dm-sinatra-fail.rb

require "rubygems"
require "sinatra" # <----- comment this line to make it work again
require "dm-core"
require "active_support"
require "pp"


class Link
  include DataMapper::Resource

  property :id,             Serial
  property :description,    String, :length => 1024
  property :url,            String, :length => 1024
  
  def to_s(with_title=true)
    "<a href='#{url}'#{" title='#{description}'" if with_title}>#{description}</a>"
  end
  
end
class Entry
  include DataMapper::Resource
  
  property :id,             Serial
  property :title,          String, :length => 255, :index => true
  property :class_name,     Discriminator
  
end
class Person < Entry
	
	has n, :links
	
	property :name,           String, :length => 255, :index => true
	property :email,          String, :length => 255, :index => true
	
end


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

a = Person.create( :name => "ABC" , :email => "abc@def.com" )
a.links.create( :description => "D" , :url => "http://pic.jpg" )
a.links.create( :description => "E" , :url => "http://pic.jpg" )
a.links.create( :description => "F" , :url => "http://pic.jpg" )
a.links.create( :description => "G" , :url => "http://pic.jpg" )
a.save

pp a.links.size

params = { 
  "person" => {
    "links" => {
      "2" => {
        "delete" => "Ta bort"
      }
    }
  },
  "_method" => "delete",
  "id" => "1"
}

pp params
  
person = Person.get( params["id"] )
if links = params["person"].delete( "links" )
  i = links.keys.first.to_i
  l = Link.get( i )
  person.links.delete( l )
end
person.save

pp person.links.size