Improved filter count API

apps/api/urls.py

@@ -11,5 +11,5 @@ urlpatterns = [
     path("api-token-auth/", obtain_auth_token),
 
     path("tickets/", views.TicketListApiView.as_view(), name="tickets"),
-    path("filter-counts/", views.FilterCountApiView.as_view(), name="filter-counts"),
+    path("filter-counts/", views.FilterCountListApiView.as_view(), name="filter-counts"),
 ]

apps/api/views.py

@@ -57,32 +57,23 @@ class TicketListApiView(generics.ListAPIView):
         return queryset
 
 
-class FilterCountApiView(APIView):
+class FilterCountListApiView(generics.ListAPIView):
+    authentication_classes = [SessionAuthentication, TokenAuthentication]
     permission_classes = [permissions.IsAuthenticated]
 
-    @method_decorator(cache_page(60 * 5))
     def get(self, request):
+        self._tickets = Ticket.objects.all()
+        data = {"tickets": self._tickets.count()}
 
-        priorities = TicketPriority.objects.all()
-        tags = TicketTag.objects.all()
-        departments = Department.objects.all()
+        self._fill_data(TicketPriority, data, "priority")
+        self._fill_data(TicketTag, data, "tags")
+        self._fill_data(Department, data, "department", model_key="author__department")
 
-        tickets = Ticket.objects.all()
+        return Response(data, status.HTTP_200_OK)
 
-        data = {
-            "priority_counts": {},
-            "tag_counts": {},
-            "department_counts": {},
-            "ticket_count": tickets.count()
-        }
 
-        for priority in priorities:
-            data["priority_counts"][str(priority.uuid)] = tickets.filter(priority=priority).count()
-
-        for tag in tags:
-            data["tag_counts"][str(tag.uuid)] = tickets.filter(tags__in=[tag]).count()
-
-        for department in departments:
-            data["department_counts"][str(department.uuid)] = tickets.filter(author__department=department).count()
-
-        return Response(data, status=status.HTTP_200_OK)
+    def _fill_data(self, model, data: dict, key: str, *, model_key:str=None):
+        data[key] = {}  # prevent KeyError
+        objects = model.objects.all()
+        for obj in objects:
+            data[key][str(obj.uuid)] = self._tickets.filter(**{model_key or key: obj}).count()