diff --git a/db/migrate/20190314080802_create_shixun_student_works.rb b/db/migrate/20190314080805_create_shixun_student_works.rb
similarity index 81%
rename from db/migrate/20190314080802_create_shixun_student_works.rb
rename to db/migrate/20190314080805_create_shixun_student_works.rb
index 240adc00..55e217ff 100644
--- a/db/migrate/20190314080802_create_shixun_student_works.rb
+++ b/db/migrate/20190314080805_create_shixun_student_works.rb
@@ -13,16 +13,16 @@ class CreateShixunStudentWorks < ActiveRecord::Migration
   end
 
   def up
-    ActiveRecord::Base.transaction do
-      begin
-        works = StudentWork.where("myshixun_id != 0 and myshixun_id not in (select id from myshixuns) and (work_score is null or work_score = 0)")
-        works.update_all(:myshixun_id => 0, :work_status => 0, :work_score => nil, :final_score => nil,
-                         :cost_time => 0, :update_time => nil, :compelete_status => 0, :commit_time => nil)
+    begin
+      works = StudentWork.where("myshixun_id != 0 and myshixun_id not in (select id from myshixuns) and (work_score is null or work_score = 0)")
+      works.update_all(:myshixun_id => 0, :work_status => 0, :work_score => nil, :final_score => nil,
+                       :cost_time => 0, :update_time => nil, :compelete_status => 0, :commit_time => nil)
 
-        shixun_works = StudentWork.where("myshixun_id != 0 and myshixun_id not in (select id from myshixuns) and work_score > 0")
-        shixun_works.each do |work|
-          shixun = work.homework_common.try(:homework_commons_shixuns).try(:shixun)
-          user = work.user
+      shixun_works = StudentWork.where("myshixun_id != 0 and myshixun_id not in (select id from myshixuns) and work_score > 0")
+      shixun_works.each do |work|
+        shixun = work.homework_common.try(:homework_commons_shixuns).try(:shixun)
+        user = work.user
+        ActiveRecord::Base.transaction do
           if shixun.present? && user.present?
             # 创建新的myshixun和games
             # fork版本库，如果用户没有同步，则先同步用户
@@ -80,11 +80,11 @@ class CreateShixunStudentWorks < ActiveRecord::Migration
             end
           end
         end
-      rescue Exception => e
-        puts ("###failed to exec shixun: current task id is #{e}")
-        # g.delete_project(gshixun.id) if gshixun.try(:id).present?
-        raise ActiveRecord::Rollback
       end
+    rescue Exception => e
+      puts ("###failed to exec shixun: current task id is #{e}")
+      # g.delete_project(gshixun.id) if gshixun.try(:id).present?
+      raise ActiveRecord::Rollback
     end
   end