RapidDataMapper, a new Object-Relational-Mapper

[eluser]Jelmer[/eluser]
And a question. Maybe I've missed it in the manual but I can't figure out how to do a "WHERE `columnname` IS NULL".

Is it possible to have a "IS NULL" or "IS NOT NULL" condition?

[EDIT]
And one last thing before I call it a night. When I use the following code:

Code:

$domain = Db::find('domain', $id);
$users = Db::related($domain, 'domain_users')->get();

I get the following error:

Fatal error: Call to undefined method Db_Compiled_domain_userMapper::populateFindQuery() in /application/libraries/Db.php on line 556

Which is correct as far as I can see, is it a bug or did I configure something wrong?