This gem is an extension to paper_trail gem https://github.com/airblade/paper_trail. That means you need to pre install paper_trail gem. This gem will add one more method actor to instances of PaperTrail::Version that will return you the ActiveRecord object who was responsible for change.
An extension to PaperTrail that allows you to retrieve the ActiveRecord object (actor) that was responsible for creating or modifying records, enabling better audit trails and change attribution.