Model

<?php

    class PaypalTransaction extends DataObject {

        private static $db = array(
            'CustomerName' => 'Varchar',
            'Total' => 'Int',
            'Status' => "Enum('Initiated,CustomerApproved,PaymentSuccess,ApprovalFailed,VerifyFailed')",
            'OrderId' => 'Int',
            'UpdatedAt' => 'SS_Datetime',
            'CreatedAt' => 'SS_Datetime',
        );

         private static $has_one = array(
            'Order' => 'Order',
        );
    }