modify retrieve on change request template

app/applicationlayer/cms/template/header/views.py

@@ -89,10 +89,7 @@ class ChangeRequestTemplatesViewset(viewsets.ModelViewSet):
         )
 
     def retrieve(self, request, *args, **kwargs):
-        instance = self.queryset.filter(
-            template_no=str(self.kwargs.get('template_no'))
-        ).first()
-
+        instance = self.get_object()
         serializer = self.get_serializer(instance)
         return Response(serializer.data)