diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index e2fdf4739..ccc9a884c 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1894,7 +1894,9 @@ module ApplicationHelper
 
   def sort_homework_path(bid, sort, direction)
     case self.action_name
-    when 'get_not_batch_homework', 'show_courseEx'
+    when 'show_courseEx'
+      get_not_batch_homework_homework_attach_path(bid, sort: sort, direction: 'asc')
+    when 'get_not_batch_homework'
       get_not_batch_homework_homework_attach_path(bid, sort: sort, direction: direction)
     when 'get_batch_homeworks'
       get_batch_homeworks_homework_attach_path(bid, sort: sort, direction: direction)