如果您合理地设计响应格式,那么在Django REST Framework中您会发现事情变得更容易。
目前似乎有点模糊,但我建议如下:
{
"tweets": [
{"tweet_attr_A": value_1, ...}, // first tweet
{"tweet_attr_A": value_2, ...}, // second tweet
//etc
],
"articles": [
{"id": 1, ...}, // first article
{"id": 2, ...}, // second article
//etc
]
}
我们可以用三个序列化器来表达这一点,例如:
class TweetSerializer(serializers.ModelSerializer):
class Meta:
model = Tweet
class ArticleSerializer(serializers.ModelSerializer):
class Meta:
model = Article
class TimelineSerializer(serializers.Serializer):
tweets = TweetSerializer(many=True)
articles = ArticleSerializer(many=True)
http://www.django-rest-framework.org/api-guide/serializers/#dealing-with- nested-objects
然后,因为我们使用的模型不止一个,所以最简单的是定义自己的自定义视图集,而不是尝试将其塞入DRF神奇的ModelViewSet类型中。http://www.django-rest-framework.org/api- guide/viewsets/#example
首先,我们需要一个对象类型传递给我们的TimelineSerializer。它应该具有两个属性:tweets
和articles
from collections import namedtuple
Timeline = namedtuple('Timeline', ('tweets', 'articles'))
然后,我们将定义自定义视图集以获取推文和文章,实例化一个Timeline对象并返回TimelineSerializer数据:
class TimelineViewSet(viewsets.ViewSet):
"""
A simple ViewSet for listing the Tweets and Articles in your Timeline.
"""
def list(self, request):
timeline = Timeline(
tweets=Tweet.objects.all(),
articles=Article.objects.all(),
)
serializer = TimelineSerializer(timeline)
return Response(serializer.data)