dm-replace-error.rb

require "rubygems"
require "dm-core"
require "pp"


DataMapper::Logger.new(STDOUT,:debug)
DataMapper.setup(:default, "sqlite3://#{Dir.pwd}/bula.db")


class Entry
  include DataMapper::Resource
  
  has n, :related
  
  property :id,             Serial
  property :title,          String, :length => 255, :index => true
  property :class_name,     Discriminator
  
end

class Person < Entry
	
	property :name,           String, :length => 255, :index => true
	property :email,          String, :length => 255, :index => true
	
end

class Media < Entry
  
  property :id,             Serial
  property :url,            String, :length => 1024
  
end

class Work < Entry
  
  property :body,           Text
    
end

class Related 
  include DataMapper::Resource
  
  belongs_to :to, :model => Entry
  
  has 1, :entry, :through => Resource
  
  property :id,             Serial
  property :title,          String, :length => 255
  property :created_at,     DateTime
  property :updated_at,     DateTime
  
end

DataMapper.auto_migrate!

m = Media.create( :url => "ABC" )
p = Person.create( :email => "ABC" )

w = Work.create( :body => "DEF" )
w.related.create( :title => "A" , :entry => m )
w.related.create( :title => "B" , :entry => p )
w.save