diff --git a/app/models/discuss.rb b/app/models/discuss.rb
index 4491a886c..54ceb46be 100644
--- a/app/models/discuss.rb
+++ b/app/models/discuss.rb
@@ -53,11 +53,11 @@ class Discuss < ApplicationRecord
 
   def send_tiding
     if dis_type == 'Shixun'
-      user_id = has_parent? ? parent.user_id : Challenge.find(challenge_id).user_id
+      send_user_id = has_parent? ? parent.user_id : Challenge.find(challenge_id).user_id
       parent_container_type = 'Challenge'
       challenge_id = challenge_id
     elsif dis_type == 'Hack'
-      user_id = has_parent? ? parent.user_id : Hack.find(dis_id).user_id
+      send_user_id = has_parent? ? parent.user_id : Hack.find(dis_id).user_id
       parent_container_type = 'Hack'
       challenge_id = dis_id
     end
@@ -65,6 +65,6 @@ class Discuss < ApplicationRecord
         trigger_user_id: user_id, parent_container_id: challenge_id, parent_container_type: parent_container_type,
         belong_container_id: dis_id, belong_container_type: dis_type, viewed: 0, tiding_type: 'Comment'
     }
-    tidings.create!(base_attrs.merge(user_id: user_id))
+    tidings.create!(base_attrs.merge(user_id: send_user_id))
   end
 end