Loading a class inside a module within Rails 3.0

api.rb

# within app/importer/api.rb

module Importer
  class API
    # class body here
  end
end

api2.rb

# this way works for some reason

# inside app/importer/api.rb

class Importer::API
  # class body here
end

error.txt

/Users/jake/Code/experimental/myproject/config/application.rb:10)
Loading development environment (Rails 3.0.10)
ruby-1.9.2-p290 :001 > Importer::API.new
LoadError: Expected /Users/jake/Code/experimental/myproject/app/importer/api.rb to define API