BikeShed-1/db/migrate/20120227040841_add_lockable_to_user.rb

class AddLockableToUser < ActiveRecord::Migration
  def change
    change_table :users do |t|
      t.integer  :failed_attempts, :default => 0 # Only if lock strategy is :failed_attempts
      t.string   :unlock_token # Only if unlock strategy is :email or :both
      t.datetime :locked_at
    end
  end
end