mongo_example.rb

require "rubygems"
require "mongo_mapper"

MongoMapper.database = 'test_db'

class Person
  include MongoMapper::Document

  key :first_name, String
  key :last_name, String
  key :middle_initial, String
  
  def name
    "#{first_name} #{middle_initial}. #{last_name}"
  end
end

# person = Person.create({
#   :first_name => "David",
#   :last_name => "Eisinger"
# })
# 
# person.save

person = Person.first
p person.name