korbax · December 29, 2017 09:42
diff --git a/Set related products programatically Magento 2 b/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();
	$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();