Django休息框架序列化到多个字段 [英] Django rest framework serializing many to many field

问题描述

如何将多对多的字段序列化成某些东西，并通过休息框架返回？在下面的示例中，我尝试返回一个与之相关的标签列表。

How do I serialize a many-to-many field into list of something, and return them through rest framework? In my example below, I try to return the post together with a list of tags associated with it.

models.py

class post(models.Model):
    tag = models.ManyToManyField(Tag)
    text = models.CharField(max_length=100)

serializers.py

class PostSerializer(serializers.ModelSerializer):
    class Meta:
        model = Post
        fields = ("text", "tag"??)

views.py

class PostViewSet(viewsets.ReadOnlyModelViewSet):
    queryset = Post.objects.all()
    serializer_class = PostSerializer

推荐答案

您将需要一个 TagSerializer ，其类Meta 具有 model = Tag 。创建 TagSerializer 后，使用 many = True PostSerializer >一个 ManyToManyField 关系：

You will need a TagSerializer, whose class Meta has model = Tag. After TagSerializer is created, modify the PostSerializer with many=True for a ManyToManyField relation:

class PostSerializer(serializers.ModelSerializer):
    tag = TagSerializer(read_only=True, many=True)

    class Meta:
        ...

答案适用于DRF 3

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