alias_attribute(new_name, old_name) — ActiveSupport::CoreExtensions::Module

alias_attribute(new_name, old_name)

Allows you to make aliases for attributes, which includes getter, setter, and query methods.

Example:

class Content < ActiveRecord::Base
  # has a title attribute
end

class Email < Content
  alias_attribute :subject, :title
end

e = Email.find(1)
e.title    # => "Superstars"
e.subject  # => "Superstars"
e.subject? # => true
e.subject = "Megastars"
e.title    # => "Megastars"

Parameters

new_name req
old_name req

Source

# File activesupport/lib/active_support/core_ext/module/aliasing.rb, line 65
      def alias_attribute(new_name, old_name)
        module_eval <<-STR, __FILE__, __LINE__ + 1
          def #{new_name}; self.#{old_name}; end          # def subject; self.title; end
          def #{new_name}?; self.#{old_name}?; end        # def subject?; self.title?; end
          def #{new_name}=(v); self.#{old_name} = v; end  # def subject=(v); self.title = v; end
        STR
      end

Defined in activesupport/lib/active_support/core_ext/module/aliasing.rb line 65 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveSupport::CoreExtensions::Module

Signature

Parameters