I want to make changes(PHP code) to the method processPaymentConfiguration, but I don't know how I can override the method so my changes have a higher priority. I can alter the LayoutProcessor file but it's never good to apply changes to a core file.

So my question; is this possible and what do I need to do to achieve this?


namespace Vendor\Module\Block\Checkout;

use Magento\Framework\App\ObjectManager;
use Magento\Checkout\Block\Checkout\LayoutProcessorInterface;
use Magento\Customer\Model\AttributeMetadataDataProvider;
use Magento\Ui\Component\Form\AttributeMapper;
use Magento\Checkout\Block\Checkout\AttributeMerger;
use Magento\Customer\Model\Options;

class LayoutProcessor implements LayoutProcessorInterface
    private $attributeMetadataDataProvider;
    protected $attributeMapper;
    protected $merger;
    private $options;

    public function __construct(
        AttributeMetadataDataProvider $attributeMetadataDataProvider,
        AttributeMapper $attributeMapper,
        AttributeMerger $merger
    ) {
        $this->attributeMetadataDataProvider = $attributeMetadataDataProvider;
        $this->attributeMapper               = $attributeMapper;
        $this->merger                        = $merger;

    private function getOptions()
        //same code as Magento/Checkout/Block/LayoutProcessor::getOptions()

    private function getAddressAttributes()
        //same code as Magento/Checkout/Block/LayoutProcessor::getAddressAttributes()

    private function convertElementsToSelect($elements, $attributesToConvert)
        //same code as Magento/Checkout/Block/LayoutProcessor::convertElementsToSelect()

    public function process($jsLayout)
        //same code as Magento/Checkout/Block/LayoutProcessor::process()

    private function processPaymentConfiguration(array &$configuration, array $elements)
        code from Magento/Checkout/Block/LayoutProcessor::processPaymentConfiguration()
        with a couple changes.
        It works when I apply the changes in code file (vendor/magento/magento-checkout/...)

When I var_dump processPaymentConfigurationfrom the core and my custom code, I get the same results. So it looks like the code executes and returns the right thing but nothing is happening.


<?xml version="1.0"?>
<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    <preference for="Magento\Checkout\Block\Checkout\LayoutProcessor" type="Vendor\Module\Block\Checkout\LayoutProcessor" />
  • 1
    Simply override the block. You can achieve this with help of plugin also. – Dinesh Yadav Jun 7 '17 at 12:19
  • processPaymentConfiguration is private method. So you don't modify even if you overwrite LayoutProcessor class. Create a plugin for LayoutProcessor::process, then you need to modify layout payment config array. – Sohel Rana Jun 7 '17 at 15:21
  • @SohelRana Why should I modify an array, this doesn't allow me to change a method. Am I missing something? – creativename Jun 8 '17 at 7:42
  • @DineshYadav I overrided the block, turns out I forgot to update my di.xml, but it still does not work. I've updated my question with my code. – creativename Jun 9 '17 at 9:26

you have to "extend" the class not "implement" interface..

class LayoutProcessor extends \Magento\Checkout\Block\Checkout\LayoutProcessor
| improve this answer | |
  1. Create your own module if you do not have created it yet.
  2. Implement \Magento\Checkout\Block\Checkout\LayoutProcessorInterface::process in your module through YourModule/etc/frontend/di.xml. Check implementation in \Magento\Checkout\Block\Checkout\LayoutProcessor::process as a reference

  3. In your new implementation of LayoutProcessorInterface::process method get all payment methods by

    $paymentList = $jsLayout['components']['checkout']['children']['steps']['children']['billing-step']['children']['payment']['children']['payments-list']['children'] ?? null;

  4. Iterate through this payment list and modify layout configuration as needed.

  5. Return modified $jsLayout from your implementation of LayoutProcessorInterface::process method.

| improve this answer | |

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