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316 lines
8.1 KiB
Python
316 lines
8.1 KiB
Python
import uuid
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from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
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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
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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(
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"Book", models.CASCADE, related_name="first_time_authors"
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)
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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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)
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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(
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Author, models.CASCADE, to_field="name", related_name="i_like"
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)
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likes_author = models.ForeignKey(
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Author, models.CASCADE, to_field="name", related_name="likes_me"
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)
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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(
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Author, models.CASCADE, to_field="name", related_name="addresses"
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)
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address = models.TextField()
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class Meta:
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ordering = ["id"]
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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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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(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(models.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)" % (
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self.name,
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", ".join(q.name for q in self.qualifications.all()),
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)
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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(
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"created_by_ct",
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"created_by_fkey",
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)
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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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class Article(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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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(
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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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)
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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, null=True)
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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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content_type_uuid = models.ForeignKey(
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ContentType, models.CASCADE, related_name="comments", null=True
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)
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object_pk_uuid = models.TextField()
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content_object_uuid = GenericForeignKey(
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ct_field="content_type_uuid", fk_field="object_pk_uuid"
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)
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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(
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"Room", models.SET_NULL, related_name="main_room_of", null=True
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)
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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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# 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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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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# 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(
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"Book", models.CASCADE, related_name="first_time_authors+"
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)
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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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# 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(
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Room, models.SET_NULL, related_name="fleas", null=True
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)
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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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