Magento – Fix Category Filters Not Appearing in Layered Navigation

cataloglayered-navigation

Category filters are not appearing in Layered Navigation. I am not using any plugin for layered navigation. Attribute and Price filters are appearing.

I have set Is Anchor and Show In Navigation to YES for all the categories. I have read other answers on stackexchange as well. No idea why this is happening.

In app/code/core/Mage/Catalog/Block/Layer/View.php (Line 207)

return $this->getChild('category_filter'); is returning NULL.

Best Answer

Thanks Cags! I did a whole search and found out, one of the xml files was removing the category_filter by the unsetChild method. Thanks a ton.

So the answer is, if you stumble upon such errors, do a full file search with the block name, and you will find the culprit "xml" file which may be removing the block forcefully.

In my case this happened:

<catalog_category_layered>
        <reference name="catalog.leftnav">
            <action method="unsetChild"><name>category_filter</name></action>
        </reference>
</catalog_category_layered>

Related Solutions

Magento – Layered navigation filters for grouped products only

You need to rewrite how Mage_Catalog_Model_Layer builds the attribute collection using the current product collection's attribute sets:

protected function _getSetIds()
{
    $key = $this->getStateKey().'_SET_IDS';
    $setIds = $this->getAggregator()->getCacheData($key);

    if ($setIds === null) {
        $setIds = $this->getProductCollection()->getSetIds();
        $this->getAggregator()->saveCacheData($setIds, $key, $this->getStateTags());
    }

    return $setIds;
}

For this context, you'll want to check the product collection for grouped products and return the attribute set IDs of grouped children. These are then evaluated in getFilterableAttributes():

public function getFilterableAttributes()
{
    $setIds = $this->_getSetIds();
    if (!$setIds) {
        return array();
    }
    /** @var $collection Mage_Catalog_Model_Resource_Product_Attribute_Collection */
    $collection = Mage::getResourceModel('catalog/product_attribute_collection');
    $collection
        ->setItemObjectClass('catalog/resource_eav_attribute')
        ->setAttributeSetFilter($setIds)
        ->addStoreLabel(Mage::app()->getStore()->getId())
        ->setOrder('position', 'ASC');
    $collection = $this->_prepareAttributeCollection($collection);
    $collection->load();

    return $collection;
}

You will likely need to deal with the cache key. I would develop with block caching off and then test extensively with it on.

Magento – layered navigation filters

So you want to remove all filters from your URL. The block that does that is Mage_Catalog_Block_Layer_State with the method

public function getClearUrl()
{
    $filterState = array();
    foreach ($this->getActiveFilters() as $item) {
        $filterState[$item->getFilter()->getRequestVar()] = $item->getFilter()->getCleanValue();
    }
    $params['_current']     = true;
    $params['_use_rewrite'] = true;
    $params['_query']       = $filterState;
    $params['_escape']      = true;
    return Mage::getUrl('*/*/*', $params);
}

which in turn uses

public function getActiveFilters()
{
    $filters = $this->getLayer()->getState()->getFilters();
    if (!is_array($filters)) {
        $filters = array();
    }
    return $filters;
}

So it iterates over all set filters and unsets them in the query. You could do it exactly like this also from the filter block. Or you can try to access the state block and call the getCleanUrl() method.

Best Answer

Related Solutions

Magento – Layered navigation filters for grouped products only

Magento – layered navigation filters

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