如何在Doctrine中自动选择所有关系？

<?php
use Doctrine\ORM\Tools\Setup;
use Doctrine\ORM\EntityManager;
use Doctrine\ORM\Tools\SchemaTool;

// 创建一个Doctrine的EntityManager实例
$paths = array("/path/to/entity/files");
$isDevMode = false;
$dbParams = array(
    'driver'   => 'pdo_mysql',
    'user'     => 'your_database_user',
    'password' => 'your_database_password',
    'dbname'   => 'your_database_name',
);
$config = Setup::createAnnotationMetadataConfiguration($paths, $isDevMode);
$entityManager = EntityManager::create($dbParams, $config);

// 获取实体类的元数据
$metadataFactory = $entityManager->getMetadataFactory();
$allMetadata = $metadataFactory->getAllMetadata();

// 使用SchemaTool更新数据库表结构
$schemaTool = new SchemaTool($entityManager);
$schemaTool->updateSchema($allMetadata);