hakanensari/mongoid-slug — pull request #64 by Empact (2012-04-11 20:49:31+00:00)
Title: Be a bit tidier in how we generate the callbacks

I'm doing some callback wrangling elsewhere and it would be nicer if mongoid-slug were to generate the callback using symbols.

Using the minimal callback in the :permanent case was an after-thought, but I think legit.