Rails 5.2 finally delivers file upload functionality straight out-of-the-box with a brand new core library called Active Storage. I’ve been using it in client work and side projects since the beta release, and the experience has been fantastic! If you haven’t had a chance to try it yet or you’re debating whether to use it in your next project, check this out: http://www.carlosramireziii.com/the-best-features-of-active-storage.html