本食谱条目介绍如何将广泛使用的 Doctrine ORM 从头开始集成到 Slim 4 应用程序中。
第一步是使用 composer 将 Doctrine ORM 导入项目中。
composer require doctrine/orm:^3.0 doctrine/dbal:^4.0 symfony/cache
请注意，Doctrine 于 2021 年 4 月 30 日官方弃用了 doctrine/cache，并在发布 v2.0.0 版本时删除了该库中的所有缓存实现。自此以后，他们建议改用 symfony/cache，它是一个符合 PSR-6 的实现。只有在需要在生产中缓存 Doctrine 元数据时才需要使用它，但这样做没有任何缺点，所以我们将在本文中展示如何进行设置。
如果你尚未迁移到 PHP8，或者只是希望继续使用传统的 PHPDoc 注释来注释实体，则还需要导入 doctrine/annotations 软件包，它曾经是 doctrine/orm 的一个依赖项，但从 2.10.0 开始它是可选的
composer require doctrine/annotations
你可以跳过此步骤，直接使用实际的 Doctrine 实体。以下仅为示例。
请注意，它使用 PHP8 属性，如果需要，请将它们转换为 PHPDoc 注释。
<?php
// src/Domain/User.php
use DateTimeImmutable;
use Doctrine\ORM\Mapping\Column;
use Doctrine\ORM\Mapping\Entity;
use Doctrine\ORM\Mapping\GeneratedValue;
use Doctrine\ORM\Mapping\Id;
use Doctrine\ORM\Mapping\Table;
#[Entity, Table(name: 'users')]
final class User
{
#[Id, Column(type: 'integer'), GeneratedValue(strategy: 'AUTO')]
private int $id;
#[Column(type: 'string', unique: true, nullable: false, options: ['collation' => 'NOCASE'])]
private string $email;
#[Column(name: 'registered_at', type: 'datetimetz_immutable', nullable: false)]
private DateTimeImmutable $registeredAt;
public function __construct(string $email)
{
$this->email = $email;
$this->registeredAt = new DateTimeImmutable('now');
}
public function getId(): int
{
return $this->id;
}
public function getEmail(): string
{
return $this->email;
}
public function getRegisteredAt(): DateTimeImmutable
{
return $this->registeredAt;
}
}
接下来，在 Slim 配置旁边添加 Doctrine 设置。
<?php
// settings.php
define('APP_ROOT', __DIR__);
return [
'settings' => [
'slim' => [
// Returns a detailed HTML page with error details and
// a stack trace. Should be disabled in production.
'displayErrorDetails' => true,
// Whether to display errors on the internal PHP log or not.
'logErrors' => true,
// If true, display full errors with message and stack trace on the PHP log.
// If false, display only "Slim Application Error" on the PHP log.
// Doesn't do anything when 'logErrors' is false.
'logErrorDetails' => true,
],
'doctrine' => [
// Enables or disables Doctrine metadata caching
// for either performance or convenience during development.
'dev_mode' => true,
// Path where Doctrine will cache the processed metadata
// when 'dev_mode' is false.
'cache_dir' => APP_ROOT . '/var/doctrine',
// List of paths where Doctrine will search for metadata.
// Metadata can be either YML/XML files or PHP classes annotated
// with comments or PHP8 attributes.
'metadata_dirs' => [APP_ROOT . '/src/Domain'],
// The parameters Doctrine needs to connect to your database.
// These parameters depend on the driver (for instance the 'pdo_sqlite' driver
// needs a 'path' parameter and doesn't use most of the ones shown in this example).
// Refer to the Doctrine documentation to see the full list
// of valid parameters: https://www.doctrine-project.org/projects/doctrine-dbal/en/current/reference/configuration.html
'connection' => [
'driver' => 'pdo_mysql',
'host' => 'localhost',
'port' => 3306,
'dbname' => 'mydb',
'user' => 'user',
'password' => 'secret',
'charset' => 'utf-8'
]
]
]
];
现在我们定义了 EntityManager 服务，这是代码中与 ORM 交互的主要点。
Slim 4 要求您提供自己的 PSR-11 容器实现。本示例使用 uma/dic，这是一个简单、简洁的 PSR-11 容器。根据您自己的选择调整容器。
传统上，注释元数据读取器是最流行的，但从 doctrine/orm 2.10.0 开始，它们使对 doctrine/annotations 的依赖变为可选，暗示该项目希望用户迁移到现代 PHP8 属性符号。
这里我们展示了如何使用 PHP8 属性配置元数据读取器。如果您尚未迁移到 PHP8 或想使用传统的 PHPDoc 注释，则需要使用 Composer 明确要求 doctrine/annotations，并且调用 Setup::createAnnotationMetadataConfiguration(...) 而不是 Setup::createAttributeMetadataConfiguration(...)，如下例所示。
<?php
// bootstrap.php
use Doctrine\DBAL\DriverManager;
use Doctrine\ORM\EntityManager;
use Doctrine\ORM\ORMSetup;
use Psr\Container\ContainerInterface;
use Symfony\Component\Cache\Adapter\ArrayAdapter;
use Symfony\Component\Cache\Adapter\FilesystemAdapter;
use UMA\DIC\Container;
require_once __DIR__ . '/vendor/autoload.php';
$container = new Container(require __DIR__ . '/settings.php');
$container->set(EntityManager::class, static function (Container $c): EntityManager {
/** @var array $settings */
$settings = $c->get('settings');
// Use the ArrayAdapter or the FilesystemAdapter depending on the value of the 'dev_mode' setting
// You can substitute the FilesystemAdapter for any other cache you prefer from the symfony/cache library
$cache = $settings['doctrine']['dev_mode'] ?
