我正在使用DRF，并尝试在映射表中搜索精确匹配项，以便我可以更新该记录。
我有下表：
site
- id
- location
- address
circuit
- id
- name
- ref
sitecircuits
- site_id
- circuit_id
- active_link
我当前的DRF配置如下：
视图
class MonitoringConnectivitySet(viewsets.ModelViewSet):
queryset = SiteCircuits.objects.all()
serializer_class = MonitoringSerializerConnectivity
permission_classes = (IsAdminUser,)
filter_class = SiteCircuits
filter_backends = (filters.SearchFilter,)
search_fields = ('site__id','circuit__id')
序列化器
class MonitoringSerializerConnectivity(serializers.ModelSerializer):
class Meta:
model = SiteCircuits
fields = ('site_id','circuit_id','active_link',)
url
router.register(r'conn_set', views.MonitoringConnectivitySet)
此网址http://localhost:8100/api/conn_set/?site__id=8&circuit__id=7 返回所有结果（因为我根本不搜索）
ive也尝试使用以下内容
URL：
path('conn_set/<int:site_id>/<int:circuit_id>/', views.MonitoringConnectivitySet)
序列化器：
class MonitoringSerializerConnectivity(serializers.ModelSerializer):
class Meta:
model = SiteCircuits
fields = ('site_id','circuit_id','active_link',)
def get_queryset(self):
site_id = self.kwargs['site_id']
circuit_id = self.kwargs['circuit_id']
return SiteCircuits.objects.filter(site_id=site_id,circuit_id=circuit_id)
视图：
class MonitoringConnectivitySet(viewsets.ModelViewSet):
queryset = SiteCircuits.objects.all()
serializer_class = MonitoringSerializerConnectivity
permission_classes = (IsAdminUser,)
在使用url时也会失败（表明它仅使用一个值而不是两个值） http://localhost:8100/api/conn_set/8/7
有人知道这里合适的组合吗？过滤和更新映射表是否需要做任何特殊的事情？
谢谢
编辑
当重写QuerySet时，出现以下错误：
Traceback:
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
34. response = get_response(request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
115. response = self.process_exception_by_middleware(e, request)
File "/usr/local/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
113. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/local/lib/python3.6/site-packages/django/views/decorators/csrf.py" in wrapped_view
54. return view_func(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/rest_framework/viewsets.py" in view
116. return self.dispatch(request, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py" in dispatch
495. response = self.handle_exception(exc)
File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py" in handle_exception
455. self.raise_uncaught_exception(exc)
File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py" in raise_uncaught_exception
466. raise exc
File "/usr/local/lib/python3.6/site-packages/rest_framework/views.py" in dispatch
492. response = handler(request, *args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/rest_framework/mixins.py" in list
40. queryset = self.filter_queryset(self.get_queryset())
File "/usr/local/lib/python3.6/site-packages/rest_framework/generics.py" in filter_queryset
152. queryset = backend().filter_queryset(self.request, queryset, self)
File "/usr/local/lib/python3.6/site-packages/django_filters/rest_framework/backends.py" in filter_queryset
90. filterset = self.get_filterset(request, queryset, view)
File "/usr/local/lib/python3.6/site-packages/django_filters/rest_framework/backends.py" in get_filterset
36. return filterset_class(**kwargs)
File "/usr/local/lib/python3.6/site-packages/django/db/models/base.py" in __init__
501. raise TypeError("%s() got an unexpected keyword argument '%s'" % (cls.__name__, kwarg))
Exception Type: TypeError at /api/conn_set/
Exception Value: SiteCircuits() got an unexpected keyword argument 'data'
答案 0 :(得分：2)
我认为最简单的解决方案是像这样尝试（覆盖get_queryset方法）：
class MonitoringConnectivitySet(viewsets.ModelViewSet):
queryset = SiteCircuits.objects.all()
serializer_class = MonitoringSerializerConnectivity
permission_classes = (IsAdminUser,)
filter_class = SiteCircuits
def get_queryset(self):
qs = super(MonitoringConnectivitySet, self).get_queryset()
site = self.request.query_params.get('site')
circuit = self.request.query_params.get('circuit')
if site:
qs = qs.filter(site_id=site)
if circuit:
qs = qs.filter(circuit_id=circuit)
return qs
# Usage
http://localhost:8100/api/conn_set/?site=8&circuit=7
答案 1 :(得分：1)
您可以在这里使用django-filter。对于该安装，请按照django-filter installation instructions进行操作，并使用以下代码段。
from django_filters.rest_framework.backends import DjangoFilterBackend
class MonitoringConnectivitySet(viewsets.ModelViewSet):
queryset = SiteCircuits.objects.all()
serializer_class = MonitoringSerializerConnectivity
permission_classes = (IsAdminUser,)
filter_class = SiteCircuits
search_fields = ('site__id', 'circuit__id')
filter_backends = (filters.SearchFilter, DjangoFilterBackend)
filterset_fields = ('site__id', 'circuit__id')因此，您可以使用URL过滤出结果，
http://localhost:8100/api/conn_set/?site__id=8&circuit__id=7
答案 2 :(得分：0)
我已经在以下方面达到了我想要的结果：
url：
path('conn_set/<int:site_id>/<int:circuit_id>/', views.MonitoringConnectivitySet.as_view())
serialzier：
class MonitoringSerializerConnectivity(serializers.ModelSerializer):
class Meta:
model = SiteCircuits
fields = ('site_id','circuit_id','active_link',)
视图：
class MonitoringConnectivitySet(generics.GenericAPIView):
serializer_class = MonitoringSerializerConnectivity
permission_classes = (IsAdminUser,)
def get(self, request, *args, **kwargs):
site_id = kwargs.get('site_id', '0')
circuit_id = kwargs.get('circuit_id', '0')
instance = get_object_or_404(SiteCircuits, site_id=site_id, circuit_id=circuit_id)
serializer = self.get_serializer(instance)
return Response(serializer.data)
def put(self, request, *args, **kwargs):
site_id = kwargs.get('site_id', '0')
circuit_id = kwargs.get('circuit_id', '0')
instance = get_object_or_404(SiteCircuits, site_id=site_id, circuit_id=circuit_id)
serializer = MonitoringSerializerConnectivity(instance, data=request.data)
if serializer.is_valid():
serializer.save()
return Response(serializer.data,status=status.HTTP_200_OK)
return Response(serializer.errors,status=status.HTTP_400_BAD_REQUEST)