[Deprecated] DMZ 1.5.3 (DataMapper OverZealous Edition)

[eluser]introvert[/eluser]
I have has_many to has_many releation betwen 2 objects.

Code:

$a = new Object1();
$a->get_by_id($id1);
$b = new Object2();
$b->get_by_id($id2);

$b->save($a);

How can I check if relation is already made betwen those two?

If I want to have more relations (with other data) betwen two objects, how can this be implemented? By default DMZ will allow me to do only one relation betwen 2 objects.

Thanks for help!