Magento: Increase “Qty” upon cancel a shipped order

Question

I\'m on Magento 1.7.0.2. I\'m using \"Cash On Delivery\" as my payment method.I\'ll tell you exactly the steps That i follow on any order. When an order is placed(Qty decrea

Answer 1

Thanks to R.S as he helped me more & more.

I followed all instructions on R.S's reply https://stackoverflow.com/a/13330543/1794834 and I've only changed the observer code. Here is the observer code that worked with me on Magento 1.7.0.2.

$curr_date = date('Y-m-d H:i:s');
$order = $observer->getEvent()->getOrder();

foreach ($order->getItemsCollection() as $item) 
{ 
    $productId  = $item->getProductId();
    $qty = (int)$item->getQtyOrdered();
    $product = Mage::getModel('catalog/product')->load($productId);
    $stock_obj = Mage::getModel('cataloginventory/stock_item')->loadByProduct($productId);
    $stockData = $stock_obj->getData();
    $product_qty_before = (int)$stock_obj->getQty();
    $product_qty_after = (int)($product_qty_before + $qty); 
    $stockData['qty'] = $product_qty_after;
    /*
     * it may be case that admin has enabled product add in stock, after product sold,
     * he set is_in_stock = 0 and if order cancelled then we need to update only qty not is_in_stock status.
     * make a note of it
     */
    if($product_qty_after != 0) {
        $stockData['is_in_stock'] = 1;
    }else{
        $stockData['is_in_stock'] = 0;
    }

    $productInfoData = $product->getData();
    $productInfoData['updated_at'] = $curr_date;
    $product->setData($productInfoData);
    $product->setStockData($stockData);
    $product->save();
}