如何安装Doctrine 2.2 ORM

Question

我已经下载了Doctrine 2.2 ORM。我已经查阅了它的安装指南，但是我无法正确理解它的文档。有人能够指导我如何设置Doctrine吗？我之前在Java中使用过Hibernate ORM框架。他们有非常易于初学者理解的优秀文档。我认为Doctrine的文档不到那个水平。有人可以提供一些关于Doctrine的样例项目来入门吗？

- rockstar

Answer 1

有几种方法可以将Doctrine安装到您的网站项目中。我将向您展示一种简单的替代方法：

• 下载Doctrine包并在服务器上解压缩。现在您的目录看起来像这样：

  localhost/Doctrine
  localhost/Doctrine/Common
  localhost/Doctrine/ORM
  localhost/Doctrine/DBAL

• 您需要创建两个额外的文件夹，以存储您的模型（持久性实体）和代理：

  localhost/models
  localhost/proxies

• 创建一个类，负责创建EntityManager对象和与数据库的连接。让我们创建名为Doctrine的神奇类：

  localhost/doctrine.php

设置属性：

<?php
use Doctrine\Common\ClassLoader,
    Doctrine\ORM\Configuration,
    Doctrine\ORM\EntityManager,
    Doctrine\Common\Cache\ArrayCache,
    Doctrine\DBAL\Logging\EchoSQLLogger;

class Doctrine{

  public $em = null;

  public function __construct()
  {

    require_once 'Doctrine/Common/ClassLoader.php';

    $doctrineClassLoader = new ClassLoader('Doctrine',  '/');
    $doctrineClassLoader->register();
    $entitiesClassLoader = new ClassLoader('models', '/models/');
    $entitiesClassLoader->register();
    $proxiesClassLoader = new ClassLoader('Proxies', '/proxies/');
    $proxiesClassLoader->register();

    // Set up caches
    $config = new Configuration;
    $cache = new ArrayCache;
    $config->setMetadataCacheImpl($cache);
    $driverImpl = $config->newDefaultAnnotationDriver(array('/models/Entities'));
    $config->setMetadataDriverImpl($driverImpl);
    $config->setQueryCacheImpl($cache);

    $config->setQueryCacheImpl($cache);

    // Proxy configuration
    $config->setProxyDir('/proxies');
    $config->setProxyNamespace('Proxies');

    // Set up logger
    $logger = new EchoSQLLogger;
    //$config->setSQLLogger($logger);

    $config->setAutoGenerateProxyClasses( TRUE );

    // Database connection information
    $connectionOptions = array(
        'driver' => 'pdo_mysql',
        'user' =>     'USER',
        'password' => 'PASS',
        'host' =>     'HOST',
        'dbname' =>   'DB_NAME'
    );

    // Create EntityManager
    $this->em = EntityManager::create($connectionOptions, $config);
  }
}

一旦您已经包含了entityManager，现在您可以在您的网站上使用它了。

$doctrine = new Doctrine();
$user = new models\User;
$doctrine->em->persist($user);
$doctrine->em->flush();

至少这篇文章可以帮助您了解如何安装和使用Doctrine

- manix

Answer 2

Doctrine 2.5.4

使用命名空间

namespace DB;

use Doctrine\ORM\Tools\Setup;
use Doctrine\ORM\EntityManager;

class Doctrine
{
    public $em;

    public function __construct()
    {
        $paths = array("src/Application/Models/Entity");
        $isDevMode = false;

        // the connection configuration
        $dbParams = array(
            'driver' => 'pdo_mysql',
            'user' =>     'USER',
            'password' => 'PASS',
            'host' =>     'HOST',
            'dbname' =>   'DB_NAME',
        );

        $config = Setup::createAnnotationMetadataConfiguration($paths, $isDevMode, null, null, false);

        $this->em = EntityManager::create($dbParams, $config);

    }
}

在src\Application\Models\Entity中创建文章实体。

namespace Application\Models\Entity;

use Doctrine\ORM\Mapping as ORM;
/**
 * @ORM\Entity
 * @ORM\HasLifecycleCallbacks()
 * @ORM\Table(name="article")
 * @ORM\Entity(repositoryClass="Application\Models\Entity\ArticleRepository")
 */
class Article
{
    /**
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue
     */
    private $id;

    /**
     * @var string $title
     *
     * @ORM\Column(type="text", length=255, nullable=true)
     */
    protected $title;

    /**
     * @var text $body
     *
     * @ORM\Column(type="text", nullable=true)
     */
    protected $body;

    /**
     * @var datetime $createdAt
     *
     * @ORM\Column(type="datetime", name="created_at")
     */
    private $createdAt;

现在从你的类中调用实体管理器：

$doctrine = new Doctrine();
$article = $doctrine->em->find('Application\Models\Entity\Article', 1);

- Mohamed Ben HEnda