有没有办法对嵌套序列化器 _set
进行排序,例如按 pk
或 time-stamp
排序。
所以基本上按照 order_by('-timestamp')
或order_by('-pk')
.
Json 数据
{
"pk": 151,
"album_name": "Name",
"song_set": [
{
pk: 3,
timestamp: '5 seconds'
},
{
pk: 2,
timestamp: '10 seconds'
},
{
pk: 1,
timestamp: '15 seconds'
}
]
}
型号
class Album(models.Model):
album_name = models.CharField(max_length=100, blank=True)
class Song(models.Model):
album = models.ForeignKey('album.Album', default=1)
timestamp = models.DateTimeField(auto_now_add=True, auto_now=False)
序列化器
class SongListSerializer(HyperlinkedModelSerializer):
class Meta:
model = Song
fields = [
'pk',
'timestamp'
]
class AlbumSerializer(HyperlinkedModelSerializer):
song_set = SongListSerializer(many=True, read_only=True)
class Meta:
model = Album
fields = [
'pk',
'timestamp',
'song_set'
]
最佳答案
您可以使用 SerializerMethodField
并为此编写自定义方法。
class AlbumSerializer(HyperlinkedModelSerializer):
song_set = serializers.SerializerMethodField()
class Meta:
model = Album
fields = [
'pk',
'timestamp',
'song_set'
]
def get_song_set(self, instance):
songs = instance.song_set.all().order_by('-timestamp')
return SongListSerializer(songs, many=True).data
关于python - Django Rest-Framework 嵌套序列化器顺序,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/48247490/