trashable.rb

# encoding: utf-8
module Trashable
  extend ActiveSupport::Concern
  
  included do
    define_model_callbacks :trash, :only => [ :after, :before ]
    
    default_scope   where('trashed_at IS NULL')
    scope :trashed, where('trashed_at IS NOT NULL')
  end
  
  def trash
    run_callbacks :trash do
      update_attribute :trashed_at, DateTime.now
    end
  end
  
  def restore_from_trash
    update_attribute :trashed_at, nil
  end
end