I have created an extension that creates product attribute "Is Old" after installing extension. Attribute is in drop down form with Yes and No.

Attribute value is saving in "catalog_product_entity_int" table.

The main purpose of creating this attribute is that admin can decide if current product is old or not.

Now I want to fetch all those product's entity id that is set to "YES" in "Is Old" drop down value and by specific SKU.

I have fetched product's entity id by SKU but now I want to fetch entity id by sku and is_old value "Yes" as well.

Here is my code to fetch product entity id by SKU only.

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$resource = $objectManager->get('Magento\Framework\App\ResourceConnection');
$connection = $resource->getConnection();

$select = "Select * FROM catalog_product_entity WHERE sku='123'";
$rowArray = $connection->fetchRow($select);
$enitity_id = $rowArray['entity_id'];

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3 Answers 3


I don't understand why are you fetching a product id by filtering with SKU and is_old attribute. Because SKU is already an unique value.

I am posting my answer here with two different cases.

Case 1: Get product Id using sku.


$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$productId = $objectManager->get('Magento\Catalog\Model\Product')->getIdBySku('your_sku');


Case 2: Get old products using sku.


$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$products = $objectManager->get('Magento\Catalog\Model\Product')

echo "<pre>";

  • I need same in Magento 2.1.9 version. Can you please help.
    – Sharma
    Nov 9, 2017 at 9:22
  • it works for me,please use "\Magento\Framework\App\ObjectManager::getInstance();" instead of " Magento\Framework\App\ObjectManager::getInstance();" May 24, 2019 at 9:50

Instead of calling direct query, my suggestion is to get Magento collection by using product collection factory class:


Then filter that collection via addAttributeTofilter

namespace [YourClassNameSpace];
class [ClasssName]
     protected $_productCollectionFactory;

    public function __construct(
        \Magento\Catalog\Model\ResourceModel\Product\CollectionFactory $productCollectionFactory,
    ) {
        $this->_productCollectionFactory = $productCollectionFactory;

      public function  getProductCollection(){

         $collection = $this->_productCollectionFactory->create();
         // Assume tghat yes/no attribute code
         $collection->addAttributeToFilter('Is Old_ATTRIBUTE_CODE',1); //Use 1 for yes value
         /* Filter collection by multiple sk */



You can also get the product id via SKU by using this class:


protected $_productCollection;

public function __construct(
\Magento\Catalog\Model\Product $productCollection,
$this->_productCollection = $productCollection;

public function getProductIdBySku() {
        $sku = "your_sku";
        $productId = $this->_productCollection->getIdBySku($sku);

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