迁移问题

db/migrate/20190314080805_create_shixun_student_works.rb

@@ -14,7 +14,6 @@ class MigrateShixunWorks1 < ActiveRecord::Migration
   end
 
   def up
-    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)
@@ -23,6 +22,7 @@ class MigrateShixunWorks1 < ActiveRecord::Migration
     shixun_works.each do |work|
       shixun = work.homework_common.try(:homework_commons_shixuns).try(:shixun)
       user = work.user
+      begin
         ActiveRecord::Base.transaction do
           if shixun.present? && user.present?
             # 创建新的myshixun和games
@@ -81,13 +81,13 @@ class MigrateShixunWorks1 < ActiveRecord::Migration
             end
           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
     end
+  end
 
   def down
   end