Method: Module#alias_attribute

Defined in:

lib/core_ext.rb

#alias_attribute(new_name, old_name) ⇒ Object

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"

# File 'lib/core_ext.rb', line 201

def alias_attribute(new_name, old_name)
  module_eval "    def \#{new_name}; self.\#{old_name}; end          # def subject; self.title; end\n    def \#{new_name}?; self.\#{old_name}?; end        # def subject?; self.title?; end\n    def \#{new_name}=(v); self.\#{old_name} = v; end  # def subject=(v); self.title = v; end\n  STR\nend\n", __FILE__, __LINE__ + 1