UUID: got error on jruby

[walla]

Hi!
Got this error when using dm on jruby with UUID field type:
ERROR: column "c$uuid" is of type uuid but expression is of type character varying
Hint: You will need to rewrite or cast the expression.
Position: 88 (code: 0, sql state: 42804, query: INSERT INTO "t$gp_events" ("c$uuid", "c$number", "c$s", "c$tx", "c$ac", "c$d") VALUES ('48cfcb78-5883-4d58-b81c-b4d2e6dd304b', '100487', '1.0', '1000000041342594267', '68473', '2012-04-23 16:03:14.000000 +04:00:00'), uri: )

my model:

class Events
  include DataMapper::Resource
  storage_names[:default] = 't$gp_events'
  property :uuid, UUID, :field => 'c$uuid', :key => true
  property :number, Integer, :field => 'c$number'
  property :s, Float, :field => 'c$s'
  property :tx, Integer, :field => 'c$tx'
  property :ac, Integer, :field => 'c$ac'
  property :d, DateTime, :field => 'c$d'
end

everything fine on MRI

[ghost]

The UUID property will end up in the database as a simple string, dm-types doesn't know about the uuid column type.

[walla]

sure. but just the same code works fine with MRI(1.9.2) and give such error on JRuby(1.6.7) datamapper 1.20