Simple Controller.

controller.rb

class ThingsController
  def create
    @thing = Thing.new(thing_params)
    thing.creator = current_user
    thing.save!
    Stats.count("Thing Created", 1)
    Thing.delay.send_notifications(thing.id)
  end

  def update
    thing.update!(thing_params)
  end
  
  protected 
  
  def thing
    @thing ||= Thing.find(params[:id])
  end
  
  def thing_params
    params.expect(:thing).permit(:foo, :bar)
  end
end