Could not find generator mongoid:roles_migration

[andrelee]

I am trying to run the command "rails g mongoid:roles_migration User --strategy one_role --roles user special editor --no-default-roles" mentioned in the wiki and I ran into "Could not find generator mongoid:roles_migration" error. I don't see generator mongoid:roles_migration when I run "rails g":

Mongoid:
mongoid:config
mongoid:devise
mongoid:roles

RolesGeneric:
roles_generic:roles

This is my gem list and I am using ruby 1.8.7:
Using rake (0.9.2.2)
Using i18n (0.6.0)
Using multi_json (1.1.0)
Using activesupport (3.2.2)
Using builder (3.0.0)
Using activemodel (3.2.2)
Using erubis (2.7.0)
Using journey (1.0.3)
Using rack (1.4.1)
Using rack-cache (1.2)
Using rack-test (0.6.1)
Using hike (1.2.1)
Using tilt (1.3.3)
Using sprockets (2.1.2)
Using actionpack (3.2.2)
Using mime-types (1.18)
Using polyglot (0.3.3)
Using treetop (1.4.10)
Using mail (2.4.4)
Using actionmailer (3.2.2)
Using arel (3.0.2)
Using tzinfo (0.3.32)
Using activerecord (3.2.2)
Using activeresource (3.2.2)
Using bcrypt-ruby (3.0.1)
Using bson (1.6.1)
Using bson_ext (1.6.1)
Using bundler (1.0.22)
Using coffee-script-source (1.2.0)
Using execjs (1.3.0)
Using coffee-script (2.2.0)
Using rack-ssl (1.3.2)
Using json (1.6.5)
Using rdoc (3.12)
Using thor (0.14.6)
Using railties (3.2.2)
Using coffee-rails (3.2.2)
Using orm_adapter (0.0.6)
Using warden (1.1.1)
Using devise (2.0.4)
Using jquery-rails (2.0.1)
Using mongo (1.6.1)
Using mongoid (2.4.7)
Using rails (3.2.2)
Using require_all (1.2.1)
Using sugar-high (0.4.9.5)
Using rails_assist (0.4.4)
Using rails_artifactor (0.3.6)
Using roles_generic (0.3.9)
Using roles_mongoid (0.4.8)
Using sass (3.1.15)
Using sass-rails (3.2.5)
Using uglifier (1.2.3)

Am I missing anything? Thanks in advance.

[kristianmandrup]

I have no idea. Haven't looked at it for a long time. Please check the code ;)