Question

We use this Magento code to get a list of publications to pick 2 from to show in a Bookstore section.

$collection = Mage::getModel('catalog/category')->getCollection();
$collection->addAttributeToSelect('url_key')
    ->addAttributeToSelect('name')
    ->addAttributeToSelect('id')
    ->addAttributeToSelect('description')
    ->addAttributeToSelect('is_anchor')
    ->addAttributeToFilter('is_active', 1)
    ->joinUrlRewrite()
    ->load();

How can I add an attribute to select to make it not include the publications that are set
to “Not show individually”?

If I add this:

->addAttributeToFilter('visibility', 4) // Only catalog, search visiblity

The code fails with message ‘Invalid attribute name: visiblity’

Answer 1

Visibility is a product attribute, not a category attribute. To get products that only have a visibility of 4, you need to get a product collection and traverse over it to get a definitive list of categories:

$categories = array();
$products = Mage::getModel('catalog/product')->getCollection()->addAttributeToFilter('visibility', 4);
foreach($products as $product){ 
  foreach($product->getCategoryIds() as $cat){
     $categories[] = $cat;
  }
}

$categories = array_values(array_unique($categories));

Now, with the $categories array populated with our unique list of categories, we can load only those categories:

$cat = Mage::getModel('catalog/category')->getCollection()->addIdFilter($categories);