Django序列化器输出作为JSON对象的一部分

语境

我有2个模型：Customer＆DeviceGroup。

目前，我有一个API端点/api/v1/device-groups/?customer_uuid=<customer_uuid>，它返回DeviceGroups与给定相关的，Customer如下所示：

[
    {
        "group_uuid": "c61361ac-0826-41bb-825a-8aa8e014ae0c",
        "device_group_name": "Default",
        "color": "0a2f45",
        "is_default": true
    },
    {
        "group_uuid": "1a86e8e4-b41b-4f33-aefb-ce984ef96144",
        "device_group_name": "Testgroup",
        "color": "123456",
        "is_default": false
    }
] 

目标

我希望数组成为DeviceGroups这样的对象的一部分：

"device_groups": 
[
    {
        "group_uuid": "c61361ac-0826-41bb-825a-8aa8e014ae0c",
        "device_group_name": "Default",
        "color": "0a2f45",
        "is_default": true
    },
    {
        "group_uuid": "1a86e8e4-b41b-4f33-aefb-ce984ef96144",
        "device_group_name": "Testgroup",
        "color": "123456",
        "is_default": false
    }
] 

楷模

# models.py

class Customer(models.Model):
    customer_uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False, db_index=True)
    customer_name = models.CharField(max_length=128, unique=True)


class DeviceGroup(models.Model):
    group_uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False, db_index=True)
    customer_uuid = models.ForeignKey(Customer, on_delete=models.DO_NOTHING)
    device_group_name = models.CharField(max_length=20)
    color = models.CharField(max_length=10)
    is_default = models.BooleanField(default=False)

序列化器

# serializers.py

class DeviceGroupSerializer(serializers.ModelSerializer):
    class Meta:
        model = DeviceGroup
        fields = ('group_uuid', 'device_group_name', 'color', 'is_default')

视图

# views.py

class DeviceGroupCustomerViewSet(viewsets.ModelViewSet):
    serializer_class = DeviceGroupSerializer

    def get_queryset(self):
        return DeviceGroup.objects.filter(customer_uuid=self.request.GET['customer_uuid'])

我尝试创建一个新的，serializer但不能解决我的问题：

class TestSerializer(serializers.ModelSerializer):
    device_groups = DeviceGroupSerializer(many=True, read_only=True)

    class Meta:
        model = DeviceGroup
        fields = ('device_groups', 'group_uuid', 'device_group_name', 'color', 'is_default')

为了获得所需的输出，我需要更改什么？