I want to add a stock filter for the product search GraphQl query. check below my code


input ProductAttributeFilterInput @doc(description: "Defines the filters"){
    stock_status: FilterEqualTypeInput


   <virtualType name="Magento\Catalog\Model\Api\SearchCriteria\CollectionProcessor\ProductFilterProcessor" type="Magento\Eav\Model\Api\SearchCriteria\CollectionProcessor\FilterProcessor">
            <argument name="customFilters" xsi:type="array">
                <item name="stock_status" xsi:type="object">Custom\Module\Model\Resolver\Products\SearchCriteria\CollectionProcessor\FilterProcessor\CustomStockFilter</item>


namespace Custom\Module\Model\Resolver\Products\SearchCriteria\CollectionProcessor\FilterProcessor;

use Magento\Catalog\Model\ResourceModel\Product\Collection;
use Magento\Framework\Api\Filter;
use Magento\Framework\Api\SearchCriteria\CollectionProcessor\FilterProcessor\CustomFilterInterface;
use Magento\Framework\Data\Collection\AbstractDb;

class CustomStockFilter implements CustomFilterInterface

    private $logger;
    private $stock;

    public function __construct(
        \Psr\Log\LoggerInterface $logger,
        \Magento\CatalogInventory\Helper\Stock $stock
    ) {
        $this->logger = $logger;
        $this->stock = $stock;

     * Apply filter by 'category_id' to product collection.
     * For anchor categories, the products from all children categories will be present in the result.
     * @param Filter $filter
     * @param AbstractDb $collection
     * @return bool Whether the filter is applied
    public function apply(Filter $filter, AbstractDb $collection)
        $this->logger->info('stock filter log');
        $conditionType = $filter->getConditionType();
        $value = $filter->getValue();
        return true;


GraphQL Query

    search: "test"
    filter: { stock_status: { in: ["1"] } }
  ) {
    items {

I added a logger in the resolver file but the resolver is not triggered. my Magento ver. 2.4.4-p1.

how to add in-stock/outstock filter in product search query.

stock_status I added a custom field but its not working

please help me on this

  • For now Igonre file trigger or not but just confirm as per your attribute value products data returns or not? Like this image: prnt.sc/Vc6iTdsFpN1M Feb 26 at 12:14
  • no its not return
    – Devidas
    Feb 26 at 12:48
  • Have you created attributes by admin or script? Feb 26 at 12:54
  • by admin added the attributes
    – Devidas
    Feb 27 at 6:07
  • So you need to configure attribute like this: prnt.sc/mw6vZWkXLb11 Feb 27 at 11:33


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