField(max_length=50)
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address = models.CharField(max_length=255)
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owner = models.ForeignKey('Person', models.SET_NULL, null=True)
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main_room = models.OneToOneField('Room', models.SET_NULL, related_name='main_room_of', null=True)
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class Meta:
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ordering = ['id']
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class Room(models.Model):
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name = models.CharField(max_length=50)
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house = models.ForeignKey(House, models.CASCADE, related_name='rooms')
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class Meta:
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ordering = ['id']
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class Person(models.Model):
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name = models.CharField(max_length=50)
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houses = models.ManyToManyField(House, related_name='occupants')
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@property
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def primary_house(self):
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# Assume business logic forces every person to have at least one house.
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return sorted(self.houses.all(), key=lambda house: -house.rooms.count())[0]
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@property
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def all_houses(self):
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return list(self.houses.all())
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@cached_property
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def cached_all_houses(self):
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return self.all_houses
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class Meta:
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ordering = ['id']
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# Models for nullable FK tests
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class Employee(models.Model):
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name = models.CharField(max_length=50)
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boss = models.ForeignKey('self', models.SET_NULL, null=True, related_name='serfs')
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class Meta:
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ordering = ['id']
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def __str__(self):
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return self.name
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# Ticket #19607
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class LessonEntry(models.Model):
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name1 = models.CharField(max_length=200)
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name2 = models.CharField(max_length=200)
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def __str__(self):
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return "%s %s" % (self.name1, self.name2)
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class WordEntry(models.Model):
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lesson_entry = models.ForeignKey(LessonEntry, models.CASCADE)
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name = models.CharField(max_length=200)
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def __str__(self):
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return "%s (%s)" % (self.name, self.id)
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# Ticket #21410: Regression when related_name="+"
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class Author2(models.Model):
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name = models.CharField(max_length=50, unique=True)
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first_book = models.ForeignKey('Book', models.CASCADE, related_name='first_time_authors+')
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favorite_books = models.ManyToManyField('Book', related_name='+')
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class Meta:
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ordering = ['id']
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def __str__(self):
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return self.name
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# Models for many-to-many with UUID pk test:
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class Pet(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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name = models.CharField(max_length=20)
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people = models.ManyToManyField(Person, related_name='pets')
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class Flea(models.Model):
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id = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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current_room = models.ForeignKey(Room, models.SET_NULL, related_name='fleas', null=True)
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pets_visited = models.ManyToManyField(Pet, related_name='fleas_hosted')
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people_visited = models.ManyToManyField(Person, related_name='fleas_hosted')
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