AASM basic

aasm-1.rb

class Plan < ActiveRecord::Base
  include AASM

  aasm column: 'state' do
    state :pending, initial: true
    state :processing
    state :finished
    state :errored

    event :process, after: Proc.new { start } do
      transitions from: :pending, to: :processing
    end

    event :finish, after: Proc.new { finish } do
      transitions from: :processing, to: :finished
    end

    event :fail do
      transitions from: :processing, to: :errored
    end
  end

  validates :stripe_id, uniqueness: true

  def self.published(stripe_id)
    plan = find_by(stripe_id: stripe_id)
    plan.update(published: true)
  end

  #　特定のトランザクションが発生した際に以下のものがコールバックされる。
  def start
    puts 'started!!!'
  end

  def finish
    self.finish
    puts 'finished!!!'
  end
end