Symfony Doctrine SortBy ToMany relation objects - symfony

Question

I have entity post and points, the are connected by oneToMany relation. I want make method that will return objects with most count of related comments.
Is it possible?
Please help, i don't have any idea.
https://www.doctrine-project.org/projects/doctrine-orm/en/2.6/tutorials/ordered-associations.html - should i use this?
entities:
post:
/**
* #ORM\Entity(repositoryClass="App\Repository\PostRepository")
*/
class Post
{
/**
* #ORM\Id()
* #ORM\GeneratedValue()
* #ORM\Column(type="integer")
*/
private $id;
/**
* #var Points
* #ORM\OneToMany(targetEntity="Points", mappedBy="post", fetch="EAGER")
*/
private $points;
/**
* #return Collection|Points[]
*/
public function getPoints(): Collection {
return $this->points;
}
...
points
/**
* #ORM\Entity(repositoryClass="App\Repository\PointsRepository")
*/
class Points
{
/**
* #ORM\Id()
* #ORM\GeneratedValue()
* #ORM\Column(type="integer")
*/
private $id;
/**
* #var Post
* #ORM\ManyToOne(targetEntity="Post", inversedBy="points", fetch="EAGER")
*/
private $post;
public function getPost(): Post {
return $this->post;
}
public function setPost(Post $post ){
$this->post = $post;
}
...

Answer 1

On the assumption that you are already able to return a post with its points you might try something like this:
in App\Repository\PostRepository:
public function postsByPoints() {
return $this->getEntityManager()->createQueryBuilder()
->select('p.post, count(pt.points) N)
->from('App:Points', 'pt')
->join('pt.post', 'p')
->where('some where clause') <- delete this if you're not selecting a subset
->groupBy('p.post')
->orderBy('N')
->getQuery()->getResult();
}
In some controller:
$em = $this->getDoctrine()->getManager();
$postsByPoints = $em->getRepository('App:Post')->postsByPoints();
NB: not tested

Answer 2

This is an working (for me) code
return $this->createQueryBuilder('p')
->innerJoin('p.user', 'c')
->innerJoin('p.points', 'pp')
->andWhere("p.date > '".$now->format("Y-m-d H:i:s")."'")
->setMaxResults($max)
->groupBy('pp.post')
->orderBy('pp.post','DESC')
->getQuery()
->getResult();