修改未读消息500问题

app/controllers/users_controller.rb

@@ -121,7 +121,7 @@ class UsersController < ApplicationController
         messages = MessageAll.where("user_id =?", @user).order("created_at desc")
         messages.each do |message_all|
           # 在点击或者刷新消息列表后未读的消息存放在数组
-          if message_all.message.viewed == 0
+          if message_all.message_type != "SystemMessage" && message_all.message.viewed == 0
             @message_alls << message_all.message
           end
         end