Routing in Rails is small but an important part of our applications. The Rails router recognizes URLs and dispatches them to a controller's action, or to a Rack application. It can also generate paths and URLs, avoiding the need to hardcode strings in your views.
Using Scenic, you can bring the power of SQL views to your Rails application without having to switch your schema format to SQL. Scenic provides a convention for versioning views that keeps your migration history consistent and reversible and avoids having to duplicate SQL strings across migrations.
CSS Bundling for Rails provides a new way for importing and managing our CSS assets in Rails Applications, but it does have some challenges around a few libraries (specifically font awesome and a few others) which we'll look at in this episode.