gistfile1.txt

#!ruby
require 'rubygems'
require 'dm-core'

require 'dm-timestamps'
require 'dm-is-versioned'


DataMapper::Logger.new(STDOUT, :debug)
DataMapper.setup(:default, "mysql://root:password@localhost/db_testing")

class Post
  include DataMapper::Resource
  
  property :id, Serial
  property :title, String
  property :type, Discriminator
  property :updated_at, DateTime
  
  timestamps :at
  
  class << self
    # def storage_name repo
    #   'contents'
    # end
  end
  
  is_versioned :on => :updated_at
end

class Comment < Post
  property :content, Text
end

Post.auto_migrate!
Comment.auto_migrate!

post = Post.new
post.title = 'one'
post.save

sleep 5

post.title = 'changed'
# post.updated_at = Time.new + 10000
post.save

comment = Comment.new
comment.content = 'hi'
comment.title = 'yes'
comment.save

comment.content = 'changed, should make a new version'
comment.save 

p comment.versions