mirror of
https://github.com/django/django.git
synced 2025-10-25 22:56:12 +00:00
82 lines
2.1 KiB
Python
82 lines
2.1 KiB
Python
from django.contrib.auth.models import User
|
|
from django.contrib.contenttypes.fields import GenericForeignKey, GenericRelation
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.db import models
|
|
|
|
|
|
class Review(models.Model):
|
|
source = models.CharField(max_length=100)
|
|
content_type = models.ForeignKey(ContentType, models.CASCADE)
|
|
object_id = models.PositiveIntegerField()
|
|
content_object = GenericForeignKey()
|
|
|
|
class Meta:
|
|
ordering = ("source",)
|
|
|
|
def __str__(self):
|
|
return self.source
|
|
|
|
|
|
class PersonManager(models.Manager):
|
|
def get_by_natural_key(self, name):
|
|
return self.get(name=name)
|
|
|
|
|
|
class Person(models.Model):
|
|
name = models.CharField(max_length=100, unique=True)
|
|
|
|
objects = PersonManager()
|
|
|
|
class Meta:
|
|
ordering = ("name",)
|
|
|
|
def __str__(self):
|
|
return self.name
|
|
|
|
|
|
# This book manager doesn't do anything interesting; it just
|
|
# exists to strip out the 'extra_arg' argument to certain
|
|
# calls. This argument is used to establish that the BookManager
|
|
# is actually getting used when it should be.
|
|
class BookManager(models.Manager):
|
|
def create(self, *args, extra_arg=None, **kwargs):
|
|
return super().create(*args, **kwargs)
|
|
|
|
def get_or_create(self, *args, extra_arg=None, **kwargs):
|
|
return super().get_or_create(*args, **kwargs)
|
|
|
|
|
|
class Book(models.Model):
|
|
title = models.CharField(max_length=100)
|
|
published = models.DateField()
|
|
authors = models.ManyToManyField(Person)
|
|
editor = models.ForeignKey(
|
|
Person, models.SET_NULL, null=True, related_name="edited"
|
|
)
|
|
reviews = GenericRelation(Review)
|
|
pages = models.IntegerField(default=100)
|
|
|
|
objects = BookManager()
|
|
|
|
class Meta:
|
|
ordering = ("title",)
|
|
|
|
def __str__(self):
|
|
return self.title
|
|
|
|
|
|
class Pet(models.Model):
|
|
name = models.CharField(max_length=100)
|
|
owner = models.ForeignKey(Person, models.CASCADE)
|
|
|
|
class Meta:
|
|
ordering = ("name",)
|
|
|
|
|
|
class UserProfile(models.Model):
|
|
user = models.OneToOneField(User, models.SET_NULL, null=True)
|
|
flavor = models.CharField(max_length=100)
|
|
|
|
class Meta:
|
|
ordering = ("flavor",)
|