The most important lesson I've learned from Rails is that you always have to learn the framework internals. If you're doing anything non-trivial, there will alw

The most important lesson I've learned from Rails is that you always have to learn the framework internals. If you're doing anything non-trivial, there will always be very helpful undocumented features, a much, much easier way to do things, and you can know how to build out entirely new functionality and keep it consistent with the core system so future developers don't have to learn every detail of your solution.