How can I import related products into Magento 1.9.1.0

Question

9.1.0 and when importing related products the file seems to run and then we get no information and the related products field has not imported.

Answer 1

If you're using Dataflow, follow this link: How to import related products in normal import process?

If you're doing it programmatically, you'll need to do this.

$data = array(
    product_id_1 => array(
        'position' => $position1
    ),
    product_id_2 => array(
        'position' => $position2
    ),
    // etc...
);
$product->setRelatedLinkData($data)
    ->save();