Self referencing children not attached - symfony

Question

I have a family tree like that:
class Family
{
/**
* #var integer
*
* #ORM\Column(type="integer", nullable=false)
* #ORM\Id
* #ORM\GeneratedValue(strategy="IDENTITY")
*/
private $id;
/**
* #var Family
*
* #ORM\ManyToOne(targetEntity="Family", inversedBy="children")
*/
private $parent;
/**
* #var string
*
* #ORM\Column(name="name", type="string")
*/
private $name;
/**
* #var ArrayCollection
*
* #ORM\OneToMany(targetEntity="Family", mappedBy="parent")
*/
private $children;
// [...]
}
I'm trying to findAll() and get the parent and children attached
$familyRepo = $this->em->getRepository(Family::class);
$families = $familyRepo->findAll();
foreach ($families as $family) {
dump($family->getParent()->getName());
}
I can see the parents name dumped and only one query executed, so they are well attached.
However if I try to show the children:
dump($family->getChildren()->count());
I'm seeing as much queries as there are families.
How can I get the children attached as the parents are ? (without more queries)
What am I forgetting ?

Answer 1

On the one-to-many relation for $children you can specify to fetch objects eagerly as follows:
/**
* #var ArrayCollection
*
* #ORM\OneToMany(targetEntity="Family", mappedBy="parent", fetch="EAGER")
*/
private $children;
See also the docs for other params.

Answer 2

Following #dlondero's suggestion, I forced the deep fetch into the repository.
Here is how I did:
public function getRootNodes($eagerLevels = 5)
{
$qb = $this->createQueryBuilder('entity0')
->select('partial entity0.{id, name, parent}')
->where('entity0.parent IS NULL')
;
for ($i = 0; $i < $eagerLevels; $i++) {
$qb
->leftJoin('entity'.$i.'.children', 'entity'.($i+1))
->addSelect('partial entity'.($i+1).'.{id, name, parent}')
;
}
return $qb->getQuery()->getResult();
}
This partially fetches just what I need so no lazy loading happens.
I also made the level of deepness configurable.