Extraction Blog Post

contact.rb

class Contact < ActiveRecord::Base
  belongs_to :user

  def name
    "#{first_name} #{last_name}"
  end
end

contact_spec.rb

require 'lib/logic/contact'

class FakeContact
  include Logic::Contact
  attr_accessor :first_name, :last_name
end

describe Logic::Contact do
  subject do
    contact = FakeContact.new
    contact.first_name = "Anthony"
    contact.last_name = "Eden"
    contact
  end

  it "has a name" do
    subject.name.should eq("#{subject.first_name} #{subject.last_name}")
  end
end

domain.rb

class Domain < ActiveRecord::Base
  # ...lots of code...
  def auto_renew?
   registry_domain.auto_renew?
  rescue => e
    logger.error e
    false
  end
  # ... more code ...
end

logic_contact.rb

class Contact < ActiveRecord::Base
  include Logic::Contact
  belongs_to :user
end

module Logic
  module Contact
    def name
      "#{first_name} #{last_name}"
    end
  end
end

logic_domain_renewable.rb

class Domain < ActiveRecord::Base
  include Logic::Domain::Renewable
end

module Logic
  module Domain
    module Renewable
      def auto_renew?
       registry_domain.auto_renew?
      rescue => e
        logger.error e
        false
      end
    end
  end
end