How to remove item from quote in Magento?

Question

During the checkout process I sometimes want to programmatically remove items from the session's quote. So I tried this code:

$quote = Mage::getSingleton('checkout/session')->getQuote();
$all_quote_items = $quote->getAllItems();
foreach ($all_quote_items as $item) {
    $quote->removeItem($item->getId())->save();
}

However, after this loop the list of items in the $quote object is still the same, i.e. no items have been removed.

Any ideas what I am missing here?

Using Magento 1.4.1.1

Answer 1

Try

$cartHelper = Mage::helper('checkout/cart');
$items = $cartHelper->getCart()->getItems();        
foreach ($items as $item) 
{
   $itemId = $item->getItemId();
   $cartHelper->getCart()->removeItem($itemId)->save();
} 

See http://www.magentocommerce.com/boards/viewthread/30113/

Answer 2

In Magento 1.7.0.0 version, you can use:

Mage::getSingleton('checkout/cart')->truncate()->save();

Answer 3

I do a similar process while looking for items of a certain type, The logic I applied is:

$session= Mage::getSingleton('checkout/session');
$quote = $session->getQuote();

$cart = Mage::getModel('checkout/cart');
$cartItems = $cart->getItems();
foreach ($cartItems as $item)
{
    $quote->removeItem($item->getId())->save();
}

Try the above and if that fails I would start dumping the quote objects out before and after this logic is executed to see what differences there are.

Answer 4

Try the below code It will work

$product = $observer->getEvent()->getProduct();
$cart = Mage::getSingleton('checkout/cart');
foreach ($cart->getQuote()->getItemsCollection() as $_item) {
    if ($_item->getProductId() == $productId) {
            $_item->isDeleted(true);
    //Mage::getSingleton('core/session')->addNotice('This product cannot be added to shopping cart.');
        }
    }