How to rewrite customer controller in Magento 2?

We can do it by using preference if we need to add or edit some information in createPost controller.

To do that we will need a module : Magemonkeys_General

We have need two files.

Create di.xml file in this folder app/code/Magemonkeys/General/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\Customer\Controller\Account\CreatePost" type="Magemonkeys\General\Controller\Magento\Customer\Account\CreatePost" />
</config>

<?xml version="1.0"?>

</config>

Create CreatePost.php in this folder app/code/Magemonkeys/General/Controller/Magento/Customer/Account/

<?php

namespace Magemonkeys\General\Controller\Magento\Customer\Account;
use Magento\Customer\Api\CustomerRepositoryInterface as CustomerRepository;
use Magento\Framework\App\Action\HttpPostActionInterface as HttpPostActionInterface;
use Magento\Customer\Model\Account\Redirect as AccountRedirect;
use Magento\Customer\Api\Data\AddressInterface;
use Magento\Framework\Api\DataObjectHelper;
use Magento\Framework\App\Action\Context;
use Magento\Customer\Model\Session;
use Magento\Framework\App\Config\ScopeConfigInterface;
use Magento\Framework\App\CsrfAwareActionInterface;
use Magento\Framework\App\ObjectManager;
use Magento\Framework\App\Request\InvalidRequestException;
use Magento\Framework\App\RequestInterface;
use Magento\Framework\Controller\Result\Redirect;
use Magento\Framework\Exception\LocalizedException;
use Magento\Framework\Phrase;
use Magento\Store\Model\StoreManagerInterface;
use Magento\Customer\Api\AccountManagementInterface;
use Magento\Customer\Helper\Address;
use Magento\Framework\UrlFactory;
use Magento\Customer\Model\Metadata\FormFactory;
use Magento\Newsletter\Model\SubscriberFactory;
use Magento\Customer\Api\Data\RegionInterfaceFactory;
use Magento\Customer\Api\Data\AddressInterfaceFactory;
use Magento\Customer\Api\Data\CustomerInterfaceFactory;
use Magento\Customer\Model\Url as CustomerUrl;
use Magento\Customer\Model\Registration;
use Magento\Framework\Escaper;
use Magento\Customer\Model\CustomerExtractor;
use Magento\Framework\Exception\StateException;
use Magento\Framework\Exception\InputException;
use Magento\Framework\Data\Form\FormKey\Validator;
use Magento\Customer\Controller\AbstractAccount;

class CreatePost extends \Magento\Customer\Controller\Account\CreatePost
{
	/**
     * @var Validator
     */
    private $formKeyValidator;
    protected $inlineTranslation;

    /**
     * @var \Magento\Framework\Stdlib\Cookie\PhpCookieManager
     */
    private $cookieMetadataManager;

    /**
     * @var \Magento\Framework\Stdlib\Cookie\CookieMetadataFactory
     */
    private $cookieMetadataFactory;

    public function __construct(
    	Context $context,
        Session $customerSession,
        ScopeConfigInterface $scopeConfig,
        StoreManagerInterface $storeManager,
        AccountManagementInterface $accountManagement,
        Address $addressHelper,
        UrlFactory $urlFactory,
        FormFactory $formFactory,
        SubscriberFactory $subscriberFactory,
        RegionInterfaceFactory $regionDataFactory,
        AddressInterfaceFactory $addressDataFactory,
        CustomerInterfaceFactory $customerDataFactory,
        CustomerUrl $customerUrl,
        Registration $registration,
        Escaper $escaper,
        CustomerExtractor $customerExtractor,
        DataObjectHelper $dataObjectHelper,
        AccountRedirect $accountRedirect,
        CustomerRepository $customerRepository,
        Validator $formKeyValidator = null
    ) {
    	$this->formKeyValidator = $formKeyValidator ?: ObjectManager::getInstance()->get(Validator::class);
        $this->accountRedirect = $accountRedirect;
    	return parent::__construct($context,$customerSession,$scopeConfig,$storeManager,$accountManagement,$addressHelper,$urlFactory,$formFactory,$subscriberFactory,$regionDataFactory,$addressDataFactory,$customerDataFactory,$customerUrl,$registration,$escaper,$customerExtractor,$dataObjectHelper,$accountRedirect,$customerRepository,$formKeyValidator);
    }

	public function execute()
    {          
        /** @var Redirect $resultRedirect */
        $resultRedirect = $this->resultRedirectFactory->create();
        if ($this->session->isLoggedIn() || !$this->registration->isAllowed()) {
            $resultRedirect->setPath('*/*/');
            return $resultRedirect;
        }

