讨论区帖子添加回复时，取消修改帖子的更新时间。项目最新动态只显示最新的回复，不将帖子创建重复显示

app/controllers/messages_controller.rb

@@ -85,7 +85,7 @@ class MessagesController < ApplicationController
     @reply.board = @board
     @reply.safe_attributes = params[:reply]
     @topic.children << @reply
-    @topic.update_attribute(:updated_on, Time.now)
+    #@topic.update_attribute(:updated_on, Time.now)
     if !@reply.new_record?
       call_hook(:controller_messages_reply_after_save, { :params => params, :message => @reply})
       attachments = Attachment.attach_files(@reply, params[:attachments])