Patch isn't working

Question

i'm using magento 2 path system but it's not working, when i do a setup upgrade it doesn't reach my die, could you explain me why ?

<?php

namespace MyVendor\Company\Setup\Patch\Data;

use Magento\Customer\Model\Customer;
use Magento\Customer\Setup\CustomerSetupFactory;
use Magento\Framework\Setup\ModuleDataSetupInterface;
use Magento\Framework\Setup\Patch\DataPatchInterface;

class AddCustomerCompanyAttribute implements DataPatchInterface
{
    /**
     * @var ModuleDataSetupInterface
     */
    private $moduleDataSetup;

    /**
     * @var CustomerSetupFactory
     */
    private $customerSetupFactory;

    /**
     * Constructor.
     *
     * @param ModuleDataSetupInterface $moduleDataSetup 
     * @param CustomerSetupFactory     $customerSetupFactory 
     */
    public function __construct(
        ModuleDataSetupInterface $moduleDataSetup,
        CustomerSetupFactory $customerSetupFactory
    ) {
        $this->moduleDataSetup = $moduleDataSetup;
        $this->customerSetupFactory = $customerSetupFactory;
    }

    /**
     * {@inheritdoc}
     */
    public function apply()
    {
        die('potato');
        $this->moduleDataSetup->getConnection()->startSetup();

        $customerSetup = $this->customerSetupFactory->create(['setup' => $this->moduleDataSetup]);
        $customerSetup->addAttribute(
            Customer::ENTITY,
            'company',
            [
                'type' => 'int',
                'label' => 'Company',
                'input' => 'select',
                'required' => true,
                'position' => 30,
                'system' => false,
                'source_model' => \MyVendor\Company\Model\Customer\Attribute\Source\Company::class
            ]
        );

        $attribute = $customerSetup->getEavConfig()->getAttribute(Customer::ENTITY, 'company')
            ->addData(
                [
                    'used_in_forms' => [
                        'adminhtml_customer'
                    ]
                ]
            );
        $attribute->save();

        $this->moduleDataSetup->getConnection()->endSetup();
    }

    /**
     * {@inheritdoc}
     */
    public static function getDependencies()
    {
        return [];
    }

    /**
     * {@inheritdoc}
     */
    public function getAliases()
    {
        return [];
    }
}

Answer 1

I found out why. For peoples who has the same issue, check first you don't have created an installData like the old way to intall/upgrade your data.

If you want to migrate without duplicate your data, you should create a patch file for each install / upgrade data file you have and you could use the \Magento\Framework\Setup\Patch\PatchVersionInterface to define a specific version.

See https://devdocs.magento.com/guides/v2.3/extension-dev-guide/declarative-schema/data-patches.html