DCI Example

gistfile1.rb

class CheckoutController
  def new
    checkout = ChecktoutContext.new
    @order = checkout.order
  end
end

class CheckoutContext
  def initialize
    @order = Order.new
    @order.send(:include, CheckoutRole)
  end
end


module CheckoutRole
   # methods related to checkout
  extend ActiveSupport::Concern

  module InstanceMethods
    def finalize!
      # ...
    end
  end
end


class Order
  # ...
end