如果您使用ConnectionFactory，则附加到连接的事件订阅者将停止工作，例如 stofDoctrineExtensions。
这是我的方法。我和ConnectionFactory 一样有空连接和EntityManager。在工作时，我只是用反射替换连接配置。适用于 SF 2.0.10 ;)
class YourService extends ContainerAware
{
public function switchDatabase($dbName, $dbUser, $dbPass)
{
$connection = $this->container->get(sprintf('doctrine.dbal.%s_connection', 'dynamic_conn'));
$connection->close();
$refConn = new \ReflectionObject($connection);
$refParams = $refConn->getProperty('_params');
$refParams->setAccessible('public'); //we have to change it for a moment
$params = $refParams->getValue($connection);
$params['dbname'] = $dbName;
$params['user'] = $dbUser;
$params['password'] = $dbPass;
$refParams->setAccessible('private');
$refParams->setValue($connection, $params);
$this->container->get('doctrine')->resetEntityManager('dynamic_manager'); // for sure (unless you like broken transactions)
}
}
更新：
为 php5.4 创建的教义 2.2 / sf 2.3（无重新选择）更优雅的解决方案（我喜欢新的数组初始化器：D）
我们可以使用称为连接包装器的学说特性，请参阅http://docs.doctrine-project.org/projects/doctrine-dbal/en/latest/reference/portability.html
此示例使用会话服务来临时存储连接详细信息。
首先我们必须创建特殊的连接包装器：
namespace w3des\DoctrineBundle\Connection;
use Doctrine\DBAL\Connection;
use Symfony\Component\HttpFoundation\Session\Session;
use Doctrine\Common\EventManager;
use Doctrine\DBAL\Events;
use Doctrine\DBAL\Event\ConnectionEventArgs;
/*
* @author Dawid zulus Pakula [zulus@w3des.net]
*/
class ConnectionWrapper extends Connection
{
const SESSION_ACTIVE_DYNAMIC_CONN = 'active_dynamic_conn';
/**
* @var Session
*/
private $session;
/**
* @var bool
*/
private $_isConnected = false;
/**
* @param Session $sess
*/
public function setSession(Session $sess)
{
$this->session = $sess;
}
public function forceSwitch($dbName, $dbUser, $dbPassword)
{
if ($this->session->has(self::SESSION_ACTIVE_DYNAMIC_CONN)) {
$current = $this->session->get(self::SESSION_ACTIVE_DYNAMIC_CONN);
if ($current[0] === $dbName) {
return;
}
}
$this->session->set(self::SESSION_ACTIVE_DYNAMIC_CONN, [
$dbName,
$dbUser,
$dbPass
]);
if ($this->isConnected()) {
$this->close();
}
}
/**
* {@inheritDoc}
*/
public function connect()
{
if (! $this->session->has(self::SESSION_ACTIVE_DYNAMIC_CONN)) {
throw new \InvalidArgumentException('You have to inject into valid context first');
}
if ($this->isConnected()) {
return true;
}
$driverOptions = isset($params['driverOptions']) ? $params['driverOptions'] : array();
$params = $this->getParams();
$realParams = $this->session->get(self::SESSION_ACTIVE_DYNAMIC_CONN);
$params['dbname'] = $realParams[0];
$params['user'] = $realParams[1];
$params['password'] = $realParams[2];
$this->_conn = $this->_driver->connect($params, $params['user'], $params['password'], $driverOptions);
if ($this->_eventManager->hasListeners(Events::postConnect)) {
$eventArgs = new ConnectionEventArgs($this);
$this->_eventManager->dispatchEvent(Events::postConnect, $eventArgs);
}
$this->_isConnected = true;
return true;
}
/**
* {@inheritDoc}
*/
public function isConnected()
{
return $this->_isConnected;
}
/**
* {@inheritDoc}
*/
public function close()
{
if ($this->isConnected()) {
parent::close();
$this->_isConnected = false;
}
}
}
接下来在你的学说配置中注册它：
…
connections:
dynamic:
driver: %database_driver%
host: %database_host%
port: %database_port%
dbname: 'empty_database'
charset: UTF8
wrapper_class: 'w3des\DoctrineBundle\Connection\ConnectionWrapper'
我们的 ConnectionWrapper 已正确注册。现在会话注入。
首先创建特殊的 CompilerPass 类：
namespace w3des\DoctrineBundle\DependencyInjection\CompilerPass;
use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\ContainerBuilder;
use Symfony\Component\DependencyInjection\Definition;
use Symfony\Component\DependencyInjection\Reference;
class ConnectionCompilerPass implements CompilerPassInterface
{
/**
* {@inheritDoc}
*/
public function process(ContainerBuilder $container)
{
$connection = $container
->getDefinition('doctrine.dbal.dynamic_connection')
->addMethodCall('setSession', [
new Reference('session')
]);
}
}
我们在 *Bundle 类中记录我们新的编译器类：
public function build(ContainerBuilder $container)
{
parent::build($container);
$container->addCompilerPass(new ConnectionCompilerPass());
}
仅此而已！
将根据会话属性按需创建连接。
要切换数据库，只需使用：
$this->get('doctrine.dbal.dynamic_connection')->forceSwitch($dbname, $dbuser, $dbpass);
优势
- 不再反思
- 按需创作
- 优雅而强大
缺点
- 您必须手动清理您的实体管理器，或为此创建特殊的学说事件
- 更多代码