This is a simple plugin that will add a before_save callback to add nofollow to all links within the given fields.

Example use:

Install the plugin:

ruby script\plugin install http://svn.railslodge.com/svn/plugins/nofollow_links/

Simply add this to the required fields

e.g. Example model:

class Plugin < ActiveRecord::Base
    #plugins
    nofollow_links :content, :title
end

See http://www.railslodge.com/plugins/106-nofollow-links for further details.