diff --git a/app/controllers/courses_controller.rb b/app/controllers/courses_controller.rb
index 2b988e89c..ec34126ac 100644
--- a/app/controllers/courses_controller.rb
+++ b/app/controllers/courses_controller.rb
@@ -77,11 +77,17 @@ class CoursesController < ApplicationController
     # 根据搜索关键字进一步筛选
     if params[:search].present?
       # REDO:Extension
-      user_ids = User.includes(user_extension: :school).where("schools.name like ?", "%#{params[:search]}%").pluck(:id)
-      course_ids = CourseMember.includes(:user, :course).where("course_members.course_id in (?) and course_members.role in (1,2,3)
-                                          and CONCAT(users.lastname, users.firstname) like ?", @courses.map(&:id), "%#{params[:search]}%")
-                                                  .pluck(:course_id)
-      @courses = @courses.where("name like ?", "%#{params[:search]}%").or(@courses.where(tea_id: user_ids)).or(@courses.where(id: course_ids))
+      #user_ids = User.includes(user_extension: :school).where("schools.name like ?", "%#{params[:search]}%").pluck(:id)
+      #course_ids = CourseMember.includes(:user, :course).where("course_members.course_id in (?) and course_members.role in (1,2,3)
+      #                                    and CONCAT(users.lastname, users.firstname) like ?", @courses.map(&:id), "%#{params[:search]}%")
+      #                                            .pluck(:course_id)
+      #@courses = @courses.where("name like ?", "%#{params[:search]}%").or(@courses.where(tea_id: user_ids)).or(@courses.where(id: course_ids))
+      # 6:21 daiao
+      sql = %Q{
+        (course_members.role in (1,2,3) and CONCAT(users.lastname, users.firstname) like :keyword) or courses.name like :keyword
+        or schools.name like :keyword
+      }
+      @courses.includes(course_members: [user: [user_extension: :school]]).where(sql, keyword: "%#{params[:search]}%")
     end
     @courses_count = @courses.size