Python 如何从Django rest框架的序列化程序中获取特定字段

在Inside Views.py中，我有以下代码：

class ServerViewSet(viewsets.ViewSet):

def list(self, request):
    servers = Server.objects.all()
    serializer = ServerSerializer(servers, many=True) 
    return Response(serializer.data) # In here, I want to get the server name only

def retrieve(self, request, pk=None):
    servers = get_object_or_404(Server, pk=pk)
    serializer = ServerSerializer(servers)
    return Response(serializer.data) # In here, I want to get the server name and ip address

class ServerSerializer(serializers.HyperlinkedModelSerializer):
   class Meta:
        model = Server
        # fields = '__all__'
        fields = ('id', 'name', 'desc', 'ip_address')

在serializers.py中，我有以下代码：

class ServerViewSet(viewsets.ViewSet):

def list(self, request):
    servers = Server.objects.all()
    serializer = ServerSerializer(servers, many=True) 
    return Response(serializer.data) # In here, I want to get the server name only

def retrieve(self, request, pk=None):
    servers = get_object_or_404(Server, pk=pk)
    serializer = ServerSerializer(servers)
    return Response(serializer.data) # In here, I want to get the server name and ip address

class ServerSerializer(serializers.HyperlinkedModelSerializer):
   class Meta:
        model = Server
        # fields = '__all__'
        fields = ('id', 'name', 'desc', 'ip_address')

是否有官方方法从serializers.data中筛选出特定字段

带有父类的示例

class CommonSerializer(serializers.ModelSerializer):
def get_field_names(self, *args, **kwargs):
    field_names = self.context.get('fields', None)
    if field_names:
        return field_names
    return super(self).get_field_names(*args, **kwargs)

class ServerSerializer(CommonSerializer):
      class Meta:
        ..............

class WebsiteSerializer(CommonSerializer):
   class Meta:
        ..............

覆盖序列化程序中的get_字段名称：

class ServerSerializer(serializers.HyperlinkedModelSerializer):
    def get_field_names(self, *args, **kwargs):
        field_names = self.context.get('fields', None)
        if field_names:
            return field_names

        return super(ServerSerializer, self).get_field_names(*args, **kwargs)

然后像这样使用它：

serializer = ServerSerializer(servers, context={'fields': ['name']})

serializer = ServerSerializer(servers, context={'fields': ['name', 'ip_address']})

*编辑*

将其转换为mixin，以使其更易于重用：

class FieldMixin(object):
    def get_field_names(self, *args, **kwargs):
        field_names = self.context.get('fields', None)
        if field_names:
            return field_names

        return super(FieldMixin, self).get_field_names(*args, **kwargs)

并使用它：

class ServerSerializer(FieldMixin, serializers.HyperlinkedModelSerializer):

覆盖序列化程序中的get_字段名称：

class ServerSerializer(serializers.HyperlinkedModelSerializer):
    def get_field_names(self, *args, **kwargs):
        field_names = self.context.get('fields', None)
        if field_names:
            return field_names

        return super(ServerSerializer, self).get_field_names(*args, **kwargs)

然后像这样使用它：

serializer = ServerSerializer(servers, context={'fields': ['name']})

serializer = ServerSerializer(servers, context={'fields': ['name', 'ip_address']})

*编辑*

将其转换为mixin，以使其更易于重用：

class FieldMixin(object):
    def get_field_names(self, *args, **kwargs):
        field_names = self.context.get('fields', None)
        if field_names:
            return field_names

        return super(FieldMixin, self).get_field_names(*args, **kwargs)

并使用它：

class ServerSerializer(FieldMixin, serializers.HyperlinkedModelSerializer):

---

谢谢您的回答，但是当我没有将上下文作为参数传递时，错误提示超级参数1必须是type，而不是ServerSerializer，如果上下文没有，我如何显示所有字段passed@GaryNg也许可以尝试上下文而不是上下文。此属性应始终存在。我的意思是，如果我键入serializer=serializer=ServerSerializerservers，则返回superself。get_field_names*args，**kwargs将抛出异常作为上面的注释。使用superServerSerializer，self而不是superself。是的，如果我将其添加到ServerSerializer类中，我要做的是为这类序列化程序实现父类，你能告诉我怎么做吗？谢谢你的回答，但当我不将上下文作为参数传递时，错误提示超级参数1必须是type，而不是ServerSerializer，如果上下文没有显示，如何显示所有字段passed@GaryNg也许可以尝试上下文而不是上下文。此属性应始终存在。我的意思是，如果我键入serializer=serializer=ServerSerializerservers，则返回superself。get_field_names*args，**kwargs将抛出异常作为上面的注释。使用superServerSerializer，self而不是superself。是的，如果我将其添加到ServerSerializer类中，我尝试做的是为这种序列化程序实现父类，您介意告诉我如何做吗？