How to check if Configurable Product is out of stock? - magento

Question

We all know that a configurable product in magento is associated with simple product.
If the simple products associated to the configurable product becomes Inventory = 0, it means that the configurable product is out of stock
So the question is how do i detect if Configurable Product is out of stock? i want to detect so I can display in front-end the "Out of Stock" text.
something like this
if($configurable_product->isOutOfStock()) {
echo "Out of Stock";
}
How can i do this in Magento?

Answer 1

if (!$configurable->isSaleable() ||$configurable_product->getIsInStock()==0){
// out of stock
}
For checking child simple product:
$allProducts = $configurable->getTypeInstance(true)
->getUsedProducts(null, $configurable);
foreach ($allProducts as $product) {
if (!$product->isSaleable()|| $product->getIsInStock()==0) {
//out of stock for check child simple product
}
}

Answer 2

$_productCollection = Mage::getResourceModel('catalog/product_collection')
->addAttributeToFilter('type_id', array('eq' => 'configurable'));
Mage::getSingleton('catalog/product_visibility')->addVisibleInCatalogFilterToCollection($_productCollection);
This shows only the configurable products that are in stock.

Answer 3

Just a slight update/correction to Quovadisqc's answer. When defining $qty it should be
$qty = $stockItem->getData('qty'); // correct
Instead of what's currently there,
$qty = $stockItem->setData('qty'); // incorrect
I'd post this as a comment but I don't have enough rep.

Answer 4

In the foreach loop of products the following if statement works.
if ($product->getIsInStock() === '1' && $product->isSaleable() === true) {
echo 'this product is in stock';
}

Answer 5

$product = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);
$stockItem = Mage::getModel('cataloginventory/stock_item')->loadByProduct($product->getId());
$qty = $stockItem->getData('qty');
$inStock = $stockItem->getData('is_in_stock');
if ($qty < 1 || $inStock == 0) {
// OutOfStock
}
I prefer to double check with qty since products won't always be out of stock on qty == 0 depending on config settings.