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 {
     #[ORM\ManyToOne(targetEntity: Article::class, inversedBy: 'translations')]
     #[ORM\JoinColumn(name: 'object_id', referencedColumnName: 'id', onDelete: 'CASCADE')]
-    protected $object = null;
+    protected ?\Article $object = null;
 }
 
 #[ORM\Entity]

PHP snippet to change

<?php

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\Common\Collections\Collection;
use Doctrine\DBAL\Types\Types;
use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;

#[ORM\Table(name: 'article_translations')]
#[ORM\Entity]
class PersonalArticleTranslation extends AbstractPersonalTranslation
{
    #[ORM\ManyToOne(targetEntity: Article::class, inversedBy: 'translations')]
    #[ORM\JoinColumn(name: 'object_id', referencedColumnName: 'id', onDelete: 'CASCADE')]
    protected $object = null;
}

#[ORM\Entity]
class Article {
    #[ORM\Id]
    #[ORM\GeneratedValue]
    #[ORM\Column(type: Types::INTEGER)]
    private ?int $id = null;
    
    /**
     * @var \Doctrine\Common\Collections\Collection<int, \PersonalArticleTranslation>
     */
    #[ORM\OneToMany(targetEntity: PersonalArticleTranslation::class, mappedBy: 'object')]
    private Collection $translations;
    
    public function __construct()
    {
        $this->translations = new ArrayCollection();
    }
    
    public function getTranslations(): Collection
    {
        return $this->translations;
    }
    
    public function addTranslation(PersonalArticleTranslation $t): void
    {
        if (!$this->translations->contains($t)) {
            $this->translations[] = $t;
            $t->setObject($this);
        }
    }
}

#[ORM\MappedSuperclass]
abstract class AbstractPersonalTranslation
{
    #[ORM\Column(type: Types::INTEGER)]
    #[ORM\Id]
    #[ORM\GeneratedValue(strategy: 'IDENTITY')]
    protected ?int $id = null;

    protected $object;

    public function getId()
    {
        return $this->id;
    }

    public function setObject($object)
    {
        $this->object = $object;

        return $this;
    }

    public function getObject()
    {
        return $this->object;
    }
}

Applied Rules:

TypedPropertyFromToOneRelationTypeRector

Not a change you expect?

Create an issue on GitHub
...or to speed up fix – add a test fixture

Config rector.php

<?php

use Rector\Config\RectorConfig;
use Rector\Doctrine\Set\DoctrineSetList;
use Rector\Set\ValueObject\LevelSetList;

return RectorConfig::configure()
   
    ->withSets([DoctrineSetList::DOCTRINE_CODE_QUALITY, LevelSetList::UP_TO_PHP_81])
;

Rector version: 57c164 - released at 2025-05-13 11:28