Couch Rest model - error

gistfile1.rb

=begin
shop2 = ShoppingCoupon.new(:name => 'Shop', :description =>"Clothes", 
                                 :items => [{:name => 'shirt', :price => 2.50}, {:name => 'pants', :price => 5}],
                                 :purchased =>2011/03/21, :amount => 43.2)
shop2.save                          
=end

class ShoppingCoupon < CouchRest::Model::Base
  use_database CouchServer.default_database

  property :name, String
  property :description, String
  
  property :items do
    property :name, String
    property :price, Float
  end
  
  property :purchased, DateTime
  property  :amount, Float
  
  timestamps!  
end


Result:

ruby-1.9.2-head :001 > shop2 = ShoppingCoupon.new(:name => 'Shop', :description =>"Clothes", :items => [{:name => 'shirt', :price => 2.50}, {:name => 'pants', :price => 5}],:purchased =>2011/03/21, :amount => 43.2)
 => {"name"=>"Shop", "description"=>"Clothes", "price"=>nil, "items"=>[{}, {}], "purchased"=>31, "amount"=>43.2, "updated_at"=>nil, "created_at"=>nil, "couchrest-type"=>"ShoppingCoupon"} 
ruby-1.9.2-head :002 > shop2.save
 => {"name"=>"Shop", "description"=>"Clothes", "price"=>nil, "items"=>[{}, {}], "purchased"=>31, "amount"=>43.2, "updated_at"=>2011-04-29 21:41:20 -0300, "created_at"=>2011-04-29 21:41:20 -0300, "couchrest-type"=>"ShoppingCoupon", "_id"=>"f212a7d0dbb0a32bf258ce84205eb152", "_rev"=>"1-44e7ff592310280a4cbb2ecacbc81945"} 
ruby-1.9.2-head :003 > 

Fugly console post from my latest branch:

ruby-1.9.2-p180 :023 > class ShoppingCoupon < CouchRest::Model::Base
ruby-1.9.2-p180 :024?> property :name, String
ruby-1.9.2-p180 :025?> property :description, String
ruby-1.9.2-p180 :026?>
ruby-1.9.2-p180 :027 > property :items do
ruby-1.9.2-p180 :028 > property :name, String
ruby-1.9.2-p180 :029?> property :price, Float
ruby-1.9.2-p180 :030?> end
ruby-1.9.2-p180 :031?>
ruby-1.9.2-p180 :032 > property :purchased, DateTime
ruby-1.9.2-p180 :033?> property :amount, Float
ruby-1.9.2-p180 :034?>
ruby-1.9.2-p180 :035 > timestamps!
ruby-1.9.2-p180 :036?> end
=> [ShoppingCoupon]
ruby-1.9.2-p180 :037 > shop2 = ShoppingCoupon.new(:name => 'Shop', :description =>"Clothes",
ruby-1.9.2-p180 :038 > :items => [{:name => 'shirt', :price => 2.50}, {:name => 'pants', :price => 5}],
ruby-1.9.2-p180 :039 > :purchased =>2011/03/21, :amount => 43.2)
=> {"name"=>"Shop", "description"=>"Clothes", "items"=>[{"name"=>"shirt", "price"=>2.5}, {"name"=>"pants", "price"=>5.0}], "purchased"=>31, "amount"=>43.2, "updated_at"=>nil, "created_at"=>nil, "model"=>"ShoppingCoupon"}
ruby-1.9.2-p180 :040 > shop2.save
=> {"name"=>"Shop", "description"=>"Clothes", "items"=>[{"name"=>"shirt", "price"=>2.5}, {"name"=>"pants", "price"=>5.0}], "purchased"=>31, "amount"=>43.2, "updated_at"=>2011-04-30 01:00:19 UTC, "created_at"=>2011-04-30 01:00:19 UTC, "model"=>"ShoppingCoupon", "_id"=>"08f5c6af80735b6b5db8ada16bbc97cf", "_rev"=>"1-4563442f56af38096a19291f00673221"}