django 在 post/put 中休息嵌套关系

Question

我是 Django rest api 开发的新手。我有两个模型，一个是类别，另一个是子类别。
这是我的模型

class Category(models.Model):
    title = models.Charfield()
    brief = models.TextField()
    subcategories = model.ManyToManyField('Subcategory', blank=True)    

我的序列化器类

class CategorySerializer(serializers.ModelSerializer):
    title= serializer.Charfield()
    subcategories = Relatedfield(many=True)

现在看来

def post(self, request, format = None):
    data=request.DATA
    serialize= CategorySerializer(data=request.DATA)
    if serializer.valid():
        serializer.save()

如何保存嵌套数据，如 {'title':"test",'subscategories':[{'description':'bla bla bla'},{'description':'test test'}]}在post方法中。

我已经在文档中阅读了这个

Note: Nested serializers are only suitable for read-only representations, as there are cases where they would have ambiguous or non-obvious behavior if used when updating instances. For read-write representations you should always use a flat representation, by using one of the RelatedField subclasses.

请让我建议在 django rest 中进行嵌套关系发布/放入的正确方法或解决方案。

Answer 1

您是否尝试过创建 SubCategorySerializer并将其添加为 CategorySerializer 上的字段?

class SubcategorySerializer(serializers.ModelSerializer):
    class Meta:
        model = Subcategory

class CategorySerializer(serializers.ModelSerializer):
    subcategories = SubcategorySerializer(many=True)

文档: http://django-rest-framework.org/api-guide/relations.html#nested-relationships