Assume that you have a Grape API (in fact it can be a Rails API or anything else, not the point) with something like Angular.JS for the frontend. As a modern Ruby developer you already using (or want to) Trailblazer for business logic encapsulation. And now you need to upload profile picture for the authenticated users. First question is: what to use for pictures uploading? My choice in most cases falls on the known and classic solution in the Ruby community — CarrierWave gem. It is a flexible and powerful library for uploading and processing files with support of various storages.
