In Item.php file in app/code/core/Mage/CatalogInventory/Model/Stock/ there is the function

checkQuoteItemQty($qty, $summaryQty, $origQty = 0) ...

What is different in qty parameter and summaryQty parameter.

1 Answer 1


If you check the function itself, you will find the description of the parameters just above the function.

 * Checking quote item quantity
 * Second parameter of this method specifies quantity of this product in whole shopping cart
 * which should be checked for stock availability
 * @param mixed $qty quantity of this item (item qty x parent item qty)
 * @param mixed $summaryQty quantity of this product
 * @param mixed $origQty original qty of item (not multiplied on parent item qty)
 * @return Varien_Object

So, here $summaryQty is the total number of current product in whole cart. It will consist of all the instances of current product in different parent products.

Suppose you have a simple product added in multiple parent products like in configurable product, in bundle product or in grouped product and a customer buys one from configurable product and one from bundle product, $summaryQty will be the quantity of current simple product from both the parent products.

If the value of $summaryQty exceeds total number of available quantity of the product, it will display error message by below code

if (!$this->checkQty($summaryQty) || !$this->checkQty($qty)) {
    $message = Mage::helper('cataloginventory')->__('The requested quantity for "%s" is not available.', $this->getProductName());
    return $result;
  • I have add last 1 product qty in cart but when place order it show error. Requested qty is not available. The summaryQty value is 2 when place order. Please suggest me how to fix this issue. Thanks Commented Sep 6, 2017 at 4:58
  • Do you have only one product in cart? Or there is any other product added in cart? Commented Sep 6, 2017 at 5:01
  • Yes I have added only one product in cart and it's stock qty is only one. But when place order on frontend it's showing error. Commented Sep 6, 2017 at 5:11
  • @RakeshPatidar, did you try creating a new product with qty 1 and adding the same in cart? Commented Sep 11, 2017 at 9:35

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