Change 20150113213922_remove_users_mail.rb from Irreversible to Reversible (#19233).

git-svn-id: http://svn.redmine.org/redmine/trunk@14052 e93f8b46-1217-0410-a6f0-8f06a7374b81

db/migrate/20150113213922_remove_users_mail.rb

@@ -4,6 +4,10 @@ class RemoveUsersMail < ActiveRecord::Migration
   end
 
   def self.down
-    raise IrreversibleMigration
+    add_column :users, :mail, :string, :limit => 60, :default => '', :null => false
+
+    EmailAddress.where(:is_default => true).each do |a|
+      User.where(:id => a.user_id).update_all(:mail => a.address)
+    end
   end
 end