Symfony2 Doctrine combining three queries - symfony

Question

I'm building a simple task planner. This is a fragment from the file TaskController.php. How can I combine these 3 queries (tasks, notcompleted, completed) to make it work? Should I use DQL?
/**
* Lists all task entities.
*
* #Route("/", name="task_index")
* #Method("GET")
*/
public function indexAction()
{
$em = $this->getDoctrine()->getManager();
$tasks = $em->getRepository('TaskBundle:Task')->findByUser($this->getUser()); // all tasks of a specific user
$notcompleted = $em->getRepository('TaskBundle:Task')->findByCompleted(false); //tasks that are not completed
$completed = $em->getRepository('TaskBundle:Task')->findByCompleted(true); // all completed tasks
return $this->render('task/index.html.twig', array(
'notcompleted' => $notcompleted,
'completed' => $completed,
'tasks' => $tasks,
));
}

Answer 1

You can use Doctrine's \Doctrine\Common\Collections\Collection::partition() to split the tasks:
$em = $this->getDoctrine()->getManager();
$tasks = $em->getRepository('TaskBundle:Task')->findByUser($this->getUser());
$collection = new ArrayCollection($tasks);
list($completed, $notcompleted) = $collection->partition(function ($key, Task $task) {
return $task->isCompleted();
});
return $this->render('task/index.html.twig', array(
'notcompleted' => $notcompleted,
'completed' => $completed,
'tasks' => $tasks,
));

Answer 2

The simplest solution could be to filter tasks in the controller:
$em = $this->getDoctrine()->getManager();
$tasks = $em->getRepository('TaskBundle:Task')->findByUser($this->getUser());
$notcompleted = $completed = [];
foreach ($tasks as $task) {
if ($task->isCompleted()) {
$completed[] = $tasK;
} else {
$notcompleted[] = $task;
}
}
return $this->render('task/index.html.twig', array(
'notcompleted' => $notcompleted,
'completed' => $completed,
'tasks' => $tasks,
));
In this solution you are doing only one DB query, instead of three queries.