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