method

alias_attribute

v2.3.8 - Show latest stable - Class: ActiveSupport::CoreExtensions::Module

alias_attribute(new_name, old_name)

public

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

alias_attribute

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