Maximum Qty Allowed in Wishlist

Question

Is there a way to restrict the quantity in the wishlist to 1 similar to how you can for the cart? I will only ever have one of any item however if the customer clicks add to wishlist multiple times on the item it increases the quantity for that item.

Thanks in advance.

Answer 1

You have to override magento wishlist IndexController.

for override wishlist in IndexController refer Question

Just put below function in it.

Use _addItemToWishList()

public function _addItemToWishList()
{
    $wishlist = $this->_getWishlist();
    if (!$wishlist) {
        return $this->norouteAction();
    }

    $session = Mage::getSingleton('customer/session');

    $productId = (int)$this->getRequest()->getParam('product');
    if (!$productId) {
        $this->_redirect('*/');
        return;
    }

    $product = Mage::getModel('catalog/product')->load($productId);
    if (!$product->getId() || !$product->isVisibleInCatalog()) {
        $session->addError($this->__('Cannot specify product.'));
        $this->_redirect('*/');
        return;
    }

    //*******************Check if already exist****************

    $customer = $session->getCustomer();
    $already_exist=false;
    if($customer->getId())
    {
        $wishlist = Mage::getModel('wishlist/wishlist')->loadByCustomer($customer, true);
        $wishListItemCollection = $wishlist->getItemCollection();
        foreach ($wishListItemCollection as $item)
        {
            if($item->getId()==$productId)
            {
                $already_exist=true;
                break;
            }
        }
    }
    if($already_exist)
    {
        $session->addError($this->__('%s already exist in wishlist: %s', $product->getName()));
        $this->_redirect('*/');
        return;
    }

    //******************************************************

    try {
        $requestParams = $this->getRequest()->getParams();
        if ($session->getBeforeWishlistRequest()) {
            $requestParams = $session->getBeforeWishlistRequest();
            $session->unsBeforeWishlistRequest();
        }
        $buyRequest = new Varien_Object($requestParams);

        $result = $wishlist->addNewItem($product, $buyRequest);
        if (is_string($result)) {
            Mage::throwException($result);
        }
        $wishlist->save();

        Mage::dispatchEvent(
            'wishlist_add_product',
            array(
                'wishlist' => $wishlist,
                'product' => $product,
                'item' => $result
            )
        );

        $referer = $session->getBeforeWishlistUrl();
        if ($referer) {
            $session->setBeforeWishlistUrl(null);
        } else {
            $referer = $this->_getRefererUrl();
        }

        /**
         *  Set referer to avoid referring to the compare popup window
         */
        $session->setAddActionReferer($referer);

        Mage::helper('wishlist')->calculate();

        $message = $this->__('%1$s has been added to your wishlist. Click <a href="%2$s">here</a> to continue shopping.',
            $product->getName(), Mage::helper('core')->escapeUrl($referer));
        $session->addSuccess($message);
    } catch (Mage_Core_Exception $e) {
        $session->addError($this->__('An error occurred while adding item to wishlist: %s', $e->getMessage()));
    }
    catch (Exception $e) {
        $session->addError($this->__('An error occurred while adding item to wishlist.'));
    }

    $this->_redirect('*', array('wishlist_id' => $wishlist->getId()));
}