Relationship trouble

[itvik...@gmail.com]

Hi. I have 2 tables : shop and productand relationship one to many

$shop = R::dispense( 'shop' );
$shop->name = 'Antiques';
$vase = R::dispense( 'product' );
$vase->price = 25;
$shop->ownProductList[] = $vase;
R::store( $shop ); 

I want to add the product to the store knowing the ID store 

$shop = R::load( 'shop', $id );
$flower= R::dispense( 'product' );
$flower->price = 100500;
$shop->ownProductList[]=$flower;
R::store($shop);

How do I do this without calling the shop by id?