Uninstalling Module Attributes through Uninstaller Script in Magento 2

During the installation of the module, it’s essential to generate certain attributes. However, upon removal of the module, the attributes and associated table remain within Magento.

In this guide, we’ll learn how to remove attributes and tables, which we created during module installation, from Magento upon module uninstallation using an Uninstaller Script.

Please note: Running this script will also remove the data in tables, so only run the Uninstaller command when you don’t need the table data anymore.

Create Uninstall.php at path vendor/module_name/Setup/Patch/Data

<?php
/**
 * Webkul Software.
 *
 * @category  Webkul
 * @package   Webkul_UninstallerTest
 * @author    Webkul
 * @copyright Copyright (c) 2010-2017 Webkul Software Private Limited (https://webkul.com)
 * @license   https://store.webkul.com/license.html
 */
namespace Webkul\UninstallerTest\Setup\Patch\Data;

use Magento\Framework\DB\Adapter\AdapterInterface;
use Magento\Framework\Db\Select;
use Magento\Framework\Setup\ModuleContextInterface;
use Magento\Framework\Setup\SchemaSetupInterface;
use Magento\Framework\Setup\UninstallInterface as UninstallInterface;
use Magento\Eav\Setup\EavSetupFactory;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Framework\Setup\Patch\DataPatchInterface;

/**
 * Class Uninstall
 */
class Uninstall implements DataPatchInterface
{
    /**
     * EAV setup factory
     *
     * @var EavSetupFactory
     */
    private $_eavSetupFactory;
    
    private $_mDSetup;
    /**
     * Init
     *
     * @param EavSetupFactory $eavSetupFactory
     */
    public function __construct(
        EavSetupFactory $eavSetupFactory,
        ModuleDataSetupInterface $mDSetup,
        SchemaSetupInterface $setup
    )
    {
        $this->_eavSetupFactory = $eavSetupFactory;
        $this->_mDSetup = $mDSetup;
        $this->setup = $setup;
    }

    public function apply()
    {
        $setup = $this->setup;
        $installer = $setup;
        $installer->startSetup();

        /** @var AdapterInterface $connection */
        $connection = $installer->getConnection();
        $connection->dropTable('wk_test'); // remove table wk_test

        $installer->endSetup();

        /** @var EavSetup $eavSetup */
        $eavSetup = $this->_eavSetupFactory->create(['setup' => $this->_mDSetup]);
        $eavSetup->removeAttribute(\Magento\Catalog\Model\Product::ENTITY, 'test_uninstall'); // removing the installed attribute
    }

    /**
    * Get Dependecies
    */
     public static function getDependencies()
     {
        return [];
     }

     /**
     * Get Aliases
     */
      public function getAliases()
      {
         return [];
      }
}

In the above script, I have removed the product attribute ‘test_uninstall’ and table ‘wk_test’.