增加opl_cate返回

apps/opm/serializers.py

@@ -133,6 +133,7 @@ class OplCreateUpdateSerializer(CustomModelSerializer):
 
 
 class OplSerializer(CustomModelSerializer):
+    opl_cate_name = serializers.CharField(source='opl_cate.name', read_only=True)
     class Meta:
         model = Opl
         fields = '__all__'

apps/opm/views.py

@@ -44,6 +44,7 @@ class OplViewSet(CustomModelViewSet):
     create_serializer_class = OplCreateUpdateSerializer
     update_serializer_class = OplCreateUpdateSerializer
     serializer_class = OplSerializer
+    select_related_fields = ['opl_cate']
 
     def destroy(self, request, *args, **kwargs):
         obj = self.get_object()

apps/third/views.py

@@ -74,7 +74,7 @@ class XxListener(stomp.ConnectionListener):
         print('received an error "%s"' % frame.body)
 
     def on_message(self, frame):
-        data=frame.body
+        data = json.loads(frame.body)
         print('received a message "%s"' % frame.body)