迁移优化，原来需要1800秒，现只需800秒

11 years ago · c893a2d99b
parent 0402fee6de
commit c893a2d99b
1 changed files with 6 additions and 4 deletions
--- a/db/migrate/20150227085333_add_data_to_project_issues_indexs_in_issue.rb
+++ b/db/migrate/20150227085333_add_data_to_project_issues_indexs_in_issue.rb
@ -1,5 +1,6 @@
 class AddDataToProjectIssuesIndexsInIssue < ActiveRecord::Migration
  def change
+    transaction do
      for i in 1 ... 1000 do i
        Issue.page(i).per(10).each do |e|
          index = e.project.issues.index(e).to_i + 1
@ -8,3 +9,4 @@ class AddDataToProjectIssuesIndexsInIssue < ActiveRecord::Migration
      end
    end
  end
+end