public function myAction(Request $request)
 {
     // create a task and give it some dummy data for this example
     $task = new Student();
     $task->setTask('Write a blog post');
     $task->setDueDate(new \DateTime('tomorrow'));
     $form = $this->createFormBuilder($task)->add('task', TextType::class)->add('dueDate', DateType::class)->add('save', SubmitType::class, array('label' => 'Create Task'))->getForm();
     return $this->render('default/new.html.twig', array('form' => $form->createView()));
 }