Destroy specific session data on complete order

Question

I am using Magento 1.9.

When I want to destroy a specific session in Magento I run this code:

Mage::getSingleton('core/session')->unsPcPayment();

But I want to execute this code when an order is completed.

How can I do this? Where should I put this code?

NOTE: I do not want to destroy this session when the order is paid, I just want to destroy the session when the order is simply received.

Answer 1

You can try to create an observer in a module, preferrable your own module in the local code pool:

<!-- app/code/local/Mymodule/etc/config.xml -->
...
<global>
    <events>
        ...
        <sales_order_place_after>
            <observers>
                <clear_session>
                    <class>Mymodule_Model_Observer</class>
                    <method>clearCheckoutSession</method>
                </clear_session>
            </observers>
        </sales_order_place_after>
    </events>
</global>
...

Don't know how this works? See here:

http://www.magentocommerce.com/wiki/5_-_modules_and_development/0_-_module_development_in_magento/customizing_magento_using_event-observer_method

Once you declare the observer, build it out:

<?php

// app/code/local/Mymodule/Model/Observer.php

class Mymodule_Model_Observer 
    extends Varien_Event_Observer
{

    public function clearCheckoutSession()
    {
        Mage::getSingleton('core/session')->clear(); // Or whatever you want to clear
    }

}

You'll want to customize this to your needs, obviously. And put some verification checks in there as well.

EDIT: As per laketuna's suggestion, I changed the target event to sales_order_place_after, as it seems to be the most reliable one to observe.

Answer 2

you can try to put an observer in checkout_onepage_controller_success_action (or some event after the order is placed).

<?xml version="1.0"?>
<config>
    <modules>
        <GP_Savesku>
            <version>0.0.1</version>
        </GP_Savesku>
    </modules>
    <global>
        <models>
            <gp_savesku>
                <class>GP_Savesku_Model</class>
            </gp_savesku>
        </models>
        <events>
            <checkout_onepage_controller_success_action>
                <observers>
                    <gp_savesku>
                        <type>singleton</type>
                        <class>gp_savesku/observer</class>
                        <method>saveSku</method>
                    </gp_savesku>
                </observers>
            </checkout_onepage_controller_success_action>
        </events>
    </global>
</config>

Observer.php

class GP_Savesku_Model_Observer {
 public function saveSku($observer){
    if(Mage::getSingleton('customer/session')->getDummy()){
      Mage::getSingleton('customer/session')->unsDummy();
    }
 }
}

Is working on a production enviroment right now :)