Magento 1.7 – Get Product Quantity in Cart After Adding Product

cartevent-observermagento-1.7quantity

I have built an observer which fires at checkout_cart_product_add_after. In the observer I set the quantity like this:

$item->setQty($quantity);

I would like to fetch the quantity that is already in the cart for that product, so that the quantity for the product gets updated instead or overwritten. Yet when I try to get the product quantity in the cart (Mage::helper('checkout/cart')), I get the "new" quantity, probably because the update quantity code has already fired.

How could I get the cart quantity for the product?

Thanks in advance,

Joost

EDIT:

This is the full code of the observer:

public function modifyPrice(Varien_Event_Observer $obs)
    {

        $item = $obs->getQuoteItem();
        $item = ( $item->getParentItem() ? $item->getParentItem() : $item );
        $price = $this->_getPrice($item);
        $item->setCustomPrice($price);
        $item->setOriginalCustomPrice($price);

        $quantity = $this->_getQuantity($item);
        $item->setQty($quantity);

        $item->getProduct()->setIsSuperMode(true);
    }

    protected function _getPrice(Mage_Sales_Model_Quote_Item $item)
    {
        $price = 0;

        Mage::app()->getRequest()->getPost();

        $qtydropdownbox = Mage::app()->getRequest()->getParam('qtydropdownbox');
        $prices = $item->getProduct()->getData('qty_dropdownbox_prices');
        $quantities = $item->getProduct()->getData('qty_dropdownbox_quantities');

        $array_prices = explode(';', $prices);
        $array_quantities = explode(';', $quantities);
        $price = $array_prices[$qtydropdownbox] / $array_quantities[$qtydropdownbox];

        return $price;
    }

    protected function _getQuantity(Mage_Sales_Model_Quote_Item $item)
    {
        $quantity = 0;

        Mage::app()->getRequest()->getPost();

        $qty = Mage::app()->getRequest()->getParam('qty');
        $qtydropdownbox = Mage::app()->getRequest()->getParam('qtydropdownbox');
        $quantities = $item->getProduct()->getData('qty_dropdownbox_quantities');

        $array_quantities = explode(';', $quantities);
        $quantity = $array_quantities[$qtydropdownbox] * $qty;

        return $quantity;
    }

Best Answer

I don't understand what you want to achieve, but to get the old quantity you are too late and even origData is overwritten (I think), but check it.

I think the easiest is to hook into quote_item_load_after and just add the qty to read it later like $quoteItem->setMyPersonalQty($quoteItem->getQty())

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