gistfile1.builder

require 'rubygems'
require 'dm-core'
require 'dm-types'

DataMapper.setup(:default, "abstract::")

class Person
	include DataMapper::Resource
	
	property :id, Serial
	property :name, String
	property :status, Enum[:registered, :guest], :default => :guest
end

class Post
	include DataMapper::Resource
	
	property :id, Serial
	
	belongs_to :person
end

pete = Person.new(:name => 'pete', :status => :registered) # => <Person @id=nil @name="pete" @status=:registered>
post = Post.new(:person => pete) # => <Post @id=nil @person_id=nil>
pete # => <Person @id=nil @name="pete" @status=1>
post.person # => <Person @id=nil @name="pete" @status=nil>
pete # => <Person @id=nil @name="pete" @status=nil>