Magento getUpSellProducts fatal error

Question

I'm trying to display upsell products on product page by getting upSellCollection as such:

$_product = Mage::registry('current_product')->getId();
$upsell_product = $_product->getUpSellProductCollection();

After this I'm getting:

Fatal error: Call to a member function getUpSellProductCollection() on a non-object

Any advice?

Answer 1

Fatal error: Call to a member function getUpSellProductCollection() on a non-object

This means your $_product is not an object but is a null type and you cannot call getUpSellProductCollection() function on null type.

If you are in product page then your $_product can be just like this:

$_product = $this->getProduct();

Check Mage_Catalog_Block_Product_View class

  /**
   * Retrieve current product model
   *
   * @return Mage_Catalog_Model_Product
   */
   public function getProduct()
   {
      if (!Mage::registry('product') && $this->getProductId()) {
          $product = Mage::getModel('catalog/product')->load($this->getProductId());
          Mage::register('product', $product);
       }
      return Mage::registry('product');
   }

Now you can get your up sell product like this:

$upsell_product = $_product->getUpSellProductCollection();