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<p>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</p>
<p>目前我有以下网址:</p>
<p><code>/api/v1/</code>作为根返回:</p>
<pre><code>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/"
}
</code></pre>
<p><code>/api/v1/device-groups/</code>返回所有设备组:</p>
<pre><code>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"
}
}
]
</code></pre>
<p>我想要一个像<code>/api/v1/device-groups/<customer_uuid>/</code>这样的端点,它返回与给定客户uuid相关的设备组。你知道吗</p>
<p>我的<code>serializers.py</code>:</p>
<pre><code>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')
</code></pre>
<p>我的<code>views.py</code>:</p>
<pre><code>class DeviceGroupViewSet(viewsets.ModelViewSet):
serializer_class = DeviceGroupSerializer
queryset = DeviceGroup.objects.all()
</code></pre>
<p>我的<code>urls.py</code>:</p>
<pre><code>router = routers.DefaultRouter()
router.register(r'device-groups', views.DeviceGroupViewSet)
urlpatterns = [
path('admin/', admin.site.urls),
path('api/v1/', include(router.urls)),
]
</code></pre>
<p>我试着像这样覆盖<code>get_queryset</code>:</p>
<pre><code>def get_queryset(self):
customer = self.request.GET['customer']
queryset = DeviceGroup.objects.filter(customer=customer)
return queryset
</code></pre>
<p>但结果是:<code>AssertionError: basename argument not specified, and could not automatically determine the name from the viewset, as it does not have a .queryset attribute.</code></p>
<p>我需要改变什么才能得到一个<code>/api/v1/device-groups/<customer_uuid>/</code>端点,它只显示与给定客户uuid相关的设备组?你知道吗</p>
<p><strong>编辑</p>
<pre><code>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'`
</code></pre>