I need to be able to programmatically update product stock in my Cron job. I have an array that contains both the SKU of the product needing updating and the Stock value of that product. How can I select a product by SKU and then update the stock?

1 Answer 1


I'm not sure about your data array which contains the SKU product and Stock value. So, I will use simple data.

We can update product stock via API:



        $objectManager = \Magento\Framework\App\ObjectManager::getInstance();

        //Our sample values
        $sku = '100098';
        $stockValue = 5;

        $productRepository = $objectManager->create('Magento\Catalog\Api\ProductRepositoryInterface');
        $stockRegistry = $objectManager->create('Magento\CatalogInventory\Api\StockRegistryInterface');

        //Load product by SKU
        $product = $productRepository->get($sku);
        //Need to load stock item
        $stockItem = $stockRegistry->getStockItem($product->getId());
        $stockItem->setData('qty',$stockValue); //set updated quantity


        $stockRegistry->updateStockItemBySku($sku, $stockItem);

You can quick test our code lines by using playground:

How can I bootstrap Magento 2 in a test.php script?


  • This looks like it would work, however I keep getting the "Class 'Magento\Framework\App\ObjectManager' not found" message.
    – opqr549
    Commented Aug 1, 2016 at 15:18
  • I have just update my code. Commented Aug 1, 2016 at 15:40
  • $objectManager=\Magento\Framework\App\ObjectManager::getInstance(); This is the line that is throwing the error.
    – opqr549
    Commented Aug 1, 2016 at 15:51
  • Tried to clear Magento Cache? How you test my code? Commented Aug 2, 2016 at 12:49
  • I am running the code in my cron job script located in Custom/Module/Cron/Script.php. Something tells me I am missing some sort of dependency injection or something like that. I have tried clearing the cache. Thank you for your help!
    – opqr549
    Commented Aug 2, 2016 at 19:16

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