Breaking up fat models example from http://svs.io/post/38883550750/breaking-up-fat-models-with-delegation#disqus_thread

breaking_up_fat_models.rb

require 'forwardable'

class User
 
  extend Forwardable
  attr_accessor :view_delegate_class, :first_name, :last_name
  def_delegators :view_delegate, :full_name
  
  def initialize(first_name, last_name)
    @first_name = first_name  
    @last_name = last_name
  end   
  
  def view_delegate
    (@view_delegate_class || UserViewDelegate).new(self)
  end
end
 
class UserViewDelegate
 
  def initialize(user)
    @user = user
  end 
  
  def full_name
    "#{first_name} #{last_name}"
  end
  
  def method_missing(name, *args)
    @user.send(name, *args)
  end   
  
end

abhay = User.new('abhay', 'tandon')
puts abhay.full_name