Product URL keys reset when saving product

Question

In our store, we are using custom product URL keys: {manufacturer}-{product-key}, so for example "lg-42lf580v".

Sometimes when I execute some code to update a few products from a script, the product URL key gets reset to the default value without the manufacturer in it, so: "42lf580v".

This only happens when I use the save() method on a product, for example:

$product = Mage::getModel('catalog/product')->loadByAttribute('sku', 'SKU');

if ($product) {                            
        // Update the price.
        $product->setSpecialPrice(200);

        // Set the stock to not allow backorders.
        $stockItem = Mage::getModel('cataloginventory/stock_item');
        $stockItem->assignProduct($product);
        $stockItem->setData('backorders', 0);
        $stockItem->save();

        $product->save();
    }

In this case, I only want to update the backorders value, but still the product URL key gets reset sometimes. Does anyone have any idea what I might be doing wrong here?

Answer 1

To make sure it doesn't happen you can save the URL key on each product save in your script

[...]
$product->setUrlKey($product->getUrlKey());
$product->setUrlKeyCreateRedirect(null);
[...]

That should do the trick