Ruby carmen 'NameError'

Question

I am using the carmen gem and following the instructions there. When I execute these statements:

require 'carmen'
include Carmen

us = Country.named('United States')

I get a

NameError: uninitialized constant Country

even though I have required and included Carmen. require returns true and include returns Object

Answer 1

The reason is that the Github source and documentation you're seeing is for the latest unreleased version. Put this in your Gemfile instead:

gem "carmen", :git => "git://github.com/jim/carmen.git", :branch => "master"

It's probably best to go to Rubygems and subscribe to the library for updates too, as it's not great to have to rely on an untagged branch in a project.