mongoid/mongoid — pull request #1920 by shingara (2012-04-16 12:00:59+00:00)
Title: add method #touch methode to update the updated_at field if Mongoid::Timestamps.:Updated is include

A feature in ActiveRecord can be good to have in Mongoid is the #touch method. When you call it on one of your object, the `updated_at` field is update to now.

This methode works only when Mongoid::Timestamps::Updated is include by himself or by Mongoid::Timestamps.