Override module-contact view and controller

Question

I created a new page with the CMS. I paste this in editor:

{{block class="Magento\Contact\Block\ContactForm" name="contactForm" template="Magento_Theme::html/contact_form.phtml"}}

Then I overrided the contact_form.phtml successfully for my theme under

app/design/fontend/MyThemes/2016/Magento_Theme/templates/html/

Submitting the form send to this controller vendor/module-contact/Controller/Index/Post.php

Route used in this controller is $this->_redirect('contact/index'); which is not the page I created with the cms.

My Question now is, how to override the controller?

I tried by creating the file under app/code/module-contact/Controller/Index/Post.php, but no success.

<?php    
namespace Magento\Contact\Controller\Index;

class Post extends \Magento\Contact\Controller\Index
{
    public function execute()
    {
        die('pass here?');
    }
}

Answer 1

You need to create small module for this.

Using di.xml can rewrite the controller Post.php

First ,Create module registration file registration.php at app\code\VendorName\ModuleName. Code is below:

<?php
\Magento\Framework\Component\ComponentRegistrar::register(
    \Magento\Framework\Component\ComponentRegistrar::MODULE,
    'VendorName_ModuleName',
    __DIR__
);

Then create module main config module.xml file at app\code\VendorName\ModuleName\etc. Code is below:

<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Module/etc/module.xsd">
    <module name="VendorName_ModuleName" setup_version="2.0.0">
        <sequence>
            <module name="Magento_Contact"/>
        </sequence>
    </module>
</config>

3rd, create di.xml where you define configuration that which class will rewrite and which class rewriting and di.xml located at app\code\VendorName\ModuleName\etc and code is below:

<?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\Contact\Controller\Index\Post" type="VendorName\ModuleName\Controller\Index\Post" />
</config>

4th, write the rewrite class which located at Post.php app\code\VendorName\ModuleName\Controller\Index.

<?php
namespace VendorName\ModuleName\Controller\Index;

class Post extends \Magento\Contact\Controller\Index\Post
{
    /**
     * Post user question
     *
     * @return void
     * @throws \Exception
     */
    public function execute()
    {
        $post = $this->getRequest()->getPostValue();
        if (!$post) {
            $this->_redirect('*/*/');
            return;
        }

        $this->inlineTranslation->suspend();
        try {
            $postObject = new \Magento\Framework\DataObject();
            $postObject->setData($post);

            $error = false;

            if (!\Zend_Validate::is(trim($post['name']), 'NotEmpty')) {
                $error = true;
            }
            if (!\Zend_Validate::is(trim($post['comment']), 'NotEmpty')) {
                $error = true;
            }
            if (!\Zend_Validate::is(trim($post['email']), 'EmailAddress')) {
                $error = true;
            }
            if (\Zend_Validate::is(trim($post['hideit']), 'NotEmpty')) {
                $error = true;
            }
            if ($error) {
                throw new \Exception();
            }

            $storeScope = \Magento\Store\Model\ScopeInterface::SCOPE_STORE;
            $transport = $this->_transportBuilder
                ->setTemplateIdentifier($this->scopeConfig->getValue(self::XML_PATH_EMAIL_TEMPLATE, $storeScope))
                ->setTemplateOptions(
                    [
                        'area' => \Magento\Backend\App\Area\FrontNameResolver::AREA_CODE,
                        'store' => \Magento\Store\Model\Store::DEFAULT_STORE_ID,
                    ]
                )
                ->setTemplateVars(['data' => $postObject])
                ->setFrom($this->scopeConfig->getValue(self::XML_PATH_EMAIL_SENDER, $storeScope))
                ->addTo($this->scopeConfig->getValue(self::XML_PATH_EMAIL_RECIPIENT, $storeScope))
                ->setReplyTo($post['email'])
                ->getTransport();

            $transport->sendMessage();
            $this->inlineTranslation->resume();
            $this->messageManager->addSuccess(
                __('Thanks for contacting us with your comments and questions. We\'ll respond to you very soon.')
            );
            $this->_redirect('YOUR_CMS_PAGE_Identifier'); // change here 
            return;
        } catch (\Exception $e) {
            $this->inlineTranslation->resume();
            $this->messageManager->addError(
                __('We can\'t process your request right now. Sorry, that\'s all we know.')
            );
            $this->_redirect('YOUR_CMS_PAGE_Identifier');  // change here 
            return;
        }
    }
}

• Now you need to enable php bin/magento module:status

  php bin/magento module:enable VendorName_ModuleName for enable the module.

• and run php bin/magento setup:upgrade for enabled modules are properly registered.

Then clear cache.

NOte:This module is tested