Controller Override in Magento 2

Today, we’re going to explain how to override controller in Magento 2 and hope you are already familiar with controller & its functionality. Controller basically stands behind the process of handling incoming requests and it plays a significant role in Magento 2 routing implementation. Controller overriding is mainly required while working on custom modules in Magento 2 and you need to work on overriding core module files.

By following the simple steps as mentioned below, you can easily override the controller in Magento 2 and we hope that you can grab that “Ah-ha!” moment. Or at the very least you’ll say, “That’s very easy.”

Step1)

Create di.xml file in app/code/<VendorName>/<ModuleName>/etc

<?xml version="1.0"?>

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">

 

<preference for="Magento\Checkout\Controller\Cart\Add" type="<VendorName>\<ModuleName>\Controller\Rewrite\Cart\Add" />

 

</config>

 

Code Explanation

<VendorName>\<ModuleName>\Controller\Rewrite\Cart\Add is used to override Magento\Checkout\Controller\Cart\Add

Step2)

Define an overriding controller class

Create Add.php in app/code/<VendorName>/<ModuleName>/Controller/Rewrite/Cart/


<?php


namespace <VendorName>\<ModuleName>\Controller\Rewrite\Cart;


class Add extends \Magento\Checkout\Controller\Cart\Add

{

public function execute()

{

// perform action

}

}