I need to add new Const in \Magento\Catalog\Model\Category core class how can i override core class and add Const in Magento 2.4const

  • Can you describe your requirement in more details. Jul 23, 2021 at 9:34
  • I want to add Constant on \Magento\Catalog\Model\Category, with overriding class Jul 26, 2021 at 4:03

2 Answers 2


You can extend a core class and replace that in di.xml. But it's a bad practice. It's better to use a plugin to change something

Plus you can add information to the class through di.xml

Please read more here: https://devdocs.magento.com/guides/v2.4/extension-dev-guide/build/di-xml-file.html

  • Can you able to give example of how to add new Const in \Magento\Catalog\Model\Category core class by overriding in m2 Jul 24, 2021 at 10:16
  • I am able to override core class and method but not able to define Constant in on overriding class Jul 24, 2021 at 10:37
  • It's just a regular PHP class. You can do anything you want. Could you please share an error message that you get when you try to define a const?
    – Donia Mark
    Jul 24, 2021 at 15:28
  1. create di.xml in to the following location


<?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\Model\Category" type="Vendor\Extension\Model\Category" />
  1. create Category.php file on this location.


namespace Vendor\Extension\Model;

class Category extends \Magento\Catalog\Model\Category
    const STATUS_PICKING = 'picking';

  public function __construct()
        echo "Model Rewrite Working"; die();

  • Thanks For reply! I want to add Constant on Rewrited model Jul 26, 2021 at 6:48
  • where and how you wan to added that? you can added that here on the code. Jul 26, 2021 at 7:14
  • See code i have edited i want like this and i need to access this const in another class Jul 26, 2021 at 8:32
  • where is your code? nothing added to question. Jul 26, 2021 at 9:39
  • I have edited your code Jul 26, 2021 at 10:45

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