norman/friendly_id — pull request #295 by pixeltrix (2012-06-06 09:01:22+00:00)
Title: Delegate to_param to super when friendly_id is not present.

Currently ActiveRecord::Base#to_param returns nil when the record
is not persisted. Rather than calling to_s on id, call super instead
so that we get the default behavior.

Closes #294.