Modified Application, Endpoint and Service retrieve method

api/viewsets/applications.py

@@ -94,20 +94,20 @@ class ApplicationViewSet(viewsets.ModelViewSet):
     def retrieve(self, request, *args, **kwargs):
         try:
             id = self.kwargs['pk']
-            queryset = Application.objects.filter(id=id)
-            serializer = self.get_serializer(queryset, many=True)
+            instance = Application.objects.get(id=id)           
+            serializer = self.get_serializer(instance)
             
-            if not queryset.exists():
-                message = status_message_response(404, 'failed',
-                                                  'No record found', [])
-                return Response(message, status=status.HTTP_404_NOT_FOUND)
-            else:
             message = status_message_response(
                             200, 'success',
                             'Application retrieved', serializer.data
                           )
             return Response(message, status=status.HTTP_200_OK)
 
+        except Application.DoesNotExist:
+            message = status_message_response(404, 'failed',
+                                              'No record found', [])
+            return Response(message, status=status.HTTP_404_NOT_FOUND)
+
         except Exception as e:
             message = status_message_response(
                             500, 'failed', 

api/viewsets/endpoints.py

@@ -80,21 +80,20 @@ class APIEndpointViewSet(viewsets.ModelViewSet):
     def retrieve(self, request, *args, **kwargs):
         try:
             id = self.kwargs['pk']
-            queryset = APIEndpoint.objects.filter(id=id)
-            serializer = self.get_serializer(queryset, many=True)
+            instance = APIEndpoint.objects.get(id=id)           
+            serializer = self.get_serializer(instance)
             
-            if not queryset.exists():
-                message = status_message_response(
-                                404, 'failed', 'No record found', []
-                            )
-                return Response(message, status=status.HTTP_404_NOT_FOUND)
-            else:
             message = status_message_response(
                             200, 'success',
                             'Endpoint retrieved', serializer.data
                           )
             return Response(message, status=status.HTTP_200_OK)
 
+        except APIEndpoint.DoesNotExist:
+            message = status_message_response(404, 'failed',
+                                              'No record found', [])
+            return Response(message, status=status.HTTP_404_NOT_FOUND)
+
         except Exception as e:
             message = status_message_response(
                             500, 'failed', 

api/viewsets/services.py

@@ -76,21 +76,20 @@ class APIServiceViewSet(viewsets.ModelViewSet):
     def retrieve(self, request, *args, **kwargs):
         try:
             id = self.kwargs['pk']
-            queryset = APIService.objects.filter(id=id)
-            serializer = self.get_serializer(queryset, many=True)
+            instance = APIService.objects.get(id=id)           
+            serializer = self.get_serializer(instance)
             
-            if not queryset.exists():
-                message = status_message_response(
-                                404, 'failed', 'No record found', []
-                            )
-                return Response(message, status=status.HTTP_404_NOT_FOUND)
-            else:
             message = status_message_response(
                             200, 'success',
                             'Service retrieved', serializer.data
                           )
             return Response(message, status=status.HTTP_200_OK)
 
+        except APIService.DoesNotExist:
+            message = status_message_response(404, 'failed',
+                                              'No record found', [])
+            return Response(message, status=status.HTTP_404_NOT_FOUND)
+
         except Exception as e:
             message = status_message_response(
                             500, 'failed',