Pake AR sama CDbCriteria

$criteria = new CDbCriteria();
if($filter == 'kosong') {
    if($voucherfilter == 'NOTUSED') {
        $criteria->compare('merchant_code_exp', 0);
    } else {
        $criteria->compare('merchant_code_exp', 1);
    }
} else {
    if($voucherfilter == 'NOTUSED') {
        $criteria->compare('merchant_id', $filter);
        $criteria->compare('merchant_code_exp', 0, true, 'AND');
    } else {
        $criteria->compare('merchant_id', $filter);
        $criteria->compare('merchant_code_exp', 1, true, 'AND');
    }
}

$criteria->order = 'id ASC';
$criteria->limit = 3;
$model = MerchantBatchCode::model()->findAll($criteria);