Renaming my objects? What do I have to do?

Ok so I’ve got a poorly named object called Request and it’s colliding
with the Request object provided by Rails. Whoops. I’d like to rename
it to something more descriptive however, I’ve written all this code
using it. My controller, model objects, and database. Is there an easy
way, maybe a generator, for renaming these objects so I don’t mess
things up? I’d like to rename it to something like FeatureRequest what
does that translate to in ActiveRecord?

Thanks
Charlie