/**
* For a given product, retrieves its suppliers
*
* @param int $id_product
* @param int $group_by_supplier
* @return Collection
*/
public static function getSupplierCollection($id_product, $group_by_supplier = true)
{
$suppliers = new PrestaShopCollection('ProductSupplier');
$suppliers->where('id_product', '=', (int) $id_product);
if ($group_by_supplier) {
$suppliers->groupBy('id_supplier');
}
return $suppliers;
}
