How to update salable quantity of product from admin or programmatic in magento 2.3?

Question

I have got salable salable quantity of product in magento 2.3 using object manager.

But we need to update quantity by programmatic or admin.

$getSalableQuantityDataBySku = $this->objectManager->create('\Magento\InventorySalesAdminUi\Model\GetSalableQuantityDataBySku');

$salable = $getSalableQuantityDataBySku->execute($sku);
                print_r($salable);

Output like in below :

    Array
    (
        [0] => Array
            (
                [stock_name] => Default Stock
                [qty] => 0
                [manage_stock] => 1
            )

)

Answer 1

This is verified in Magento 2.3.2

public function __construct(
    \Magento\CatalogInventory\Api\StockRegistryInterface $stockRegistry
)
{
    $this->stockRegistry = $stockRegistry;
    parent::__construct();
}

public function yourMethod() {
    $sku = 'ABC123';
    $qty = 10;
    $stockItem = $this->stockRegistry->getStockItemBySku($sku);
    $stockItem->setQty($qty);
    $stockItem->setIsInStock((bool)$qty); // this line
    $this->stockRegistry->updateStockItemBySku($sku, $stockItem);
}

Update Stock using ObjectManager

Create a sandbox script PHP file in magento root dir and add below code

require __DIR__ . '/app/bootstrap.php';
$bootstrap = \Magento\Framework\App\Bootstrap::create(BP, $_SERVER);
$objectManager = $bootstrap->getObjectManager();

$sku = 'demo';
$qty = 10;
$_sourceItemsSaveInterface = $objectManager->get('\Magento\InventoryApi\Api\SourceItemsSaveInterface');
$_sourceItemFactory = $objectManager->get('Magento\InventoryApi\Api\Data\SourceItemInterfaceFactory');
$sourceItem = $_sourceItemFactory->create();
$sourceItem->setSourceCode('default'); // default : stock source
$sourceItem->setSku($sku);
$sourceItem->setQuantity($qty);
$sourceItem->setStatus(1);
$_sourceItemsSaveInterface->execute([$sourceItem]);