error couchrest_model [not found]

Hey all

I've create a rails 3 project and added the following to the gem file:

# Require Couchdb
gem 'couchrest', '>= 1.0.0.beta'
gem 'couchrest_model'

Everything installs when running bundle install

But when I try to do this:

rails generate model User --orm=couchrest_model

I get this error:

error couchrest_model [not found]

The gem is installed, so what is the problem?

Thanks