diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 3cedeb18..35449aad 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -6580,7 +6580,7 @@ def update_shixun_work_status homework
   myshixuns = Myshixun.where(:shixun_id => shixun.id, :user_id => student_works.map(&:user_id))
   myshixuns.each do |myshixun|
     work = student_works.where(:user_id => myshixun.user_id).first
-    member = homework.course.members.find_by(:user_id => work.user_id)
+    member = homework.course.members.find_by_user_id(work.user_id)
     setting_time = homework_group_setting homework, member.try(:course_group_id)
     games = myshixun.games.where(:challenge_id => challeng_ids)
     myshixun_endtime = games.select{|game| game.status == 2}.size == games.size ? games.map(&:end_time).max : nil