method

alias_attribute

v5.2.3 - Show latest stable - 1 note - Class: Module

alias_attribute(new_name, old_name) public

Allows you to make aliases for attributes, which includes getter, setter, and a predicate.

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"

Show source

# File activesupport/lib/active_support/core_ext/module/aliasing.rb, line 21 def alias_attribute(new_name, old_name) # The following reader methods use an explicit `self` receiver in order to # support aliases that start with an uppercase letter. Otherwise, they would # be resolved as constants instead. module_eval 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, __FILE__, __LINE__ + 1 end

March 27, 2009

2 thanks

Deprecated - replacement method

The description rightly lists this as deprecated, but using it will still work atm, as it seems to have moved to ActiveSupport::CoreExtensions::Module instead.

So your code should still work.

alias_attribute

Related methods

Deprecated - replacement method