filtering product collection on "is_salable"

I would like to filter a product collection to show only items that are in stock. I thought this would be easy given that there's an attribute called 'is_salable' that is 1 (true) if it's in stock, 0 (false) if not. But no matter what I do, it doesn't work. Further, it seems to halt the execution of the query before it finishes.

Here's some sample code:

$this->_productCollection = Mage::getModel('catalog/product')->getCollection();
$this->_productCollection->addAttributeToSelect('*');
$this->_productCollection->addAttributeToFilter('my_attribute', true);
//So far, so good...filtering on 'my_attribute' works!
Mage::Log("select: " . $this->_productCollection->getSelect());
//Successfully outputs the SQL query
$this->_productCollection->addFieldToFilter('is_salable', '1');
Mage::Log("select: " . $this->_productCollection->getSelect());
//does NOT output any query...it's like it died trying

So what am I doing wrong? I've tried 'addFieldToFilter', 'addAttributeToFilter', and miscellaneous other queries, such as: addFieldToFilter('is_salable', array('eq' => true)), etc...

Anyone know how to do this? If 'is_salable' is not the answer, all I need to do is filter out products that are not in stock...so whatever works to do that would be fine :开发者_Go百科)

Thanks!

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There is no is_salable attribute in the product so it will rise an exception. If you want to display only products that are in stock, use this stock model addInStockFilterToCollection method:

Mage::getSingleton('cataloginventory/stock')->addInStockFilterToCollection($this->_productCollection);

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try this as well...

$stockCollection = Mage::getModel('cataloginventory/stock_item')->getCollection()->addFieldToFilter('qty', array('gteq' => 1))->addFieldToFilter('type_id', 'simple');

addFieldFilter ('qty',array('gteq' =>1))

get all products collection that have a stock of 1 or greater, you can put any number here according to your needs

addFieldToFilter('type_id', 'simple')

filter by simple products

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I stumbled upon the problem that isSaleable() always returns false on my products, the problem was that I was getting the collection but didn't add the attribute price to the collection. In the isSaleable() function there is a check to make sure the price isn't 0, it needs the price attribute to check that so:

Changing:

$collection = Mage::getModel('catalog/product')->getCollection();
        $collection->addAttributeToSelect('name')
                ->addAttributeToSelect('image')
                ->addAttributeToSelect('url_path')
                ->addAttributeToSelect('status')
                ->addUrlRewrite();

To:

$collection = Mage::getModel('catalog/product')->getCollection();
        $collection->addAttributeToSelect('name')
                ->addAttributeToSelect('image')
                ->addAttributeToSelect('price')
                ->addAttributeToSelect('url_path')
                ->addAttributeToSelect('status')
                ->addUrlRewrite();

Did the trick :)