laravel/framework — pull request #4628 by EvgenyKovalev (2014-06-09 08:58:50+00:00)
Title: [Proposal] Add nullableMorphs

Repost https://github.com/laravel/framework/pull/4619 to 4.2 branch as requested.

Could be used when logging changes on objects. If other attributes have been changed rather than morph attribute 'null' could be stored.