Get up-sell product in Magento 2

Question

I am trying to get up-sell product in Magento 2 via objectManager. Current product id and name is returning well but up-sell product return empty.

<?php 
    $objectManager = \Magento\Framework\App\ObjectManager::getInstance();
    $product = $objectManager->get('Magento\Framework\Registry')->registry('current_product');//get current product
    echo $product->getId();
    echo $product->getName();
    //echo $currentProduct->getSku();
if ($currentProduct = $product->getCurrentProduct()) {
    $upSellProducts = $currentProduct->getUpSellProducts();
    print_r($upSellProducts);

    if (!empty($upSellProducts)) {
        echo '<h3>UpSell Products</h3>';
        foreach ($upSellProducts as $upSellProduct) {
            echo $upSellProduct->getSku() . '<br />';        
        }
    }
}
?>

Answer 1

By Factory Method:

protected $_registry;

public function __construct(
    ...
    \Magento\Framework\Registry $registry,
    ...
) {
    $this->_registry = $registry;
}

public function getCurrentProduct()
{
    return $this->_registry->registry('current_product');
}

public function getUpsellProducts()
{
    $currentProduct = $this->getCurrentProduct();
    $upsellProducts = $currentProduct->getUpSellProducts();

    return $upsellProducts;
}

By ObjectManager:

<?php 
$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$currentProduct = $objectManager->get('Magento\Framework\Registry')->registry('current_product');//get current product

if ($currentProduct) {

    $upsellProducts = $currentProduct->getUpSellProducts();

    if (!empty($upsellProducts)) {
        echo '<h3>UpSell Products</h3>';
        foreach ($upsellProducts as $upsellProduct) {
            echo $id = $upSellProduct->getSku();
        }
    }
}

Note: With this code, you cannot get full model of product. For that, you need to load product model by upsell product Id.

Answer 2

$objectManager = \Magento\Framework\App\ObjectManager::getInstance();
$product = $objectManager->get('Magento\Framework\Registry')->registry('current_product');//get current product
echo $product->getId();
echo $product->getName();
//echo $currentProduct->getSku();
if ($currentProduct = $product) {
    $upSellProducts = $currentProduct->getUpSellProducts();
    //print_r($upSellProducts);

    if (!empty($upSellProducts)) {
        echo '<h3>UpSell Products</h3>';
        foreach ($upSellProducts as $upSellProduct) {
            echo $upSellProduct->getSku() . '<br />';        
        }
    }
}