Question

以下是我的序列化程序类。我在一个模型中有所有字段。我想以自定义格式更改序列化数据的表示。试过序列化器的to_representation方法，但无法成功。

class MyListSerilizer(ModelSerializer):
  class Meta:
    model=MyModel
    fields=['Name','Address_ID','Portal','Address','City','DisplayOrderDateTime','Email','Order_ID','Order_Code','Item_Code','DispatchedOn','Payment_Mode','Shipping_Charge','ShippingMethodCode','ShippingMethodCharges','CashOnDeliveryCharges','CurrencyCode','BillingAddress','GiftWrapCharges','SaleOrderItemCode','Shipping_ref','Cancellable','OnHold','Quantity','Invoice_No''Portal',........]

所以在我的视图中定义了类，并且在这里也提到了与它们对应的输出。

   class MyListAPIView(ListAPIView):
      def list(self,request):
          queryset=MyModel.objects.all()
          serializer=MyListSerilizer(queryset,many=True)
          return Response({'Records':serializer.data})

输出：----------＆gt;对应于视图

  "Records": [
    {
        "Name": "abc",
        "Address_ID": "6819319",
        "Portal": "amksl",
        "Address": "",
        "City": "absjsls",
        "DisplayOrderDateTime": null,
        "Email": "abcd@gmail.com",
        "Order_ID": "",
        "Order_Code": "",
        "Item_Code": "",
        "DispatchedOn": "",
        "Payment_Mode": ""
     },
      {
         "Name": "abc",
        "Address_ID": "6819319",
        "Portal": "amksl",
        "Address": "",
        "City": "absjsls",
        "DisplayOrderDateTime": null,
        "Email": "abcd@gmail.com",
        "Order_ID": "",
        "Order_Code": "",
        "Item_Code": "",
        "DispatchedOn": "",
        "Payment_Mode": ""
     },
      so on....

所以我的问题是如何实现这种json格式。简而言之，我如何自定义我的视图类

     {
      "identifiers":{
                "email":"abcd@gmai.com",
                "phone":"123664"
              },
"activity_type": "purchase",
"timestamp": "UNIX TIMESTAMP",                
"products": [{
                "brandName": "abc",
                "id": "1",                                  
                "sku": "abcd",                                
                "name": "mnis",                           
                "price": 12.9,
                "discount": "",
                "quantity": "",
                "currency": ""
                 }]
"cart_info":{
                "total":"",
                "revenue":"",
                "currency":""
            },
"Order_info":{
               "total":"2121",
                .
                .
                .
             }
  },
   {
      "identifiers":{
                "email":"abcd@gmai.com",
                "phone":"123664"
              },
"activity_type": "purchase",
"timestamp": "UNIX TIMESTAMP",                
"products": [{
                "brandName": "abc",
                "id": "1",                                  
                "sku": "abcd",                                
                "name": "mnis",                           
                "price": 12.9,
                "discount": "",
                "quantity": "",
                "currency": ""
                 }]
"cart_info":{
                "total":"",
                "revenue":"",...so on

Answer 1

覆盖序列化程序类

中的 to_representation 方法

class MyListSerilizer(ModelSerializer):

     class Meta:
        model=MyModel
        fields=['Name','Address_ID','Portal','Address','City','DisplayOrderDateTime','Email','Order_ID','Order_Code','Item_Code','DispatchedOn','Payment_Mode','Shipping_Charge','ShippingMethodCode','ShippingMethodCharges','CashOnDeliveryCharges','CurrencyCode','BillingAddress','GiftWrapCharges','SaleOrderItemCode','Shipping_ref','Cancellable','OnHold','Quantity','Invoice_No''Portal',........]


     def to_representation(self, instance):
         # instance is the model object. create the custom json format by accessing instance attributes normaly and return it


        identifiers = dict()
        identifiers['email'] = instance.Email
        identifiers['phone'] = instance.phone

        representation = {
            'identifiers': identifiers,
            'activity_type': instance.xxxx,
            'timestamp': instance.xxxxx,
            .
            .
            .  -> your custom data
         } 

     return representation

无论何时调用serializer.data，都会返回此表示字典

Answer 2

DRF中有一种名为to_representation的方法。参考：http://www.django-rest-framework.org/api-guide/fields/

在django rest框架中自定义Json Response

2 个答案: