Symfony/Doctrine ManyToMany按照分配或保存的顺序获取记录

/**
 * @ORM\Entity
 */
class Entity1
{
    // ...

    /**
     * @ORM\ManyToMany(targetEntity="Entity2")
     * @ORM\JoinTable(name="entity1_entity2",
     *      joinColumns={@ORM\JoinColumn(name="entity1_id", referencedColumnName="id")},
     *      inverseJoinColumns={@ORM\JoinColumn(name="entity2_id", referencedColumnName="id")}
     * )
     */
    private $entity2s;

    // ...
}

$entity1 = $entityManager->getRepository(Entity1::class)->find($entity1Id);
$entity2s = $entity1->getEntity2s();

$entity2s = $entity1->getEntity2s()->toArray();
usort($entity2s, function($a, $b) {
    return $a->getId() - $b->getId();
});