snippet.rb

  def self.private_attributes(*args)
    @@private_attributes = [args].flatten
    
    class_eval do
      def method_missing_with_private_accessor(call, *args)
        method_missing_without_private_accessor(call, *args) unless @@private_attributes.map(&:to_sym).include?(call.to_sym)
      end
      
      alias_method_chain :method_missing, :private_accessor
    end
  end
  
  private_attributes :published=, :title=, :title