Question

I have created my own payment method by taking reference of another method. I wannt to store my payment gateway’s transaction id to order payment details (sales/order_payment) on successful payment action.

How can I store transaction id to this table ?

Answer 1

1) Add an SQL install script to your module, where we will add a new attribute to the order object

$installer = new Mage_Sales_Model_Mysql4_Setup;
$attribute  = array(
        'type'          => 'text',
        'backend_type'  => 'text',
        'frontend_input' => 'text',
        'is_user_defined' => true,
        'label'         => 'Transaction Code',
        'visible'       => true,
        'required'      => false,
        'user_defined'  => false,  
        'searchable'    => false,
        'filterable'    => false,
        'comparable'    => false,
        'default'       => ''
);
$installer->addAttribute('order', 'new_transaction_id', $attribute);
$installer->endSetup();

you could then add a observer to hook the payment event, so you would need to add code to yoru config.xml to enable your observer to hook onto the event:

<events>
   <sales_order_payment_pay>
      <observers>
        <my_observer>
            <type>singleton</type>
            <class>mymodule/observer</class>
            <method>save_transaction</method>
        </my_observer>
      </observers>
   </sales_order_payment_pay>     
</events>

You would then add an observer model to your module:

<?php
class Company_Mymodule_Model_Observer
{
    public function save_transaction($event)
    {
        $order = $event->getInvoice()->getOrder(); // Mage_Sales_Model_Order

        /**
         * You would need to have your tranaction id from your gateway
         * which would depend on how you have made your module..
         * ....
         */
        try {
            $order->setNewTransactionId($transactionId);
            $order->save();
        }
        catch(Exception $e) {
            // do something nice
        }

        return $this;
    }
}