Paypal Controller Overriding/Extending not working

Question

I have Magento 1.9 CE and I'm trying to create a new module for extend the class Mage_Paypal_Controller_Express_Abstract, but it doesn't work.
Here's the code:

Name_Module.xml in /app/etc/modules

<?xml version="1.0"?>
  <config>
    <modules>
     <Name_Module>
        <active>true</active>
        <codePool>local</codePool>
        <depends></depends>
     </Name_Module>
  </modules>
</config>

config.xml from /app/code/local/Name/Module/etc/

<?xml version="1.0"?>
 <config>
  <modules>
    <Name_Module>
        <version>1.0.0</version>
    </Name_Module>
</modules>
<frontend>  
    <routers>
          <paypal>
            <args>
                <modules>
                        <Name_Module before="Mage_Paypal">Name_Module _Paypal</Name_Module >
                </modules>
             </args>
        </paypal>
    </routers>
</frontend>

and Abstract.php app/code/local/Name//Controller/Paypal/Express/

<?php
include_once('Mage/Paypal/Controller/Express/Abstract.php');
class Name_Module_Paypal_Express_Abstract extends        Mage_Paypal_Controller_Express_Abstract{

/**
 * Submit the order
 */
 public function placeOrderAction()
 {
      //code
  }
 }

Why doesn't it work?

Answer 1

You can't overwrite an Abstract class in Magento. The class that you are trying to overwrite Mage_Paypal_Controller_Express_Abstract is an abstract class and hence can't rewrite by controller-rewrite way.

If you want to edit placeOrderAction(), the only possible way is put that core file in local codepool. For this :

1. Create a file app\code\local\Mage\Paypal\Controller\Express\Abstract.php
2. Copy paste original content of the file Abstarct.php to this file.
3. Now edit placeOrderAction() according to your need.

Answer 2

In Magenton abstract class does not override ....SO you can not rewrite class

Mage_Paypal_Controller_Express_Abstract.... 

Also there lot issue in code;

use <depends>Mage_Paypal</depends> instead of <depends></depends>

Answer 3

Mage_Paypal_Controller_Express_Abstract is a basic class which implements common methods, you dont need to rewrite it.

Instead you need to define which payment method you want to modify excalty. In your case I suppose it is a Mage_Paypal_ExpressController.

So, all you need to rewrite Mage_Paypal_ExpressController class and implement own logic for method placeOrderAction().

It will work because Mage_Paypal_ExpressController extends Mage_Paypal_Controller_Express_Abstract and all methods you define in Mage_Paypal_ExpressController will replace methods from parent class.