Presenter in Rails

My first idea.

I feel this is a waste of method_missing.

# app/model/application_model.rb
class ApplicationModel < ActiveRecord::Base
  self.abstract_class = true

  def method_missing(name, *args, &block)
    begin
      klass = eval "#{self.class.to_s}Presenter"
      presenter = klass.new(self)
      method_name = name.to_s
      presenter.send(method_name)
    rescue
      super
    end
  end
end

# app/models/user.rb
class User < ApplicationModel
  # ...
end

# app/presenters/user_presenter.rb
class UserPresenter
  # ...
end

My second idea.

This is more simple than first idea.

# app/models/user.rb
class User < ActiveRecord::Base
  # ...
  include PostPresenter
end

# app/presenters/post_presenter.rb
module PostPresenter
  # instanse methods

  module ClassMethods
    # class methods
  end

  def self.included(mod)
    mod.extend ClassMethods
  end
end

hmm...

I am looking for better idea than these.