http://rebuilding-rails.com/ http://rebuilding-rails.com/ by Noah Gibbs is a nice resource if you find it helpful to understand things at a lower layer of abstr

http://rebuilding-rails.com/ http://rebuilding-rails.com/ by Noah Gibbs is a nice resource if you find it helpful to understand things at a lower layer of abstraction. It is particularly useful for giving you the background that you can do something like replacing controllers with middlewares in order to increase modularity/testability (see https://gocardless.com/blog/coach/ https://gocardless.com/blog/coach/).