私には2つのリソース（Tastypie）があり、そのうちの1つにはToManyFieldフィールドがあります。
class SongResource(ModelResource):
class Meta:
queryset = Song.objects.all()
resource_name = 'song'
authorization = Authorization()
class AlbumResource(ModelResource):
songs = fields.ToManyField('core.api.SongResource', 'songs', full=True)
class Meta:
queryset = Album.objects.all()
resource_name = 'album'
authorization = Authorization()
したがって、PlaylistResourceにアクセスすると、次のように表示されます。
http://127.0.0.1:8000/api/v1/playlist/1/?format=jsonこれが私が得る応答です：
{
"created_in": "2012-06-24T22:57:01+00:00",
"id": "1",
"number_of_plays": 0,
"playlist_slug": "my-first-playlist",
"playlist_title": "my first playlist",
"resource_uri": "/api/v1/playlist/1/",
"songs": [{
"genre": "Progressive metal",
"id": "2",
"length": "04:19",
"number_of_plays": 0,
"price": 0.0,
"resource_uri": "/api/v1/song/2/",
"song_slug": "leyla-2008",
"song_title": "Leyla",
"song_url": "http://www.amazon.s3.com/prologue",
"thumbnail": "http://almacosta.files.wordpress.com/2011/05/bob_marley.jpg?w=250",
"year": 2008
}, {
"genre": "Progressive metal",
"id": "3",
"length": "3.26",
"number_of_plays": 0,
"price": 0.0,
"resource_uri": "/api/v1/song/3/",
"song_slug": "yazamadim-2008",
"song_title": "Yazamadim",
"song_url": "http://www.amazon.s3.com/prologue",
"thumbnail": "http://img72.imageshack.us/img72/3215/14so8.jpg",
"year": 2008
}]
}
各曲のアルバムやアーティストにアクセスしたいので、追加しました
album = fields.ForeignKey('core.api.AlbumResource','album')
私には、SongResourceしかし私はこのエラーが発生します
{
"error_message": "'Song' object has no attribute 'album'",
"traceback": "Traceback (most recent call last):\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/resources.py\", line 192, in wrapper\n response = callback(request, *args, **kwargs)\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/resources.py\", line 406, in dispatch_detail\n return self.dispatch('detail', request, **kwargs)\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/resources.py\", line 427, in dispatch\n response = method(request, **kwargs)\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/resources.py\", line 1058, in get_detail\n bundle = self.full_dehydrate(bundle)\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/resources.py\", line 654, in full_dehydrate\n bundle.data[field_name] = field_object.dehydrate(bundle)\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/fields.py\", line 709, in dehydrate\n m2m_dehydrated.append(self.dehydrate_related(m2m_bundle, m2m_resource))\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/fields.py\", line 514, in dehydrate_related\n return related_resource.full_dehydrate(bundle)\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/resources.py\", line 654, in full_dehydrate\n bundle.data[field_name] = field_object.dehydrate(bundle)\n\n File \"/usr/local/lib/python2.7/dist-packages/tastypie/fields.py\", line 621, in dehydrate\n foreign_obj = getattr(bundle.obj, self.attribute)\n\nAttributeError: 'Song' object has no attribute 'album'\n"
}
リバースデータを取得できるトリックはありますか？
編集 これが私の曲とアルバムのモデルです（models.pyファイルと同じ順序です）
class Song(models.Model):
song_title = models.CharField(max_length=140)
length = models.CharField(max_length=5, blank=True, null = True)
genre = models.CharField(max_length=100, blank = True, null = True)
year = models.IntegerField(blank = True, null = True)
thumbnail = models.URLField(default = '/media/thumbnail.png')
song_url = models.URLField()
number_of_plays = models.IntegerField(verbose_name='Number of plays')
price = models.FloatField(default = 0.0)
song_slug = models.SlugField(unique=True, max_length=200)
def __unicode__(self):
return self.song_title
class Album(models.Model):
album_title = models.CharField(max_length=140)
release_year = models.IntegerField('Release Year')
price = models.FloatField(default=0.0)
album_slug = models.SlugField(unique=True)
songs = models.ManyToManyField(Song)
def __unicode__(self):
return self.album_title
def get_absolute_url(self):
return '/album/%s' % self.album_slug