Magento – Add Qty to Product before adding to cart

addtocartevent-observermagento-1.9

I am looking for an event observer which is suitable for my requirements.

My requirement is I add to cart the product but qty I want to add to this cart will be decided by the product attribute.

I will be having a custom attribute called attribute1 which will have an integer number.

So when I add to cart the product, I will get the attribute and number which is defined in it and I set this number as a qty to the product which is getting added to cart.

So following are the observers I tried, but not getting any success
checkout_cart_product_add_after and I am looking for event something like checkout_cart_product_add_before but it seems not their.

Please help me.

Best Answer

You could use the sales_quote_product_add_after event. You can access there the added quote items and change the quantity. Just be careful not to change the quantity for items that have a parent set (you can check if $item->getParentItem() is set).

Related Solutions

Magento – add product to cart and change price and weight

Try adding an observer for event event 'sales_quote_add_item':

<events>
    <sales_quote_add_item>
        <observers>
            <priceupdate_observer>
                <type>singleton</type>
                <class>mymodule/observer</class>
                <method>updatePrice</method>
            </priceupdate_observer>
        </observers>
    </sales_quote_add_item>
</events>

In your observer :

public function updatePrice($observer) {
    $event = $observer->getEvent();
    $quote_item = $event->getQuoteItem();

    $product = $quote_item->getProduct(); //You may need to load the product module or add the attribute to flat table
    $new_price = <insert logic>
    $quote_item->setOriginalCustomPrice($new_price);
    $quote_item->setWeight($newWeight);
    $quote_item->save();
}

See https://stackoverflow.com/questions/9721583/changing-the-price-in-quote-while-adding-product-to-cart-magento

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