An attempt to find a failing case with string keys.

string_keys_test.rb

require 'rubygems'
require 'dm-core'
require 'uuid'
require_relative 'lib/dm-redis-adapter/adapter.rb'

DataMapper.setup(:default, {:adapter  => "redis"})

class Zone
  include DataMapper::Resource

  property :id, String, :key => true, :unique_index => true, :default => lambda { |x,y| UUID.new.generate }
  property :preview_mode, Boolean, :default => false

  has 1, :campaign
end

class Campaign
  include DataMapper::Resource

  property :id, String, :key => true, :unique_index => true, :default => lambda { |x,y| UUID.new.generate }
  property :name, String
  belongs_to :zone

end

DataMapper.finalize

z = Zone.create
c = Campaign.create(:name => "The light on the Bosporus", :zone => z)

puts Campaign.first.zone
puts Zone.first.campaign.name