*/ class Child extends \Magento\Eav\Model\Entity\Attribute\Backend\AbstractBackend { /** * Set store id to the attribute * * @param \Magento\Framework\DataObject $object * @return $this */ public function beforeSave($object) { if ($object->getAddress()) { $object->setParentId($object->getAddress()->getId())->setStoreId($object->getAddress()->getStoreId()); } parent::beforeSave($object); return $this; } }