DRF：基于param获取返回对象的方法

Question

我正在学习Django，并尝试构建一个基于URL中给定的参数返回对象的端点。你知道吗

目前我有以下网址：

/api/v1/作为根返回：

GET /api/v1/

HTTP 200 OK
Allow: GET, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
    "device-groups": "http://127.0.0.1:8000/api/v1/device-groups/"
}

/api/v1/device-groups/返回所有设备组：

HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

[
    {
        "device_group_name": "Default",
        "group_uuid": "7465febe-7c46-4420-85a1-73dfe0af812c",
        "color": "4286f4",
        "is_default": true,
        "customer": {
            "customer_name": "Customer1",
            "customer_uuid": "b3eb5d7d-d1a8-4997-a65b-28bed71b7cc6"
        }
    },
    {
        "device_group_name": "Default",
        "group_uuid": "e12d02d0-7916-477e-b318-9680a38617db",
        "color": "4286f4",
        "is_default": true,
        "customer": {
            "customer_name": "Another customer",
            "customer_uuid": "5b5dafab-c311-4f58-80f5-c50d77fcf8a5"
        }
    },
    {
        "device_group_name": "group of customer1",
        "group_uuid": "c72e87b1-e7c8-4dcd-a9c7-4f6a016d7676",
        "color": "#ffffff",
        "is_default": false,
        "customer": {
            "customer_name": "Customer1",
            "customer_uuid": "b3eb5d7d-d1a8-4997-a65b-28bed71b7cc6"
        }
    }
]

我想要一个像/api/v1/device-groups/<customer_uuid>/这样的端点，它返回与给定客户uuid相关的设备组。你知道吗

我的serializers.py：

class CustomerSerializer(serializers.HyperlinkedModelSerializer):
    class Meta:
        model = Customer
        fields = ('customer_name', 'customer_uuid')


class DeviceGroupSerializer(serializers.HyperlinkedModelSerializer):
    customer = CustomerSerializer(many=False, read_only=True)

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

我的views.py：

class DeviceGroupViewSet(viewsets.ModelViewSet):
    serializer_class = DeviceGroupSerializer
    queryset = DeviceGroup.objects.all()

我的urls.py：

router = routers.DefaultRouter()
router.register(r'device-groups', views.DeviceGroupViewSet)


urlpatterns = [
   path('admin/', admin.site.urls),
   path('api/v1/', include(router.urls)),
]

我试着像这样覆盖get_queryset：

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

但结果是：AssertionError: basename argument not specified, and could not automatically determine the name from the viewset, as it does not have a .queryset attribute.

我需要改变什么才能得到一个/api/v1/device-groups/<customer_uuid>/端点，它只显示与给定客户uuid相关的设备组？你知道吗

编辑

Internal Server Error: /api/v1/device-groups/
Traceback (most recent call last):
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\django\utils\datastructures.py", line 77, in __getitem__
list_ = super().__getitem__(key)
KeyError: 'customer'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\django\core\handlers\exception.py", line 34, in inner
response = get_response(request)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\django\core\handlers\base.py", line 126, in _get_response
response = self.process_exception_by_middleware(e, request)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\django\core\handlers\base.py", line 124, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\django\views\decorators\csrf.py", line 54, in wrapped_view
return view_func(*args, **kwargs)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\rest_framework\viewsets.py", line 116, in view
return self.dispatch(request, *args, **kwargs)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\rest_framework\views.py", line 495, in dispatch
response = self.handle_exception(exc)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\rest_framework\views.py", line 455, in handle_exception
self.raise_uncaught_exception(exc)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\rest_framework\views.py", line 492, in dispatch
response = handler(request, *args, **kwargs)
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\rest_framework\mixins.py", line 40, in list
queryset = self.filter_queryset(self.get_queryset())
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\app\core\views.py", line 
13, in get_queryset
customer = self.request.GET['customer']
File "C:\Users\Stevy\PycharmProjects\tapartisan-api\env\lib\site- 
packages\django\utils\datastructures.py", line 79, in __getitem__
raise MultiValueDictKeyError(key)
django.utils.datastructures.MultiValueDictKeyError: 'customer'`

Answer 1

路由器无法确定basename。您必须在路由器中定义basename。像这样

router.register(r'device-groups', views.DeviceGroupViewSet, base_name='device-groups')

base_name实际上用于生成路由/URL的名称。您可以阅读更多关于它的信息here。你知道吗