public function batchInsert($data, $runValidation=true)
    {
        foreach ($data as $key => &$attributes) {

            // Validation
            if ($runValidation && false===$attributes=$this->validate($attributes, true))
                return false; 

            $this->_attrEventBeforeInsert($attributes);
        }

        return $this->_db->insert_batch($this->table, $data);
    }