thirteen-tien-len_classic/db/migrate/20150102000704_add_confirmable_to_users.rb

class AddConfirmableToUsers < ActiveRecord::Migration
  def change
    add_column :users, :confirmation_token, :string
    add_column :users, :confirmed_at, :datetime
    add_column :users, :confirmation_sent_at, :datetime
    add_column :users, :unconfirmed_email, :string
  end
end