Best image uploader for Rails — Revisited

Three years ago I wrote about how to choose the right uploader gem for your project. Since the time the original article has been published, all mentioned libraries got updated, one got deprecated, and two new libraries have appeared. I feel it’s time to revisit this topic.Why do we use uploader gems?Rails handles file-upload natively. When a file gets uploaded to your app it’s represented by an UploadedFile object, which is a wrapper around the underlying Tempfile object that contains the data sent to the server.