module ActiveModel::AttributeMethods::ClassMethods

person.nickname_short? # => true
person.name_short? # => true
person.nickname # => "Bob"
person.name # => "Bob"
person.name = 'Bob'
person = Person.new

end
end
send(attr).length < 5
def attribute_short?(attr)
private

alias_attribute :nickname, :name

define_attribute_methods :name
attribute_method_suffix '_short?'
attr_accessor :name

include ActiveModel::AttributeMethods
class Person

Allows you to make aliases for attributes.

def alias_attribute(new_name, old_name)
  old_name = old_name.to_s
  new_name = new_name.to_s
  self.attribute_aliases = attribute_aliases.merge(new_name => old_name)
  aliases_by_attribute_name[old_name] << new_name
  eagerly_generate_alias_attribute_methods(new_name, old_name)
end