init.rb

require "rubygems"
require "friendly"
require "models/user"

Friendly.configure(
  :adapter  => "mysql",
  :host     => "localhost",
  :user     => "root",
  :password => "boot",
  :database => "friendlyplay"
)

user.rb

class User
  include Friendly::Document

  attribute :name, String
  attribute :age,  Integer
  
  indexes :name
end