Set related products programatically Magento 2

Set related products programatically Magento 2

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

        /** @var \Magento\Catalog\Model\Product $product */
        $productObject = $obj->get('Magento\Catalog\Model\Product');

        $product = $productObject->loadByAttribute('sku', 'Test Test');

        $linkDataAll = [];
        $skuLinks = "0012365,test1233,789456";
        $skuLinks = explode(",",$skuLinks);

        foreach($skuLinks as $skuLink) {
            //check first that the product exist
            $linkedProduct = $productObject->loadByAttribute("sku",$skuLink);
            if($linkedProduct) {
                /** @var  \Magento\Catalog\Api\Data\ProductLinkInterface $productLinks */
                $productLinks = $obj->create('Magento\Catalog\Api\Data\ProductLinkInterface');
                $linkData = $productLinks //Magento\Catalog\Api\Data\ProductLinkInterface
                    ->setSku($product->getSku())
                    ->setLinkedProductSku($skuLink)
                    ->setLinkType("related");
                $linkDataAll[] = $linkData;
            }

        }
        if($linkDataAll) {
            print(count($linkDataAll)); //gives 3
            $product->setProductLinks($linkDataAll);
        }
//        $product->save();

Hi there, do you know where can i put and run this code? Thank you

Nice, thanks

catalog_product_link_attribute_int table is not updating using above code. Ii fixed that issue. So please use below code....
$linkDataAll = [];
$skuLinks = "0012365,test1233,789456";
$skuLinks = explode(",",$skuLinks);

            foreach($skuLinks as $n => $skuLink) {
                //check first that the product exist

                try {
					echo '<br /> linked  = '.$skuLink;
                    $linkedProduct = $productRepository->get($skuLink);
                } catch (\Magento\Framework\Exception\NoSuchEntityException $e){
                    echo '<br />'.$skuLink.'   '.$e->getMessage();
                    \Magento\Framework\App\ObjectManager::getInstance()->create(\Psr\Log\LoggerInterface::class)->info('sku not exist : '.$sku);

                    $linkedProduct = false;
                }

                if($linkedProduct && $skuLink != $product->getSku()) {
                    /** @var  \Magento\Catalog\Api\Data\ProductLinkInterface $productLinks */
                    $productLinks = $obj->create('Magento\Catalog\Api\Data\ProductLinkInterface');
                    $linkData = $productLinks //Magento\Catalog\Api\Data\ProductLinkInterface
                        ->setSku($product->getSku())
                        ->setLinkedProductSku($skuLink)
                        //->setLinkType("matchingfaucets");
                        ->setLinkType($type)
                        ->setPosition($n + 1);
                    $linkDataAll[] = $linkData;
                }

            }
            if($linkDataAll) {
                print(count($linkDataAll)); //gives 3
                $product->setProductLinks($linkDataAll);
            }
            $product->save();

Using $product->save(); is deprecated and should be avoided. You should use the ProductRepositoryInterface to save the product.

And ofcourse, using the ObjectManager is bad behavior and should not be used on production environments.

Hi,
This code is working for me but when I added the related products with this code. Other up-sell and cross-sell removed issues. When I added the related, cross-sell, and up-sell together then only the last value inserted in the product.
Can you please guide me?

Hi,
This code is working for me but when I added the related products with this code. Other up-sell and cross-sell removed issues. When I added the related, cross-sell, and up-sell together then only the last value inserted in the product.
Can you please guide me?

pls use class Magento\Catalog\Api\Data\ProductLinkInterfaceFactory instead of Magento\Catalog\Api\Data\ProductLinkInterface