/**
* @param Mage_Catalog_Model_Resource_Eav_Mysql4_Product_Collection $collection
* @param Morphes_Filters_Model_Filter_Attribute $model
* @return mixed
*/
public function countOnCollection($collection, $model)
{
$select = $collection->getSelect();
// reset columns, order and limitation conditions
$select->reset(Zend_Db_Select::COLUMNS);
$select->reset(Zend_Db_Select::ORDER);
$select->reset(Zend_Db_Select::GROUP);
$select->reset(Zend_Db_Select::LIMIT_COUNT);
$select->reset(Zend_Db_Select::LIMIT_OFFSET);
$connection = $this->_getReadAdapter();
$attribute = $model->getAttributeModel();
$tableAlias = $attribute->getAttributeCode() . '_idx';
$conditions = array("{$tableAlias}.entity_id = e.entity_id", $connection->quoteInto("{$tableAlias}.attribute_id = ?", $attribute->getAttributeId()), $connection->quoteInto("{$tableAlias}.store_id = ?", $model->getStoreId()));
$select->join(array($tableAlias => $this->getMainTable()), join(' AND ', $conditions), array('value', 'count' => "COUNT(DISTINCT {$tableAlias}.entity_id)"))->group("{$tableAlias}.value");
return $connection->fetchPairs($select);
}
