test case for apparent DataMapper bug when recursively saving associations

.gitignore

Gemfile.lock

Gemfile

source :rubygems

DM_VERSION = "1.2.0"

gem "dm-core", DM_VERSION
gem "dm-constraints", DM_VERSION
gem "dm-migrations", DM_VERSION
gem "dm-sqlite-adapter", DM_VERSION

testcase.rb

#!/usr/bin/env ruby
# encoding: UTF-8

# test case for apparent DataMapper bug when recursively saving associations

require "rubygems"
require "dm-core"
#require "dm-constraints"
require "dm-migrations"

#DataMapper::Logger.new($stdout, :debug)
DataMapper.setup(:default, "sqlite::memory:")
DataMapper::Model.raise_on_save_failure = true

# models

class Person
  include DataMapper::Resource

  property :id, Serial

  has 1, :pet, "Dog", :child_key => :owner_id

end

class Dog
  include DataMapper::Resource

  property :id, Serial

  belongs_to :owner, "Person"
  has n, :parasites, :child_key => :host_id

end

class Parasite
  include DataMapper::Resource

  property :id, Serial

  belongs_to :host, "Dog"

end

DataMapper.finalize
DataMapper.auto_migrate!

# generate data

bug = Parasite.new
pet = Dog.new :parasites => [bug]
guy = Person.new :pet => pet

puts "[INFO] SAVING"
guy.save
puts [guy, pet, bug].map(&:saved?).join(" / ")
puts [guy, pet, bug].map(&:inspect)
puts bug.host_id # nil!
puts bug.dirty? # true => unsaved!