Magento 2: Overriding Block, Model, Controller, Helper using Preference

Overriding Block, Model, Controller, Helper in Magento 2

Magento 2: Overriding Block, Model, Controller, Helper using Preference

May 13th, 2017 sagar Magento 2

You can create a skeleton of module from Module Generator.
After creating a module structure update your module to database using command line code :

php bin/magento setup:upgrade

1	php bin/magento setup:upgrade

To every magento project there needs certain level of customization on overriding magento core classes. Editing and adding our custom code on magento core classes is a bad practice since they all will be overwritten during magento upgrade. So, there comes a concept of magento classes override. For this magento 2 has two approaches, they are :

1. Using preference
2. Using plugins

Today I will be discussing on using preference for overriding core customer module.

OVERRIDING CUSTOMER BLOCK

Step #1 – Create a di.xml file in a folder Sagar/ClassOverride/etc

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
        <preference for="Magento\Customer\Block\Form\Register" type="Sagar\ClassOverride\Block\Form\Register" />
 </config>

</config>

Step #2 – The next step to override Magento2 Block is to create a Register.php Block file in the folder Sagar/ClassOverride/Block/Form

<?php 
namespace Sagar\ClassOverride\Block\Form;

class Register extends \Magento\Customer\Block\Form\Register {
	
	public function __construct(){
	 	die('block overriden');
	 }
}

?>

<?php

namespace Sagar\ClassOverride\Block\Form;

class Register extends \Magento\Customer\Block\Form\Register {

public function __construct(){

die('block overriden');

}

OVERRIDING CUSTOMER MODEL

Step #1 – Create a di.xml file in a folder Sagar/ClassOverride/etc

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
       <preference for="Magento\Customer\Model\Customer" type="Sagar\ClassOverride\Model\Customer" />
 </config>

</config>

Step #2 – The next step to override Magento2 Model is to create a Customer.php Model file in the folder Sagar/ClassOverride/Model

<?php 
namespace Sagar\ClassOverride\Model;

class Customer extends \Magento\Customer\Model\Customer {
	public function __construct(){
		die('model override');
	}
}
?>

<?php

namespace Sagar\ClassOverride\Model;

class Customer extends \Magento\Customer\Model\Customer {

public function __construct(){

die('model override');

}

OVERRIDING CUSTOMER CONTROLLER

Step #1 – Create a di.xml file in a folder Sagar/ClassOverride/etc

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Customer\Controller\Account\CreatePost" type="Sagar\ClassOverride\Controller\Account\CreatePost" />
 </config>

</config>

Step #2 – The next step to override Magento2 Controller is to create a CreatePost.php Controller file in the folder Sagar/ClassOverride/Controller/Account

<?php 
namespace Sagar\ClassOverride\Controller\Account;

class CreatePost extends \Magento\Customer\Controller\Account\CreatePost {
	
	public function __construct(){
		die('controller');
	}
	     
} 
?>

<?php

namespace Sagar\ClassOverride\Controller\Account;

class CreatePost extends \Magento\Customer\Controller\Account\CreatePost {

public function __construct(){

die('controller');

}

OVERRIDING CUSTOMER HELPER

Step #1 – Create a di.xml file in a folder Sagar/ClassOverride/etc

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:ObjectManager/etc/config.xsd">
    <preference for="Magento\Customer\Controller\Account\CreatePost" type="Sagar\ClassOverride\Controller\Account\CreatePost" />
 </config>

</config>

Step #2 – The next step to override Magento2 Helper is to create a Address.php Helper file in the folder Sagar/ClassOverride/Helper

<?php 
namespace Sagar\ClassOverride\Helper;

class Address extends \Magento\Customer\Helper\Address
{
	function __construct()
	{
		die('helper overridden');
		
	}
}
?>