get_queryset不適用於drf RetrieveUpdateDestroyAPIView

Question

我想在RetrieveUpdateDestroyAPIView中對原始sql查詢使用get_queryset函數。這與ListCreateAPIView（）工作正常。我是drf的新手。所以，請解釋一下是否有什麼事情做錯了。

views.py

class SubnetGatewayDevice(generics.ListCreateAPIView): 

    serializer_class = SubnetDeviceSerializer 

    def get_queryset(self): 
     sql_query = " select sd.hostname,sd.ma_number,sd.datacenter_id, ssd.ip, ssp.subnet_id, " \ 
        " sd.id, ssd.id, ssp.id from subnets_device sd" \ 
        " inner join subnets_subnetdevice as ssd on sd.id = ssd.device_id" \ 
        " inner join subnets_subnetphysical as ssp on ssd.subnet_physical_id = ssp.id" 
     return list(Device.objects.raw(sql_query)) 


    def perform_create(self, serializer): 
     serializer.save(data=self.request.data) 


class SubnetGatewayDeviceDetail(generics.RetrieveUpdateDestroyAPIView): 
    # parser_classes = (JSONParser,) 

    serializer_class = SubnetDeviceSerializer 

    def get_queryset(self): 
     device_id = "5" 
     sql_query = " select sd.hostname as hostname,sd.ma_number,sd.datacenter_id, ssd.ip, ssp.subnet_id, " \ 
        " sd.id, ssd.id, ssp.id from subnets_device sd" \ 
        " inner join subnets_subnetdevice as ssd on sd.id = ssd.device_id" \ 
        " inner join subnets_subnetphysical as ssp on ssd.subnet_physical_id = ssp.id " \ 
        " where sd.id = "+device_id 
     return Device.objects.raw(sql_query) 



    # def perform_create(self, serializer): 
    #  serializer.save(data=self.request.data) 

Serializer.py

class SubnetDeviceSerializer(serializers.ModelSerializer): 
    subnet_id = serializers.IntegerField(required=True) 
    datacenter_id = serializers.IntegerField(required=True) 
    ip = serializers.IPAddressField(protocol='both') 

    class Meta: 
     model = Device 
     fields = ('id','hostname','ma_number','subnet_id','datacenter_id','ip') 

    def create(self, validated_data): 
     subnet_id = validated_data['subnet_id'] 
     ma_number = validated_data['ma_number'] 
     hostname = validated_data['hostname'] 
     data_center_id = validated_data['datacenter_id'] 
     gateway_ip= validated_data['ip'] 


     subnet_physical = SubnetPhysical.objects.get(subnet_id=subnet_id) 
     if subnet_physical: 
      subnet_physical_id = subnet_physical.id 

      device_obj = Device() 
      device_obj.hostname = hostname 
      device_obj.ma_number = ma_number 
      device_obj.datacenter_id = data_center_id 
      device_obj.save() 
      device_pk = device_obj.id 

      subnet_device_obj = SubnetDevice() 
      subnet_device_obj.ip = gateway_ip 
      subnet_device_obj.device_id = device_pk 
      subnet_device_obj.subnet_physical_id = subnet_physical_id 
      subnet_device_obj.save() 

     return device_pk 

Answer 1

您可能需要重寫get_object()方法，如果你需要。

RetrieveUpdateDestroyAPIView在單個實例上執行操作。您可能會試着評估一下，您真正​​需要達到的目標以及如何更恰當地完成。