ActiveModel::AttributeMethods::ClassMethods

Allows you to make aliases for attributes. class Person include ActiveModel::AttributeMethods attr_accessor :name attribute_method_suffix '_short?' define_attribute_methods :name alias_attribute :nickname, :name private def attribute_short?(attr) send(attr).length < 5 end end person = Person.new person.name = 'Bob' person.name # => "Bob" person.nickname # => "Bob" person.name_short? # => true pers