Magento2: Calling upsell block from phtml is not working.

Question

I want get up-sell product block. when I am working with XML script block is working. but when I am trying to this in .phtml file it's showing nothing .I do not what is wrong with .phtml and XML data is working good .

step1: For xml this code working good

<block class="Magento\Catalog\Block\Product\ProductList\Upsell" name="product.info.upsell" template="Magento_Catalog::product/list/items.phtml" after="product.info.media.video">
    <arguments>
       <argument name="type" xsi:type="string">upsell</argument>
    </arguments>
</block>

Step:2 for .phtml file this code is showing blank

 <?php echo $block->getLayout()->createBlock('Magento\Catalog\Block\Product\ProductList\Upsell')->setTemplate('Magento_Catalog::product/list/items.phtml')->toHtml();?>

Answer 1

use above code in phtml file:-

<?php echo $this->getLayout()->createBlock("Magento\Catalog\Block\Product\ProductList\Upsell")->setTemplate("Magento_Catalog::product/list/items.phtml")->toHtml();?>

Answer 2

We can not call upsell block this way from phtml file. Because upsell products are associated with a product.

It will working fine when calling from xml because it retuns upsell products for current product.

If you want to get upsell products from current product then you can try below code:

<?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) {
                $productId = $upSellProduct->getId();
                $product = $objectManager->create('Magento\Catalog\Model\Product')->load($productId); 
                echo $product->getName().'<br />';
                echo $product->getSku().'<br />';
                echo $product->getProductUrl().'<br />';
                echo $product->getImage().'<br />';        
            }
        }

     }
?>

Answer 3

From the thread at Notice: Undefined variable: exist in Magento 2 when using upsell block

echo $this->getLayout()
->createBlock('Magento\Catalog\Block\Product\ProductList\Upsell')
->setData('type', 'upsell')
->setTemplate('Magento_Catalog::product/list/items.phtml')
->toHtml();

So the key is ->setData('type', 'upsell')