public function __construct($collection, $className = 'Phalcon\\Db\\Adapter\\Mongo\\Cursor', $query = [], $fields = [])
{
$ns = $collection->db->name . '.' . $collection->getName();
parent::__construct($collection->db->conn, $ns, $query, $fields);
$this->collection = $collection;
$this->className = $className;
}