I need to override a core controller's preDispatch method. The core controller inherits from Mage_Checkout_Controller_Action, which itself has a preDispatch method that needs to be called. Since I'm extending from the core controller I want to override, I cannot just call parent::preDispatch(), since that would pull in functionality that I'm trying to avoid.

My question is - How can I call an overridden method that is 2 levels higher in the inheritance chain, or am I just going about this the wrong way?


Apparently this works:

Mage_Checkout_Controller_Action::preDispatch(); (even though that method is not static, I guess you learn something new every day..)

Now my question is: Is there a better way of doing this without having to copy in all functionality from the class I am overridding?

The reason I am attempting this is because I was going down this path, attempting to force Magento to remember address assignments when customers go through multishipping checkout and then subsequently leave. (FWIW, I found the linked to article great for getting me going in the right direction, but there seems to be a lot missing as far as steps that need to be taken to get this to work).

The controller I'm overriding is the core MultiShippingController which has a redirect back to the Multishipping IndexAction that needs to be avoided. On a somewhat side-note, I have gotten this functionality mostly complete, save for a few issues (relating to the adding of the first item to the cart and the Mage_Sales_Model_Quote_Item->getQuoteItem() returning null in the addresses.phtml template, though that is an entirely different discussion).

  • 1
    Just in case anyone else wanders onto this later and wonders how/why the (seemingly) static syntax is working. I'd refer you to this StackOverflow answer which explains it very well. In short, it's not "static" just like parent::someMethod() is not static, but rather specifies part of the inheritance tree to traverse before calling a method in the proper $this context of the present class' instance. – Brian Nov 18 '15 at 2:09

I think it'd be interesting to know exactly what you're trying to accomplish, but I can give you a few pointers without knowing details:

In most cases if the method you're trying to reference does not use $this, you can safely call it statically:


But you should probably be doing this via a controller predispatch observer. Magento affords you the ability to do this in Mage_Core_Controller_Varien_Action:

abstract class Mage_Core_Controller_Varien_Action
    // [...]
    public function preDispatch()
        // [...]
        if ($this->_rewrite()) {
            return; // [What is the purpose if this?]
        // [...]

        // [This is where my event needs to be firing, but this code never gets 
        // executed because the controller is rewritten]

    // [...]

All you have to do is add the full action name onto the end of controller_action_predispatch. An example of shoehorning functionality into Onepage Savebilling:


What's more, in your observer method, you need to accept the observer and you can get the controller itself from getEvent:


class MyCompany_MyModule_Model_Observer

    public function myPredispatchObserver($observer)
        $controller = $observer->getEvent()->getControllerAction();
  • 1
    Thanks for the insight. I updated my question as to why I'm doing this. – Jeff Lambert Jul 11 '13 at 13:54

I'm on my phone, but I'd think that you could use any one of several events to remove the redirect from the response object.

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