ActiveDecoratorでdecorateしたオブジェクトのhas_one/belong_to先のオブジェクトが自動でdecorateされるようにする ref: http://qiita.com/skuroki@github/items/087e0953583d259738a5

file0.txt

module AssociationDecorator
  def reader(*args)
    result = super
    if self.owner.is_a?(ActiveDecorator::Helpers)
      ActiveDecorator::Decorator.instance.decorate(result)
    end
    result
  end
end

module ActiveRecord
  module Associations
    class SingularAssociation
      prepend AssociationDecorator
    end
  end
end