Catching database exceptions in Symfony2

Question

I\'ve got a random problem that I can\'t narrow down. Occasionally, I will get the following error in a Symfony2 application:

Uncaught Exception: An e

Answer 1

You need to create custom exception listener. It will listen to all exceptions, but you will specify type check inside it.

In your services.yml you need to specify listener:

kernel.listener.your_pdo_listener:
        class: Acme\AppBundle\EventListener\YourExceptionListener
        tags:
           - { name: kernel.event_listener, event: kernel.exception, method: onPdoException }

Now you need to create this class:

YourExceptionListener:

use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
class YourExceptionListener
{
     public function onPdoException(GetResponseForExceptionEvent $event)
     {
          $exception = $event->getException();

          if ($exception instanceof PDOException) {
              //now you can do whatever you want with this exception
          }
     }
}

Check doc how to create event listener