I can't get a product attribute value

Question

I have a Mage_Sales_Model_Order_Shipment_Item object and I'm able to load a product model using the shipment item's sku (if I can get this attribute by just using the shipment item, all the better).

The loaded product model doesn't seem to contain the size attribute. When I var_dump($prod->getData()) or var_dump($prod) there is nothing about its size. The attribute's code is size. It is set on the product I am loading, it is global, Dropdown type, not unique, required. How can I get a specific product attribute, in this case "size", from a model loaded by sku?

$prod = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);
echo $prod->getSize();
echo $prod->getData('size');

Also, I would expect this to return a value of 57. It is a dropdown type attribute. How can I get the value for this option_id? For example, I'd like to get the value "small", not 57. Btw, I see these values set for this particular sku in the database.

I've tried this solution also

$pc = Mage::getResourceModel('catalog/product_collection')
    ->addAttributeToFilter('size', array('notnull' => 'true'))
    ->addAttributeToFilter('size', array('neq' => ''))
    //->addAttributeToFilter('sku', array('eq' => '100-0055-BLK-S'))
    ->addAttributeToSelect('size');
//$p = $pc->getFirstItem();
$usedAtts = array_unique($pc->getColumnValues('size'));
$attModel = Mage::getSingleton('eav/config')->getAttribute('catalog_product', 'size');
$usedAtts = $attModel->getSource()->getOptionText(implode(',', $usedAtts));
var_dump($usedAtts);

But $usedAtts is false.

Update: I tried the method in my first example, loading the product with sku, on a fresh install and it worked. I setup the size attribute just the same, except the new install has it in the 'default' attribute set, where the prior is a custom. I will try to look into those differences.. but in the meantime, anyone have an idea of why I can't get it in my prior install? I setup the products the same. In the prior, I can get the color attribute.. not sure why I can't get size.

Answer 1

The problem was that when I was initializing Magento it was defaulting to the "default" store view (go figure). I needed to set it to the admin store view, then I'm able to get all the product info I needed.

require 'app/Mage.php';
umask(0);
Mage::app();

//admin store
Mage::app()->setCurrentStore(0);

And this code now works just fine:

$prod = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);
echo $prod->getSize() . ' - ' . $prod->getAttributeText('size');

Answer 2

To answer the question:

Thanks to some handy built-in methods you don't have to do any loading on your own:

• Mage_Sales_Model_Order_Shipment_Item provides getOrderItem
• Mage_Sales_Model_Order_Item provides getProduct

So, all you should have to do is this:

$product = $shipmentItem->getOrderItem()->getProduct();

If size is persisted to the order item, you can do:

$item = $shipmentItem->getOrderItem();
echo $item->getAttributeText('size');

Or, if you need to load the ID value from the product itself, you can get all of the product's selected ID values:

$size = $shipmentItem->getOrderItem()->getProduct()->getSize();

Answer 3

Its easier to just pass this attribute to your quote and order. That way you can get it allover.

Add it to quote (in your config.xml from your extension)

<sales>
<quote>
    <item>
        <product_attributes>
            <custom_attribute />
        </product_attributes>
    </item>
</quote>

convert

<fieldsets>
    <sales_convert_quote_item>
        <custom_attribute>
            <to_order_item>*</to_order_item>
        </custom_attribute>
    </sales_convert_quote_item>
    <sales_convert_order_item>
        <custom_attribute>
            <to_quote_item>*</to_quote_item>
        </custom_attribute>
    </sales_convert_order_item>
</fieldsets>

Copy the attribute to quote

    <events>
            <sales_quote_item_set_product>
                <observers>
                    <yourmodule>
                        <class>yourmodule/observer</class>
                        <method>setCustomAttribute</method>
                    </yourmodule>
                </observers>
            </sales_quote_item_set_product>
   </events>

All these are under the global tag in your config.

Next you can copy your attribute to the quote trough the observer you just assigned the event to in your config:

public function setCustomAttribute(Varien_Event_Observer $observer) {
    $_item = $observer->getQuoteItem();
    $_product = $observer->getProduct();
    $_item->setCustomAttribute($_product->getCustomAttribute());
}

This way you won't have to load your product to get the value in your shippingmodel.

Answer 4

Just to add to these answers; if you need to get the attribute value, and you don't have the camel-case code available, you could use getData() on the product instead:

$product = $this->getProduct();
$attributeValue = $product->getData('attribute_code_here');