author.rb

define_index do
  indexes content
  indexes :name, :sortable => true
  indexes comments.content, :as => :comment_content
  indexes [author.first_name, author.last_name], :as => :author_name

  has author_id, created_at
end

authors_controller.rb

@articles = Article.search params[:search]

decompress_compile_install.sh

tar xzvf sphinx-0.9.9.tar.gz
cd sphinx-0.9.9
./configure --prefix=/usr/local/
make
sudo make install

download.sh

wget http://www.sphinxsearch.com/downloads/sphinx-0.9.9.tar.gz

install_plugin.sh

script/plugin install git://github.com/freelancing-god/thinking-sphinx.git