From: Sean O'Halpin <sean.ohalpin@...>
Date: 2010-09-23T12:22:52+09:00
Subject: Re: Ruby-based data language

Hi Tom,

maybe the Doodle gem does what you're after:

require 'doodle'

class Contact < Doodle
  has :email, :kind => String
  has :phone, :kind => String do
    must "be of form xxx-xxx-xxxx" do |s|
      s =~ /\d{3}-\d{3}-\d{4}/
    end
  end
end

class Person < Doodle
  has :name, :kind => String
  has :age, :kind => Integer
  has Contact
end

class People < Doodle
  has :people, :collect => Person
end

people = People do
  person do
    name "Joe Foo"
    age 33
    contact do
      email "joe.foo@example.com"
      phone "555-555-1234"
    end
  end
end

p people
__END__
#<People:0x8c22ec0 @people=[#<Person:0x8c31100 @name="Joe Foo",
@age=33, @contact=#<Contact:0x8c3ccbc @email="joe.foo@example.com",
@phone="555-555-1234">>]>

Regards,
Sean