blob: dcdd83298a0350d9640befa2ea44dbfdf65f3455 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
|
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 rest_framework import serializers
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()
content_object = GenericForeignKey('content_type', 'object_id')
def __unicode__(self):
return self.tag
class Bookmark(models.Model):
"""
A URL bookmark that may have multiple tags attached.
"""
url = models.URLField()
tags = GenericRelation(Tag)
class TestGenericRelations(TestCase):
def setUp(self):
self.bookmark = Bookmark.objects.create(url='https://www.djangoproject.com/')
Tag.objects.create(content_object=self.bookmark, tag='django')
Tag.objects.create(content_object=self.bookmark, tag='python')
def test_reverse_generic_relation(self):
"""
Test a relationship that spans a GenericRelation field.
"""
class BookmarkSerializer(serializers.ModelSerializer):
tags = serializers.ManyRelatedField(source='tags')
class Meta:
model = Bookmark
exclude = ('id',)
serializer = BookmarkSerializer(self.bookmark)
expected = {
'tags': [u'django', u'python'],
'url': u'https://www.djangoproject.com/'
}
self.assertEquals(serializer.data, expected)
|
