Ruby and Enterprise Architect

I'm trying to build a class diagram in Sparx Enterprise Architect for future usage in Ruby project.

How should I set up base code datatypes (Settings -> Co开发者_如何学Pythonde Datatypes...)?

It should be something like: Datatype = Common Type (additional notes, if any). Does anyone know what pairs should be input?

I'd also highly appreciate advice on how to import the whole ruby/rails library into Sparx.

Update 1: added links to resources. It's also stated here, that they don't support reverse engineering of ruby code. So, can anyone suggest a different tool for my case?

Many thanks!

Update 2: there is actually one that I've found, but it's quite out of date. Any other ideas?