个人主页中的课程列表出现重复课程

app/controllers/users_controller.rb

@@ -1124,13 +1124,13 @@ class UsersController < ApplicationController
   #显示更多用户课程
   def user_courses4show
     @page = params[:page].to_i + 1
-    @courses = @user.courses.visible.where("is_delete =?", 0).select("courses.*,(SELECT MAX(created_at)  FROM `course_activities` WHERE course_activities.course_id = courses.id) AS a").order("a desc").limit(5).offset(@page * 5)
+    @courses = @user.courses.visible.where("is_delete =?", 0).select("courses.*,(SELECT MAX(updated_at)  FROM `course_activities` WHERE course_activities.course_id = courses.id) AS a").order("a desc").limit(5).offset(@page * 5)
   end
 
   #显示更多用户项目
   def user_projects4show
     @page = params[:page].to_i + 1
-    @projects = @user.projects.visible.select("projects.*,(SELECT MAX(created_at)  FROM `forge_activities` WHERE forge_activities.project_id = projects.id) AS a").order("a desc").limit(5).offset(@page * 5)
+    @projects = @user.projects.visible.select("projects.*,(SELECT MAX(updated_at)  FROM `forge_activities` WHERE forge_activities.project_id = projects.id) AS a").order("a desc").limit(5).offset(@page * 5)
   end
 
   def user_course_activities