I was speaking to a client in Bristol who needed a freelance Magento developer to make some changes to their site. Top of the list was to modify the main navigation so that a category would only show if it contained active products, or sub categories with active products.
To cut a very long story short, if you override or subclass Mage_Catalog_Block_Navigation you can do this fairly quickly. Add the method _hasProducts as shown below, then you need to call this inside the renderCategoriesMenuHtml() and _renderCategoryMenuItemHtml() methods…
/**
* Check if a product has an active products
* @param int $category_id
* @return boolean
*/
private function _hasProducts( $category_id )
{
$products = Mage::getModel('catalog/category')->load($category_id)
->getProductCollection()
->addAttributeToSelect('entity_id')
->addAttributeToFilter('status', 1)
->addAttributeToFilter('visibility', 4);
/* @var $products Mage_Catalog_Model_Resource_Eav_Mysql4_Product_Collection */
return ( $products->count() > 0 ) ? true : false;
}
Then modify the 2 methods below…
protected function _renderCategoryMenuItemHtml()
{
//snip a whole load of code until you reach the first foreach loop
foreach ($children as $child) {
if ( $child->getIsActive() ) {
if( $child->hasChildren() ) {
$activeChildren[] = $child;
}else{
if( $this->_hasProducts( $child->entity_id ) ) {
$activeChildren[] = $child;
}
}
}
//don't change the rest of the method...
}
public function renderCategoriesMenuHtml()
{
//snip a whole load of code until you reach the first foreach loop
foreach ($this->getStoreCategories() as $child) {
/* @var $child Varien_Data_Tree_Node */
if ( $child->getIsActive() ) {
if( $child->hasChildren() ) {
$activeCategories[] = $child;
}else{
if( $this->_hasProducts( $child->entity_id ) ) {
$activeCategories[] = $child;
}
}
}
}
//don't change the rest of the method...
}
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