[Deprecated] DMZ 1.6.2 (DataMapper OverZealous Edition)

[eluser]Wazzu[/eluser]
Delete several rows

I want to delete all students wich are 17 years old.
I can't get it with this simple code. It just deletes one by one, instead of deleting all rows. What's wrong?

Code:

//Set age
$age = 17;

// Get student
$u = new Student();
$u->where('age', $age)->get();

// Delete user
$u->delete();