new ArrayAdapter() :
new FilesystemAdapter(directory: $settings['doctrine']['cache_dir']);
$config = ORMSetup::createAttributeMetadataConfiguration(
$settings['doctrine']['metadata_dirs'],
$settings['doctrine']['dev_mode'],
null,
$cache
);
$connection = DriverManager::getConnection($settings['doctrine']['connection']);
return new EntityManager($connection, $config);
});
return $container;
要运行数据库迁移，验证类注释等，您将创建 doctrine CLI 应用程序。此文件只需检索我们刚刚在容器中定义的 EntityManager 服务，并将其传递给 ConsoleRunner::run(new SingleManagerProvider($em))。
通常创建此文件而无需 .php 扩展名，并使其可执行。它可以放置在项目的根目录或 bin/ 子目录中。该文件以 #!/usr/bin/env php 开头，可以使用 chmod +x doctrine 命令在 Linux 上使其可执行。
#!/usr/bin/env php
<?php
use Doctrine\ORM\EntityManager;
use Doctrine\ORM\Tools\Console\ConsoleRunner;
use Doctrine\ORM\Tools\Console\EntityManagerProvider\SingleManagerProvider;
use Slim\Container;
/** @var Container $container */
$container = require_once __DIR__ . '/bootstrap.php';
ConsoleRunner::run(new SingleManagerProvider($container->get(EntityManager::class)));
花点时间验证控制台应用程序是否正常工作。配置正确后，其输出将或多或少如下所示
$ ./doctrine
Doctrine Command Line Interface 3.1.1.0
Usage:
command [options] [arguments]
Options:
-h, --help Display help for the given command. When no command is given display help for the list command
-q, --quiet Do not output any message
-V, --version Display this application version
--ansi|--no-ansi Force (or disable --no-ansi) ANSI output
-n, --no-interaction Do not ask any interactive question
-v|vv|vvv, --verbose Increase the verbosity of messages: 1 for normal output, 2 for more verbose output and 3 for debug
Available commands:
completion Dump the shell completion script
help Display help for a command
list List commands
dbal
dbal:run-sql Executes arbitrary SQL directly from the command line.
orm
orm:clear-cache:metadata Clear all metadata cache of the various cache drivers
orm:clear-cache:query Clear all query cache of the various cache drivers
orm:clear-cache:region:collection Clear a second-level cache collection region
orm:clear-cache:region:entity Clear a second-level cache entity region
orm:clear-cache:region:query Clear a second-level cache query region
orm:clear-cache:result Clear all result cache of the various cache drivers
orm:generate-proxies [orm:generate:proxies] Generates proxy classes for entity classes
orm:info Show basic information about all mapped entities
orm:mapping:describe Display information about mapped objects
orm:run-dql Executes arbitrary DQL directly from the command line
orm:schema-tool:create Processes the schema and either create it directly on EntityManager Storage Connection or generate the SQL output
orm:schema-tool:drop Drop the complete database schema of EntityManager Storage Connection or generate the corresponding SQL output
orm:schema-tool:update Executes (or dumps) the SQL needed to update the database schema to match the current mapping metadata
orm:validate-schema Validate the mapping files
此时，您可以通过运行 php vendor/bin/doctrine orm:schema-tool:create 来初始化数据库并加载架构。
恭喜！您现在可以从命令行管理数据库，并在需要在代码中使用 EntityManager。
// bootstrap.php
$container->set(UserService::class, static function (Container $c) {
return new UserService($c->get(EntityManager::class));
});
// src/UserService.php
final class UserService
{
private EntityManager $em;
public function __construct(EntityManager $em)
{
$this->em = $em;
}
public function signUp(string $email): User
{
$newUser = new User($email);
$this->em->persist($newUser);
$this->em->flush();
return $newUser;
}
}