rails/activeresource — pull request #121 by tylerkovacs (2014-02-25 20:15:23+00:00)
Title: Dirty model integration

This pull request introduces `ActiveModel::Dirty` integration into` ActiveResource::Base`. As a result, `ActiveResource::Base#update` will only write changed attributes to the remote resource. If there are no changed attributes, then the call to `ActiveResource::Base#update` returns immediately.

@strzalek @tamird