是否可以在django

本文介绍了是否可以在django-rest-framework序列化程序中动态更改字段名称?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

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