class_eval implementation

gistfile1.rb

require 'active_record'

module SaveAsDraft
  ActiveRecord::Base.class_eval do
    alias_method :save_without_draft, :save

    def save_with_draft
      if self.has_attribute?(:record_status) and self.record_status == "Draft"
        save_without_draft(:validate => false)
      else
        save_without_draft
      end
    end

    alias_method :save, :save_with_draft
  end
end
ActiveRecord::Base.send(:extend, SaveAsDraft)