Restful state machine transition in Rails

class MembershipTransitionController < ApplicationController
  def update
    if @membership.fire_events(params[:event_name])
      # handle success transition case
    else
      # handle failed transition
    end
  end
end

class Membership < ActiveRecord::Base
  state_machine :state, initial: :applied do
    event :approve do
      transition :applied => :active
    end
    
    event :revoke do
      transition :active => :inactive
    end
    
  ...
  end
end