Symfony2 Entity Manager - Basic Operations

Some easy snippets ...

1. howto get the EM :

   $em = $this->get('doctrine')->getEntityManager();

2. howto quick find:

   $this->getDoctrine()->getRepository('DemoUserBundle:User')->find(1);

3. persist data :

   $user = new User();
   $user->setName("asd");
   $em->persist($user);
   try {
   $em->flush();
   } catch (\Exception $exc) {
   //something...
   }

Note: \Exception and NOT Exception.