我可以使用什么gem来处理Rails5中的状态转换？

class Order < ApplicationRecord
  include AASM

  aasm column: 'status' do
    state :pending, initial: true
    state :processing
    state :completed
    state :cancelled

    event :process do
      transitions from: :pending, to: :processing
    end

    event :complete do
      transitions from: :processing, to: :completed
    end

    event :cancel do
      transitions from: [:pending, :processing], to: :cancelled
    end
  end
end

order = Order.find(params[:id])
order.process! # 将订单状态从pending转换为processing