Doctrine 2.x "Unknown database type enum, MySQL57Platform may not support it" fix

Version20200508000000.php

<?php
/**
 * Symfony 4.4 migration file.
 * add this file to src/migrations/ directory.
 * github issue: https://github.com/doctrine/dbal/issues/3161
 */

declare(strict_types=1);

namespace DoctrineMigrations;

use Doctrine\DBAL\Schema\Schema;
use Doctrine\Migrations\AbstractMigration;
use Doctrine\Migrations\Version\Version;


final class Version20200508000000 extends AbstractMigration
{
    public function __construct(Version $version)
    {
        parent::__construct($version);
        /**
        * this lines solves error, solution provided by @sgilberg .
        * You don't have to add this line to every migration file.
        * Single migration file containing this line solves the error.
        */
        $this->connection->getSchemaManager()->getDatabasePlatform()->registerDoctrineTypeMapping('enum', 'string');
    }

    public function getDescription() : string
    {
        return '';
    }

    public function up(Schema $schema) : void
    {
        // this up() migration is auto-generated, please modify it to your needs
    }

    public function down(Schema $schema) : void
    {
        // this down() migration is auto-generated, please modify it to your needs
    }
}