如何将大型Rails应用程序切割成可以协同工作的较小应用程序？

I have worked a bit with Django and I quite like its project/applications model : you can build a Django project by assembling one or more Django applications. These applications can be autonomous, or some applications can be built on top of other applications. An application can easily rely on another application's models, as well as its controllers (Django dudes call them "views") and even its views ("templates" in Django-speak).I have worked a bit with Django and I quite lik