public function getObjectForProductAndParameter(Product $product, $param)
{
$q = $this->createQuery('c')->from('ParameterProductValue ppv')->where('ppv.Parameter.id = ? ', $param->getId())->addWhere('ppv.Product.id = ?', $product->getId());
$ppv = $q->fetchOne();
if (!$ppv) {
$ppv = new ParameterProductValue();
$ppv->setProduct($product);
$ppv->setParameter($param);
$ppv->setCommonValue('empty');
$ppv->save();
}
return $ppv;
}