        // We can write our login here
    }
}

<?php

namespace Magemonkeys\General\Controller\Magento\Customer\Account;

use Magento\Customer\Api\CustomerRepositoryInterface as CustomerRepository;

use Magento\Framework\App\Action\HttpPostActionInterface as HttpPostActionInterface;

use Magento\Customer\Model\Account\Redirect as AccountRedirect;

use Magento\Customer\Api\Data\AddressInterface;

use Magento\Framework\Api\DataObjectHelper;

use Magento\Framework\App\Action\Context;

use Magento\Customer\Model\Session;

use Magento\Framework\App\Config\ScopeConfigInterface;

use Magento\Framework\App\CsrfAwareActionInterface;

use Magento\Framework\App\ObjectManager;

use Magento\Framework\App\Request\InvalidRequestException;

use Magento\Framework\App\RequestInterface;

use Magento\Framework\Controller\Result\Redirect;

use Magento\Framework\Exception\LocalizedException;

use Magento\Framework\Phrase;

use Magento\Store\Model\StoreManagerInterface;

use Magento\Customer\Api\AccountManagementInterface;

use Magento\Customer\Helper\Address;

use Magento\Framework\UrlFactory;

use Magento\Customer\Model\Metadata\FormFactory;

use Magento\Newsletter\Model\SubscriberFactory;

use Magento\Customer\Api\Data\RegionInterfaceFactory;

use Magento\Customer\Api\Data\AddressInterfaceFactory;

use Magento\Customer\Api\Data\CustomerInterfaceFactory;

use Magento\Customer\Model\Url as CustomerUrl;

use Magento\Customer\Model\Registration;

use Magento\Framework\Escaper;

use Magento\Customer\Model\CustomerExtractor;

use Magento\Framework\Exception\StateException;

use Magento\Framework\Exception\InputException;

use Magento\Framework\Data\Form\FormKey\Validator;

use Magento\Customer\Controller\AbstractAccount;

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

{

/**

* @var Validator

private $formKeyValidator;

protected $inlineTranslation;

/**

* @var \Magento\Framework\Stdlib\Cookie\PhpCookieManager

private $cookieMetadataManager;

/**

* @var \Magento\Framework\Stdlib\Cookie\CookieMetadataFactory

private $cookieMetadataFactory;

public function __construct(

Context $context,

Session $customerSession,

ScopeConfigInterface $scopeConfig,

StoreManagerInterface $storeManager,

AccountManagementInterface $accountManagement,

Address $addressHelper,

UrlFactory $urlFactory,

FormFactory $formFactory,

SubscriberFactory $subscriberFactory,

RegionInterfaceFactory $regionDataFactory,

AddressInterfaceFactory $addressDataFactory,

CustomerInterfaceFactory $customerDataFactory,

CustomerUrl $customerUrl,

Registration $registration,

Escaper $escaper,

CustomerExtractor $customerExtractor,

DataObjectHelper $dataObjectHelper,

AccountRedirect $accountRedirect,

CustomerRepository $customerRepository,

Validator $formKeyValidator = null

) {

$this->formKeyValidator = $formKeyValidator ?: ObjectManager::getInstance()->get(Validator::class);

$this->accountRedirect = $accountRedirect;

return parent::__construct($context,$customerSession,$scopeConfig,$storeManager,$accountManagement,$addressHelper,$urlFactory,$formFactory,$subscriberFactory,$regionDataFactory,$addressDataFactory,$customerDataFactory,$customerUrl,$registration,$escaper,$customerExtractor,$dataObjectHelper,$accountRedirect,$customerRepository,$formKeyValidator);

}

public function execute()

{

/** @var Redirect $resultRedirect */

$resultRedirect = $this->resultRedirectFactory->create();

if ($this->session->isLoggedIn() || !$this->registration->isAllowed()) {

$resultRedirect->setPath('*/*/');

return $resultRedirect;

}

// We can write our login here

}

we will also need to add private function in this file as we used execute method.

/**
     * Retrieve cookie manager
     *
     * @deprecated 100.1.0
     * @return \Magento\Framework\Stdlib\Cookie\PhpCookieManager
     */
    private function getCookieManager()
    {
        if (!$this->cookieMetadataManager) {
            $this->cookieMetadataManager = ObjectManager::getInstance()->get(
                \Magento\Framework\Stdlib\Cookie\PhpCookieManager::class
            );
        }
        return $this->cookieMetadataManager;
    }

/**

* Retrieve cookie manager

* @deprecated 100.1.0

* @return \Magento\Framework\Stdlib\Cookie\PhpCookieManager

private function getCookieManager()

{

if (!$this->cookieMetadataManager) {

$this->cookieMetadataManager = ObjectManager::getInstance()->get(

\Magento\Framework\Stdlib\Cookie\PhpCookieManager::class

);

}

return $this->cookieMetadataManager;

}

That’s it.

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