我有Product和ProductCategory模型.
假设我有ProductCategory TV,其中 Sony,Samsung作为其产品.我也有MobilePhone类别,其产品为Apple和Nokia. 使用DRF,我想使用序列化器获取JSON输出,如下所示:
Let's say I have ProductCategory TV, which has Sony, Samsung as its products. I also have MobilePhone category with Apple and Nokia as its products. Using DRF, I would like to get JSON output using serializers, which is similar to the below:
{ 'TV': [ 'Sony': { 'price': '$100', 'country': 'Japan', }, 'Samsung': { 'price': '$110', 'country': 'Korea', } ] 'mobile_phone': [ 'Apple': { 'price': '$300', 'country': 'USA', }, 'Nokia': { 'price': '$210', 'country': 'Finland', } ] }这里的问题是序列化程序中的字段名称('TV', 'mobile_phone')必须是动态的.
The problem here is that the field names('TV', 'mobile_phone') in serializer have to be dynamic.
我知道我可以获取以下JSON类型
I know I can get the following JSON type
{ [ { 'product_category': 'TV', 'manufacturer: 'Sony', 'price': '$100', 'country': 'Japan', }, { 'product_category': 'TV', 'manufacturer: 'Samgsung', 'price': '$110', 'country': 'Korea', } ] [ { 'product_category': 'mobile_phone', 'manufacturer: 'Samgsung', 'price': '$300', 'country': 'USA', }, { 'product_category': 'mobile_phone', 'manufacturer: 'Apple', 'price': '$210', 'country': 'Finland', } ] }使用
class CategorySerializer(serializers.Serializer): product_category = serializer.CharField() manufacturer = serializer.CharField() price = serializer.CharField() country = serializer.CharField()但是,动态更改字段名称很难实现.有什么办法可以做到吗?
But the dynamically-changing-field-names is difficult to achieve. Is there any way I can do this?
推荐答案您可以通过覆盖序列化程序和默认ListSerializer的to_representation :
You can support this kind of custom format by overriding to_representation of your Serializer and of the default ListSerializer:
首先,您覆盖序列化程序的to_representation :
First, you override to_representation of your serializer: class CategorySerializer(serializers.Serializer): # your fields here def to_representation(self, obj): return { obj.manufacturer: { 'price': obj.price, 'country': obj.country } }
这样您的序列化类别就是这种形式:
So that your serialized categories are of this form:
{ 'Sony': { 'price': '$100', 'country': 'Japan' } }
然后将product_category放在列表的前面,您可以使用自定义ListSerializer 和自定义to_representation:
Then to prepend the product_category in front of your list, you can use a custom ListSerializer with a custom to_representation:
class CategoryListSerializer(serializers.ListSerializer): def to_representation(self, data): # Group your data entries by category here ... return { 'TV': tv_data 'mobile_phone': mobile_data } class CategorySerializer(serializers.Serializer): ... class Meta: list_serializer_class = CategoryListSerializer
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是否可以在django
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