article.rb

class Article < ActiveRecord::Base
  belongs_to :author

  searchable do
    text :title, :boost => 2.0
    text :body
    text :author_name do
      author.name
    end
    time :updated_at       # for sorting by recent
    string :sort_title do  # for sorting by title, ignoring leading A/An/The
      title.downcase.gsub(/^(an?|the)/, '')
    end
    boolean :published, :using => :published?
  end

  def published?
    state == :published
  end
end