instance method `alias_attribute`

Ruby on Rails 6.1.7.10

Since v3.0.20

Available in: v3.0.20 v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

alias_attribute(new_name, old_name)

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
person.nickname_short? # => true

Parameters

new_name req
old_name req

Source

# File activemodel/lib/active_model/attribute_methods.rb, line 208
      def alias_attribute(new_name, old_name)
        self.attribute_aliases = attribute_aliases.merge(new_name.to_s => old_name.to_s)
        CodeGenerator.batch(self, __FILE__, __LINE__) do |owner|
          attribute_method_matchers.each do |matcher|
            matcher_new = matcher.method_name(new_name).to_s
            matcher_old = matcher.method_name(old_name).to_s
            define_proxy_call false, owner, matcher_new, matcher_old
          end
        end
      end

Defined in activemodel/lib/active_model/attribute_methods.rb line 208 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveModel::AttributeMethods::ClassMethods

Signature

Parameters