超级管理员的课堂列表导出时会有部分数据缺失

app/controllers/managements_controller.rb

@@ -1796,7 +1796,7 @@ end
     @school_id = params[:school_id]
 
     if params[:school_id] && params[:school_id] != ''
-      @courses = Course.joins("join users u on courses.tea_id = u.id").joins("join user_extensions ue on u.id = ue.user_id").where("ue.school_id = #{params[:school_id]}")
+      @courses = @courses.joins("join user_extensions ue on courses.tea_id = ue.user_id").where("ue.school_id = #{params[:school_id]}")
     end
 
     if params[:homepage_show]
@@ -1819,7 +1819,7 @@ end
         user_id = User.where("concat(lastname, firstname) like '%#{@search}%'")
         @courses = @courses.joins("join users u on courses.tea_id = u.id").where("concat(u.lastname, u.firstname) like '%#{@search}%'")
       end
-    else
+    elsif "dep_name" == @keyword
       school = School.where("name like '%#{@search}%'").map(&:id)
       @courses = @courses.where(:school_id => school)
       # @courses= @courses.where("name like '%#{@search}%'")