1

I wanted to make changes in _prepareLayout() in block. Code is as follow:

Block: Magento\Catalog\Block\Category\View

protected function _prepareLayout()
{
    parent::_prepareLayout();

    $this->getLayout()->createBlock(\Magento\Catalog\Block\Breadcrumbs::class);

    $category = $this->getCurrentCategory();
    if ($category) {
        $title = $category->getMetaTitle();
        if ($title) {
            $this->pageConfig->getTitle()->set($title);
        }
        $description = $category->getMetaDescription();
        if ($description) {
            $this->pageConfig->setDescription($description);
        }
        $keywords = $category->getMetaKeywords();
        if ($keywords) {
            $this->pageConfig->setKeywords($keywords);
        }
        if ($this->_categoryHelper->canUseCanonicalTag()) {
            $this->pageConfig->addRemotePageAsset(
                $category->getUrl(),
                'canonical',
                ['attributes' => ['rel' => 'canonical']]
            );
        }

        $pageMainTitle = $this->getLayout()->getBlock('page.main.title');
        if ($pageMainTitle) {
            $pageMainTitle->setPageTitle($this->getCurrentCategory()->getName());
        }
    }

    return $this;
}

As per above code, I want to make change in below data:

if ($this->_categoryHelper->canUseCanonicalTag()) {
      $this->pageConfig->addRemotePageAsset(
          $category->getUrl(),
          'canonical',
          ['attributes' => ['rel' => 'canonical']]
      );
}

Help me to change the parameter passed to addRemotePageAsset() by overriding block.

0

2 Answers 2

1

you can not override protected methods in Magento 2, only the public method can be overridden using plugin or preference. there is no way to override protected and private method in Magento 2.

6
  • So how can i add custom code to _prepareLayout() as i have mentioned in my code?
    – Unknown
    Mar 14, 2019 at 5:17
  • using preference we can rewrite the whole class, I don't know about what you've mentioned. Give me any document where it shows it cannot possible to override a protected function Mar 14, 2019 at 5:18
  • @Parthavi have a look at it magento.stackexchange.com/questions/126260/… Mar 14, 2019 at 5:20
  • 1
    @PrathapGunasekaran u mean that we can use preference for overwriting protected method
    – Unknown
    Mar 14, 2019 at 5:24
  • Yes we can use it. Mar 14, 2019 at 5:24
1

In your custom module (lets assume the module is in app/code/Extend/Simple)

etc/di.xml

<?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\Catalog\Block\Category\View" type="Extend\Simple\Block\CategoryView" />
</config>

create class "CategoryView" under Extend\Simple\Block

<?php declare(strict_types=1);

namespace Extend\Simple\Block;

class CategoryView extends \Magento\Catalog\Block\Category\View
{
    protected function _prepareLayout()
    {
       //Your function goes here
    }
}

run setup upgrade

or

cache flush & setup di compile

2
  • It's very important to remove parent::_prepareLayout(); from your _prepareLayout() method.
    – WaPoNe
    May 27, 2021 at 14:53
  • @WaPoNe removing means you are throwing off the old functionality, it's not always a good idea to discard if fully, it depends on the business needs. Jun 1, 2021 at 10:38

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