I’ve now worked on three different Rails applications. One of them was from scratch, the other two I took over from someone else. The thing I like most about Rails is Active Record – it just works and it is easy to use – even for existing databases (although it takes a bit more work to specify the mappings).
I have a project coming up that would probably be a great Seaside candidate. The database has to be postgresql (according to the client). There is a native cocoa component – I’ll probably give BaseTen a try. For the web component, the obvious candidates are Rails (although I don’t know the state of Rails with PG – only mysql), and Seaside/Glorp – but I need to use Glorp to work like Active Record since the DB will be the master source of record for the schema.
Sadly, it doesn’t look like Glorp’s ActiveRecord on Squeak is ready for prime time, I might have to kind of finish that implementation.