updateProductDetail example

    public function preUpdate(Enlight_Event_EventArgs $arguments)
    {
        /** @var Detail $orderDetail */
        $orderDetail = $arguments->get('entity');

        $entityManager = $arguments->get('entityManager');

        // returns a change set for the model, which contains all changed properties with the old and new value.         $changeSet = $entityManager->getUnitOfWork()->getEntityChangeSet($orderDetail);

        $this->stockService->updateProductDetail(
            $orderDetail,
            isset($changeSet['articleNumber']) ? $changeSet['articleNumber'][0] : null,
            isset($changeSet['quantity']) ? $changeSet['quantity'][0] : null,
            isset($changeSet['articleNumber']) ? $changeSet['articleNumber'][1] : null,
            isset($changeSet['quantity']) ? $changeSet['quantity'][1] : null
        );
    }

    /** * If an position is added, the stock of the product will be reduced by the ordered quantity. */