working with ruby gems (rgrove's 'sanitize')

I would like to use Sanitize in my ruby app. I'm working with a few friends on this project, so making sure the code works when they git it is important too.

Anyways, on the console I did

>gem install nokogiri  
Building native extensions.  
This could take a while...  
Successfully installed nokogiri-1.4.2  
1 gem installed  
Installing ri documentation for nokogiri-1.4.2...  
Installing RDoc documentation for nokogiri-1.4.2...  
>gem install 
Successfully installed sanitize-1.2.1  
1 gem installed  
Installing ri documentation for sanitize-1.2.1...  
Installing RDoc documentation for sanitize-1.2.1...

then in comment.rb

require 'rubygems'  
require 'sanitize'  
class Comment < ActiveRecord::Base  
  belongs_to :commentable, :polymorphic=>true  
  belongs_to :user  

  before_validation :sanitize_data  

  def sanitize_data  
    Sanitize.clean(message)  
  end  
end

but now, in any time I need to load comments on anything, I get

no such file to load -- sanitize

UPDATE:

I've also tried adding the following to my environment.rb

Rails::Initializer.run do |config|
  config.gem 'nokogiri', :version => '~> 1.4.1', :source => 'http://gems.github.com'
end

gem 'nokogiri', '~> 1.4.1'

require 'nokogiri'

Rails::Initializer.run do |config|
  config.gem 'sanitize', :version => '~> 1.2.1', :source => 'http://gems.github.com'
end

gem 'sanitize', '~> 1.2.1'

require 'sanitize'

and then running

>rake gems:install

and then getting rid of the 'requires' in comment.rb but whenever a comment gets saved, I get the following error

uninitialized constant Comment::Sanitize

What am I doing wrong? What is the best way to do what I am trying to do?

ansaurus

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working with ruby gems (rgrove's 'sanitize')

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