mirror of
https://github.com/encode/django-rest-framework.git
synced 2025-11-04 01:47:59 +03:00
105 lines
3.1 KiB
Python
105 lines
3.1 KiB
Python
from __future__ import unicode_literals
|
|
from django.contrib.contenttypes.models import ContentType
|
|
from django.contrib.contenttypes.generic import GenericRelation, GenericForeignKey
|
|
from django.db import models
|
|
from django.test import TestCase
|
|
from django.utils.encoding import python_2_unicode_compatible
|
|
from rest_framework import serializers
|
|
|
|
|
|
@python_2_unicode_compatible
|
|
class Tag(models.Model):
|
|
"""
|
|
Tags have a descriptive slug, and are attached to an arbitrary object.
|
|
"""
|
|
tag = models.SlugField()
|
|
content_type = models.ForeignKey(ContentType)
|
|
object_id = models.PositiveIntegerField()
|
|
tagged_item = GenericForeignKey('content_type', 'object_id')
|
|
|
|
def __str__(self):
|
|
return self.tag
|
|
|
|
|
|
@python_2_unicode_compatible
|
|
class Bookmark(models.Model):
|
|
"""
|
|
A URL bookmark that may have multiple tags attached.
|
|
"""
|
|
url = models.URLField()
|
|
tags = GenericRelation(Tag)
|
|
|
|
def __str__(self):
|
|
return 'Bookmark: %s' % self.url
|
|
|
|
|
|
@python_2_unicode_compatible
|
|
class Note(models.Model):
|
|
"""
|
|
A textual note that may have multiple tags attached.
|
|
"""
|
|
text = models.TextField()
|
|
tags = GenericRelation(Tag)
|
|
|
|
def __str__(self):
|
|
return 'Note: %s' % self.text
|
|
|
|
|
|
class TestGenericRelations(TestCase):
|
|
def setUp(self):
|
|
self.bookmark = Bookmark.objects.create(url='https://www.djangoproject.com/')
|
|
Tag.objects.create(tagged_item=self.bookmark, tag='django')
|
|
Tag.objects.create(tagged_item=self.bookmark, tag='python')
|
|
self.note = Note.objects.create(text='Remember the milk')
|
|
Tag.objects.create(tagged_item=self.note, tag='reminder')
|
|
|
|
def test_generic_relation(self):
|
|
"""
|
|
Test a relationship that spans a GenericRelation field.
|
|
IE. A reverse generic relationship.
|
|
"""
|
|
|
|
class BookmarkSerializer(serializers.ModelSerializer):
|
|
tags = serializers.StringRelatedField(many=True)
|
|
|
|
class Meta:
|
|
model = Bookmark
|
|
fields = ('tags', 'url')
|
|
|
|
serializer = BookmarkSerializer(self.bookmark)
|
|
expected = {
|
|
'tags': ['django', 'python'],
|
|
'url': 'https://www.djangoproject.com/'
|
|
}
|
|
self.assertEqual(serializer.data, expected)
|
|
|
|
def test_generic_fk(self):
|
|
"""
|
|
Test a relationship that spans a GenericForeignKey field.
|
|
IE. A forward generic relationship.
|
|
"""
|
|
|
|
class TagSerializer(serializers.ModelSerializer):
|
|
tagged_item = serializers.StringRelatedField()
|
|
|
|
class Meta:
|
|
model = Tag
|
|
fields = ('tag', 'tagged_item')
|
|
|
|
serializer = TagSerializer(Tag.objects.all(), many=True)
|
|
expected = [
|
|
{
|
|
'tag': 'django',
|
|
'tagged_item': 'Bookmark: https://www.djangoproject.com/'
|
|
},
|
|
{
|
|
'tag': 'python',
|
|
'tagged_item': 'Bookmark: https://www.djangoproject.com/'
|
|
},
|
|
{
|
|
'tag': 'reminder',
|
|
'tagged_item': 'Note: Remember the milk'
|
|
}
|
|
]
|
|
self.assertEqual(serializer.data, expected)
|