I have a couple of pre-existing applications which I need to run in "one" app. One is the application I want to use for authentication etc, whilst the other is another app that contains all of the business logic.
Both apps have pre-existing authentication, and both have fairly complex user models.
Is it possible to easily combine these so that if I log into one application and create a user, that same data is available in the other - or something similar?
What is the easiest way of doing this? Can a rails model extend a REST webservice?