Magento 2: get Stock quantity from custom source

Question

I use this code to retrieve stock quantity by product id.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$StockState = $objectManager->get('\Magento\CatalogInventory\Api\StockStateInterface');
$qty = $StockState->getStockQty($product->getId(), $product->getStore()->getWebsiteId());

This snippet returns only "default source" quantity. My goal consist to retrieve "mycustom source" quantity such as:

Is it possible?

Answer 1

Sure. See below codes:

<?php
namespace YourNameSpace;

use Magento\InventoryApi\Api\SourceItemRepositoryInterface;
use Magento\Framework\Api\SearchCriteriaBuilder;


class YourClass
{
    /**
     * @var SourceItemRepositoryInterface
     */
    protected SourceItemRepositoryInterface $sourceItems;

    /**
     * @var SearchCriteriaBuilder
     */
    protected SearchCriteriaBuilder $searchCriteriaBuilder;


    /**
     * @param SourceItemRepositoryInterface $sourceItems
     * @param SearchCriteriaBuilder $searchCriteriaBuilder
     */
    public function __construct(
        
        SourceItemRepositoryInterface $sourceItems,
        SearchCriteriaBuilder $searchCriteriaBuilder
    ){
        $this->sourceItems = $sourceItems;
        $this->searchCriteriaBuilder = $searchCriteriaBuilder;
    }


    public function yourFunction() {
            //Set source
            $sku = $product->getSku();
            $searchCriteria = $this->searchCriteriaBuilder
                ->addFilter('sku', $sku)
                ->create();
            $sourceItemData = $this->sourceItems->getList($searchCriteria);
            foreach ($sourceItemData->getItems() as $sourceItem){
                //Get source qty
                $sourceItem->getQuantity()
                //Get source code
                $sourceItem->getSourceCode();
            }
        }
    }
}

You just need to provide SKU, and then you will get 8 from MyCustom Source and 47 from Default Source. I simplified the codes to be a more readable form, please modify it when you use them.