I have the following abridged code that I believe should assign a product to a grouped product; however when ran it doesn't create the assignment; that is - no entry is saved into the catalog_product_link table.

I've tried a few different ways (using the Data APIs/Interfaces) but have so far come up blank.

$obj = $this->_objectManager->create('\Magento\Catalog\Model\ProductFactory');

$product = $obj->create()->load(904); // productId of my grouped product

        "sku" => "group_sku",
        "link_type" => "associated",
        "linked_product_sku" => "simple_sku",
        "linked_product_type" => "simple",
        "position" => 1,
        "extension_attributes" => ["qty" => 1]


Does anyone have any suggestions as to where I'm going wrong / or has anyone got a working code example?

3 Answers 3


I had the same problem trying to create related, upsell, cross-sell. I ended using something this:

$q = $this->_objectManager->get('\Magento\Framework\App\ResourceConnection');
$q->getConnection('core_write')->query("insert into catalog_product_link (linked_product_id, product_id,link_type_id) values (".$linked_product_id.",".$product_id.",".$link_type_id.")");

not the best way, I'm sure, but it works!.

  • Only way that it work on grouped products for me.... Feb 4, 2019 at 16:47

The data looks right, but you need to create an array of \Magento\Catalog\Model\ProductLink\Link objects and then pass that to setProductLinks rather than the data array.

I gave a full code example here: https://stackoverflow.com/a/40529460/2828129


The code below worked for me.

 $associated = array();
$position = 0;

foreach($childrenIds as $productId) {

    $productRepository = $objectManager->create('\Magento\Catalog\Api\ProductRepositoryInterface');
    $linkedProduct = $productRepository->getById($productId);
    $productLink = $objectManager->create('Magento\Catalog\Api\Data\ProductLinkInterface');

    $associated[] = $productLink;



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