my $doc = $db->newDoc('12345', undef, {'foo'=>'bar'})->create; - this creates a document and stores it into the DB in one line. This can only be done once, without having the DB generate an error and crap out - Expecting otherwise is only something you should do if you're working with MySQL.

To create a new, blank document object that you can work with, try my $doc = $db->newDoc();, or you could even go so far as my $doc = $db->newDoc->retrieve('12345');

UPDATE: To my mind this is counter-intuitive, as retrieving a document from the DB should be something you do to the DB, not to a document object