Patrick Lenz has announced his
acts_as_searchable plugin which integrates ActiveRecord models with HyperEstraier, an open source fulltext search engine.
It’s available as a gem so you can just do
sudo gem install acts_as_searchable.
You can then take a look at the API docs, which provide a few examples.
Full text searching just got as simple as:
class Article < ActiveRecord::Base
Article.fulltext_search(‘biscuits AND gravy’)