如何将两个相似的视图合并成一个响应？

Question

我有两个类似的视图，它们返回相同的序列化响应。这些视图像这样:

class GetFoos(generics.ListAPIView):
    # init stuff here

    def list(self, request):
        queryset = Foo.objects.filter(owner = request.user)
        serializer = FooSerializer(queryset, many = True)
        return Response(serializer.data, status = status.HTTP_200_OK)

class GetFooResponses(generics.ListAPIView):
    # init stuff here

    def list(self, request):
        queryset = FooResponse.objects.filter(owner = request.user)
        serializer = FooResponseSerializer(queryset, many = True)
        return Response(serializer.data, status = status.HTTP_200_OK)

而序列化器就像这样：

class FooSerializer(serializers.ModelSerializer):
    user = serializers.ProfileInfoSerializer(source = 'owner.userprofile', read_only = True)

    class Meta:
        model = Foo
        fields = ('id', 'name', 'user')

class FooResponseSerializer(serializers.ModelSerializer):
    id = serializers.ReadOnlyField(source = 'foo.id')
    name = serializers.ReadOnlyField(source = 'foo.name')
    user = serializers.ProfileInfoSerializer(source = 'owner.userprofile', read_only = True)

    class Meta:
        model = FooResponse
        fields = ('id', 'name', 'user')

最后，模型的外观如下：

class Foo(models.Model):
    owner = ForeignKey('auth.User', related_name = 'foos')
    name = models.CharField()

class FooResponse(models.Model):
    owner = ForeignKey('auth.User', related_name = 'responses')
    foo = ForeignKey(Foo, related_name = 'responses')

由于这两个视图和序列化器返回基本相同的数据（一个ID字段，一个名称字段和用户配置文件信息），并且使用相同的请求参数（当前用户），因此我想将这两个合并为一个。我该怎么做？最终，我希望序列化响应包含两个查询集的结果。

- manabreak

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我理解您的意思是要创建一个视图，该视图将返回序列化的AND Foo和FooResponse模型，对吗？ - Paul

@Paul 不完全是。我想获取所有用户是所有者的 Foo 对象，以及存在一个 FooResponse 对象且用户是所有者的所有 Foo 对象。 - manabreak

Answer 1

由于在您的情况下serializer.data将是字典列表，因此我建议将两个序列化器的结果连接起来以用于响应：

class GetFoosAndResponses(generics.ListAPIView):
    # init stuff here

    def list(self, request):
        foo_queryset = Foo.objects.filter(owner=request.user)
        foo_serializer = FooSerializer(foo_queryset, many=True)

        foo_response_queryset = FooResponse.objects.filter(owner=request.user)
        foo_response_serializer = FooResponseSerializer(foo_response_queryset, many=True)

        return Response(foo_serializer.data + foo_response_serializer.data, status=status.HTTP_200_OK)

这个有意义吗？:)

- dukebody

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哇，Python的简洁总是让我惊叹不已。这就像魔法一样好用！ - manabreak