Symfony2 - Doctrine以一对一的关系保存entites

Question

I want to save a form that I have created but I have an error.

I have 3 entities:

class T {
    /**
     * @ORM\OneToOne(targetEntity="MyNameSpace\ProfileBundle\Entity\Person", cascade={"persist"})

     */
    private $information;
}

class Person {
    /**
     * @ORM\OneToOne(targetEntity="MyNameSpace\MediaBundle\Entity\Document", cascade={"persist"}))
     */
    private $photo_profile;
}

class Document
{
    private $file;
}

When I save my "T" class with this code :

public function createAction()
{
        $entity     = new T();                        
        $request = $this->getRequest();
        $form    = $this->createForm(new TType(), $entity);        
        $form->bindRequest($request);

        if ($form->isValid()) 
        {
            $em = $this->getDoctrine()->getEntityManager();
            $em->persist($entity);            
            $em->flush();
        }
} 

I have this error:

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails ( namespace . person , CONSTRAINT FK_3370D440809EFCB0 FOREIGN KEY ( photo_profile_id ) REFERENCES Document ( id ))

Any helps will be cool

Thank you for all

---

Here the code I have:

/**
 * Creates a new Tutor entity.
 */
public function createAction()
{       
    $entity  = new T();        
    $person = new Person();        

    $document = new Document();
    $person->setPhoto($document);

    $entity->setInformation($person);

    $request = $this->getRequest();
    $form    = $this->createForm(new TType(), $entity);        
    $form->bindRequest($request);

    if ($form->isValid()) {
        $em = $this->getDoctrine()->getEntityManager();

        $em->persist($entity->getInformation()->getPhoto());
        $em->persist($entity->getInformation());           
        $em->flush();

        $em->persist($entity);
        $em->flush();                       

        return $this->redirect($this->generateUrl('Index'));
    }

and I have this error:

SQLSTATE[23000]: Integrity constraint violation: 1452 Cannot add or update a child row: a foreign key constraint fails ( db . T , CONSTRAINT FK_58C6694C2EF03101 FOREIGN KEY ( information_id ) REFERENCES Person ( id ))

Any help please will be cool

Thanks

Answer 1

I ran into this issue as well and cascading didn't help so I ended up just using oneToMany, manyToOne relations instead.

The alternative solution I had was to not apply the foreign key constraints in the generated SQL but that would remove my --force ability (and force me to write my own script to ignore the FK constraints), so the oneToMany solution was more elegant for me.

Answer 2

I had the same issue with a ManyToOne relation;. I just had to :

1. persist the owner entity
2. flush
3. create the inverse and bind it
4. persist and flush again Then everything went normal !

Well I can't explain that but I just share my experience and maybe it will serve !

Answer 3

您正在尝试保存Person但您没有将与Document（必须命名为photo_profile）的关系指定为可为空，因此出现此错误。