ruby - Rails engines extending functionality

Question

I have an engine which defines some models and controllers. I want to be able to extend functionality of some models/controllers in my application (eg. adding methods) without loosing the original model/controller functionality from engine. Everywhere I read that you simply need to define controller with the same name in your application and Rails will automatically merge them, however it doesn't work for me and controller in engine is simply ignored (I don't think it's even loaded).

Answer 1

require MyEngine::Engine.root.join('app', 'models', 'my_engine', 'my_model')

before the model class definition in your application.