![RailsCasts (Mobile) show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/035/010/small/railscasts-mobile.jpg)
Summary: Undo and redo behavior is easy to add with a versioning gem such as Paper Trail. Learn how to add an undo link to any model's flash message.
Summary: Undo and redo behavior is easy to add with a versioning gem such as Paper Trail. Learn how to add an undo link to any model's flash message.