object collection wrap with a presenter that can be render by render method rails 3.0

gistfile1.rb

class FooCollectionPresenter < SimpleDelegator
  include Enumerable
   def iterate_with_index
     self.each_with_index do |foo, index|
       yield(FooPresenter.new(foo), index)
     end
   end

  def iterate
    self.map do |foo|
      yield(FooPresenter.new(foo))
    end
  end

  def to_ary
    self.map do |foo|
      FooPresenter.new(foo)
    end
  end
end