功能：24小时内系统消息显示

app/controllers/users_controller.rb

@@ -107,17 +107,18 @@ class UsersController < ApplicationController
     end
     # 记录当前点击按钮的时间
     # 考虑到用户未退出刷新消息页面
-    if OnclickTime.where("user_id =?", User.current).first.nil?
+    message_time = OnclickTime.where("user_id =?", User.current).first
+    if message_time.nil?
       message_new_time = OnclickTime.new
       message_new_time.user_id = User.current.id
       message_new_time.onclick_time = Time.now
       message_new_time.save
     else
-      message_new_time = OnclickTime.where("user_id =?", User.current).first
-      message_last_time = message_new_time.onclick_time
-      message_new_time.update_attributes(:onclick_time => Time.now)
+      # 24小时内显示
+      contrast_time = Time.now - 86400
+      message_time.update_attributes(:onclick_time => Time.now)
     end
-    @user_system_messages = SystemMessage.where("created_at >?", message_last_time).order("created_at desc")
+    @user_system_messages = SystemMessage.where("created_at >?", contrast_time).order("created_at desc")
     # 当前用户查看消息，则设置消息为已读
     if params[:viewed] == "all"
       course_querys = @user.course_messages