gistfile1.txt

 % ruby test.rb
  GET [http://localhost:3000/people]
  -> Returned 200 in 0.0567s
[#<Person id=1 name="Paul" created_at=#<DateTime: 212084366581/86400,0,2299161> updated_at=#<DateTime: 212084366581/86400,0,2299161>>]
  GET [http://localhost:3000/people/1]
  -> Returned 200 in 0.0592s
#<Person id=1 name="Paul" created_at=#<DateTime: 212084366581/86400,0,2299161> updated_at=#<DateTime: 212084366581/86400,0,2299161>>

test.rb

require 'rubygems'
require 'dm-core'
require 'dm-types'
require 'pathname'
require Pathname(__FILE__).dirname + 'lib/active_resource_adapter'

DataMapper.setup(:default, :adapter => :active_resource, :site => "http://localhost:3000/")

class Person
  include DataMapper::Resource

  property :id,         Integer, :key => true
  property :name,       String
  property :created_at, DateTime
  property :updated_at, DateTime

end

people = Person.all
puts people.inspect

person = Person.get(1)
puts person.inspect