how test that the connection works in Doctrine 2? - doctrine-orm

Question

I'm looking for a way to test if a connection is working or not with Doctrine 2.
As in my application users can change by themselves the information connections, I want to check if the user has entered the right login and password.
How can I do that?
I tried to put this code into a try/catch block :
try{
$entityManager = $this->getEntityManager() ;
$repository = $entityManager->getRepository('Authentification\Entity\User');
$userToIdentify = $repository->findOneBy(array('login' => $this->_username, 'password' => $this->_password));
}catch(Exception $e){
$code = Result::FAILURE ;
$identity = "unknow" ;
$messages = array(
"message" => "Wrong login/password combination",
) ;
}
The problem is that even if the information connection is correct, I cannot catch the exception.
Otherwise I get the following error :
<b>Fatal error</b>: Uncaught exception 'Zend\View\Exception\RuntimeException'
with message 'Zend\View\Renderer\PhpRenderer::render: Unable to render template
"layout/layout"; resolver could not resolve to a file' in C:\xampp\htdocs\poemsV3\vendor\zendframework\zendframework\library\Zend\View\Renderer\PhpRenderer.php:451 Stack trace: #0 C:\xampp\htdocs\poemsV3\vendor\zendframework\zendframework\library\Zend\View\View.php(203): Zend\View\Renderer\PhpRenderer->render(Object(Zend\View\Model\ViewModel)) #1 C:\xampp\htdocs\poemsV3\vendor\zendframework\zendframework\library\Zend\Mvc\View\Http\DefaultRenderingStrategy.php(128): Zend\View\View->render(Object(Zend\View\Model\ViewModel)) #2 [internal function]: Zend\Mvc\View\Http\DefaultRenderingStrategy->render(Object(Zend\Mvc\MvcEvent))#3 C:\xampp\htdocs\poemsV3\vendor\zendframework\zendframework\library\Zend\EventManager\EventManager.php(469): call_user_func(Array, Object(Zend\Mvc\MvcEvent))#4 C:\xampp\htdocs\poemsV3\vendor\zendframework\zendframework\library\Zend\EventManager\EventMa in <b>C:\xampp\htdocs\poemsV3\vendor\zendframework\zendframework\library\Zend\View\Renderer\PhpRenderer.php</b> on line <b>451</b><br />
Do you have any idea in how I could test if the connection works?
Thank you.

Answer 1

Do not use the EntityManager directly. You can instead use following to check the connection parameters:
try {
$entityManager->getConnection()->connect();
} catch (\Exception $e) {
// failed to connect
}
That's sadly the only real way to check if something went wrong, since the exception type changes depending on the driver you use.
For the other exception (the view-related one) you simply have to adjust your view scripts path. I suggest you to keep the skeleton application module enabled so that the default layout is always there: you can override it at any time.

Answer 2

You can use.
$cnx = $this->getDoctrine()->getConnection();
$cnx->isConnected() ?
'Connected' :
'not connected';