DataMapper - Counting related items

[eluser]WanWizard[/eluser]
Have you checked the manual? It has a section on counting related items:

Code:

$continent = new Continent;
$continent->get_by_id(1);
$count = $continent->country->person->count();

As always, if the result is not what you expect it to be, dump the query using check_last_query(). You should be able to deduct from the generated SQL what is wrong with your statement.