modify

trans2es/models/user.py

@@ -37,11 +37,13 @@ class User(models.Model):
     @classmethod
     def get_user_nick_name(cls,user_id):
         try:
-            nick_name_obj = User.objects.using(settings.SLAVE_DB_NAME).filter(user_id=user_id).values_list("nick_name")
-            return nick_name_obj.nick_name
+            nick_name_obj = User.objects.using(settings.SLAVE_DB_NAME).filter(user_id=user_id).values_list("nick_name").first()
+
+            nick_name = nick_name_obj.nick_name if nick_name_obj else ""
+            return nick_name
         except:
             logging.error("catch exception,err_msg:%s" % traceback.format_exc())
-            return None
+            return ""
 
     def get_is_recommend_flag(self):
         is_shadow = False