Magento – How to get available quantity of product

addtocartmagento-1.9

I am adding products in cart programmatically. But whenever I enter quantity more than available, it gives me a 503 error. e.g. Lets say a product has 7 quantity saved in admin and out of 7, 3 is already added into cart. So now 4 quantity is available.
But if I try to add more than 4 it gives me 503 error.

Now I want to add a check for quantity before adding into the cart. Is it possible?

I am using below code to add product into cart.

$_product = Mage::getModel('catalog/product')->load(1);
        $cart = Mage::getModel('checkout/cart');
        $cart->init();
        $cart->addProduct($_product, array('qty' => 5);
        $cart->save();
        Mage::getSingleton('checkout/session')->setCartWasUpdated(true);

Best Answer

You are approaching your problem from the wrong angle.

I guess you are seeing a 500 error because of an uncaught exception. The quote and cart models throw exceptions if the product cannot be added to the cart.

Use try ... catch to catch this exception and react accordingly.

Example:

try {
    $cart->addProduct($_product, array('qty' => 5);
    $cart->save()
} catch (Mage_Core_Exception $e) {
    Mage::getSingleton('checkout/session')->addException($e, $this->__('Cannot add the item to shopping cart.'));
}

Related Solutions

Magento2 – Get Quantity of Product in Cart Without Loop

I don't fully understand your need, but I think I can help a bit.
this code

        foreach ($items as $item) {
            if ($item->getProductId() == $productId) {
              $quantityInCart = $quantityInCart + $item->getQty();
            }
        }

gets executed multiple times with the same result.
You can try to call it outside the other foreach loop like this:

$qtysInCart = [];
$items = $this->cart->getQuote()->getAllItems();
foreach ($items as $item) {
    $cartProductId = $item->getProductId();
    if (!isset($qtysInCart[$cartProductId])) {
        $qtysInCart[$cartProductId] = 0;
    }
    $qtysInCart[$cartProductId] += $item->getQty();
}

Now you should have an array with all the qtys in the cart for each product in the cart.

Now do the other loop:

foreach($products as $purchase){
    $productSku = $purchase['Sku'];
    $qty = $purchase['Quantity'];
    $loadedProduct = $this->getProductBySku($productSku);
    //rest of your code here except the other foreach
    //but instead of `if(($qty + $quantityInCart) > $productQty){` do this
    ...
    $productId = $loadedProduct->getId();
    if (isset($qtysInCart[$productId]) and $qty + $qtysInCart[$productId] > $productQty) {
         //error code in here
    }
}

Now the complexity will be O(n) instead of O(n^2). like you had before.
So for 200 products in the cart and adding 200 more you will get 200 + 200 checks instead of 200 * 200.

Note: I didn't test the code so watch out for typos.

Magento – How and where to change add to cart message in Magento 2

you can add it in your module's i18n/en_US.csv file

"The requested qty is not available","here your custom message"

Deploy the static content and check

Best Answer

Example:

Related Solutions

Magento2 – Get Quantity of Product in Cart Without Loop

Magento – How and where to change add to cart message in Magento 2

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