Symfony optional one to one relationship - php

Question

I have one entity Photo and another PhotoNote ( 0 to 10 )
A photo can have note but can’t too
When I request a photo entity I get the following error
Entity of type 'App\Entity\PhotoNote' for IDs idPhoto(1737) was not found
Using this in my controller
$photo = $photoRepository->findOneBy(['idPhoto' => $idPhoto]);
// check if there is a note
$note = (null !== $photo->getPhotoNote() ? $photo->getPhotoNote()->getNotePhoto() : 0);
// Also tried following
//$note = (null !== $photo->getPhotoNote()->getNotePhoto() ? $photo->getPhotoNote()->getNotePhoto() : null);
/**
* --> this throws the error : $photo->getPhotoNote()->getNotePhoto()
*/
And here is the dumping of $photo->getPhotoNote() in App\Entity\Photo :
Photo.php on line 443:
Proxies\__CG__\App\Entity\PhotoNote {#5710 ▼
+__isInitialized__: false
-idPhoto: 1737
-notePhoto: null
…2
}
Actually $photo->getPhotoNote() is not null, and photoNote is populated with the photoId. When using $photo->getPhotoNote()->getNotePhoto() doctrine generates the query to get the associated note, but that photo doesn’t have a note. Note is not mandatory.
What I want is ‘getPhotoNote’ returns null or even 0 but seems that one to one relation requires an existing id.
How to say to doctrine returns null ?
Class Photo {
/**
* #var int
*
* #ORM\Column(name="id_photo", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $idPhoto.
// some fields
/**
* #ORM\OneToOne(targetEntity=“App\Entity\PhotoNote”)
* #ORM\JoinColumn(name="id_photo", referencedColumnName="id_photo", nullable=true)
*/
private $photoNote;
public function setPhotoNote(PhotoNote $photoNote = null)
{
$this->photoNote = $photoNote;
return $this;
}
public function getPhotoNote()
{
return $this->photoNote;
}
}
Class PhotoNote {
/**
* #ORM\Id()
* #ORM\Column(name="id_photo", type="integer")
*/
private $idPhoto;
/**
* #ORM\Column(name="note_photo", type="smallint")
*/
private $notePhoto;
public function getNotePhoto(): ?int
{
return $this->notePhoto;
}
public function setNotePhoto(int $notePhoto): self
{
$this->notePhoto = $notePhoto;
return $this;
}
}
Generated query :
SELECT
t0.id_photo AS id_photo_1,
t0.note_photo AS note_photo_2
FROM
photo_note t0
WHERE
t0.id_photo = 1737;

Answer 1

For now the only way that I found is to not use a relationship between these two entities.
I get the photo’s note using the associated repository with something like
$note = $photoNoteRepo->findOneBy([
'idPhoto' => $idPhoto
]);
if ( empty($note))
$note = null;
I think it’s should be better with relation but I’m stuck with this issue.
This is a working workaround but it’s not answering the issue.
Maybe someone here will give me a way to use the relationship.
EDIT
I found a way based on this
public function getPhotoNote()
{
if ($this->photoNote instanceof \Doctrine\ORM\Proxy\Proxy) {
try {
$this->photoNote->__load();
} catch (\Doctrine\ORM\EntityNotFoundException $e) {
return null;
}
}
return $this->photoNote;
}
I have read something about doctrine's events especially postLoad event which seems cleaner but I did not implement it with success yet