mirror of https://github.com/django/django.git
173 lines
4.5 KiB
Python
173 lines
4.5 KiB
Python
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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class Square(models.Model):
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root = models.IntegerField()
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square = models.PositiveIntegerField()
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def __str__(self):
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return "%s ** 2 == %s" % (self.root, self.square)
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class Person(models.Model):
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first_name = models.CharField(max_length=20)
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last_name = models.CharField(max_length=20)
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def __str__(self):
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return "%s %s" % (self.first_name, self.last_name)
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class SchoolClassManager(models.Manager):
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def get_queryset(self):
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return super().get_queryset().exclude(year=1000)
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class SchoolClass(models.Model):
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year = models.PositiveIntegerField()
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day = models.CharField(max_length=9, blank=True)
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last_updated = models.DateTimeField()
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objects = SchoolClassManager()
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class SchoolBusManager(models.Manager):
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def get_queryset(self):
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return super().get_queryset().prefetch_related("schoolclasses")
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class SchoolBus(models.Model):
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number = models.IntegerField()
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schoolclasses = models.ManyToManyField("SchoolClass")
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objects = SchoolBusManager()
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class Meta:
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base_manager_name = "objects"
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class VeryLongModelNameZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ(models.Model):
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primary_key_is_quite_long_zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz = models.AutoField(
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primary_key=True
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)
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charfield_is_quite_long_zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz = models.CharField(
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max_length=100
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)
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m2m_also_quite_long_zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz = (
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models.ManyToManyField(Person, blank=True)
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)
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class Tag(models.Model):
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name = models.CharField(max_length=30)
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content_type = models.ForeignKey(
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ContentType, models.CASCADE, related_name="backend_tags"
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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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class Post(models.Model):
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name = models.CharField(max_length=30)
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text = models.TextField()
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tags = GenericRelation("Tag")
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class Meta:
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db_table = "CaseSensitive_Post"
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class Reporter(models.Model):
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first_name = models.CharField(max_length=30)
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last_name = models.CharField(max_length=30)
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def __str__(self):
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return "%s %s" % (self.first_name, self.last_name)
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class ReporterProxy(Reporter):
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class Meta:
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proxy = True
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class Article(models.Model):
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headline = models.CharField(max_length=100)
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pub_date = models.DateField()
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reporter = models.ForeignKey(Reporter, models.CASCADE)
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reporter_proxy = models.ForeignKey(
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ReporterProxy,
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models.SET_NULL,
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null=True,
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related_name="reporter_proxy",
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)
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def __str__(self):
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return self.headline
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class Item(models.Model):
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name = models.CharField(max_length=30)
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date = models.DateField()
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time = models.TimeField()
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last_modified = models.DateTimeField()
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def __str__(self):
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return self.name
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class Object(models.Model):
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related_objects = models.ManyToManyField(
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"self", db_constraint=False, symmetrical=False
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)
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obj_ref = models.ForeignKey("ObjectReference", models.CASCADE, null=True)
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def __str__(self):
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return str(self.id)
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class ObjectReference(models.Model):
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obj = models.ForeignKey(Object, models.CASCADE, db_constraint=False)
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def __str__(self):
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return str(self.obj_id)
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class ObjectSelfReference(models.Model):
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key = models.CharField(max_length=3, unique=True)
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obj = models.ForeignKey("ObjectSelfReference", models.SET_NULL, null=True)
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class CircularA(models.Model):
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key = models.CharField(max_length=3, unique=True)
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obj = models.ForeignKey("CircularB", models.SET_NULL, null=True)
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def natural_key(self):
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return (self.key,)
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class CircularB(models.Model):
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key = models.CharField(max_length=3, unique=True)
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obj = models.ForeignKey("CircularA", models.SET_NULL, null=True)
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def natural_key(self):
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return (self.key,)
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class RawData(models.Model):
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raw_data = models.BinaryField()
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class Author(models.Model):
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name = models.CharField(max_length=255, unique=True)
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class Book(models.Model):
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author = models.ForeignKey(Author, models.CASCADE, to_field="name")
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class SQLKeywordsModel(models.Model):
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id = models.AutoField(primary_key=True, db_column="select")
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reporter = models.ForeignKey(Reporter, models.CASCADE, db_column="where")
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class Meta:
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db_table = "order"
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