试卷列表的时间排序

app/controllers/exercise_controller.rb

@@ -879,7 +879,7 @@ class ExerciseController < ApplicationController
       if @order == "student_id"
         @exercise_users_list = @exercise_users_list.includes(:user => {:user_extensions => []}).order("user_extensions.student_id #{@b_sort}")
       else
-        @exercise_users_list = @exercise_users_list.includes(:user => {:user_extensions => []}).order("#{@order} #{@b_sort}")
+        @exercise_users_list = @exercise_users_list.includes(:user => {:user_extensions => []}).order("#{@order} #{@b_sort}, id desc")
       end
     end