BasePresenter

application_helper.rb

module ApplicationHelper
  def present(object, klass = nil)
    klass ||= "#{object.class}Presenter".constantize
    presenter = klass.new(object, self)
    yield presenter if block_given?
    presenter
  end
end

base_presenter.rb

class BasePresenter
  def initialize(object, template)
    @object = object
    @template = template
  end
private

  def self.inherited(klass)
    name = klass.name.match(/(\w+)Presenter/).captures.first.underscore
    klass.instance_eval do
      define_method(name) { @object }
    end
  end

  def method_missing(*args, &block)
    @template.send(*args, &block)
  end
end