Var filled with object suddenly null, what happened? - php

Question

I am building this form in symfony 2.0 and for some reason when I retrieve a object from the db and put it into an object it is gone when I want to save it so I get the following error:
Catchable Fatal Error: Argument 1 passed to MelvinLoos\CMS\CoreBundle\Entity\Page::setParent()
must be an instance of MelvinLoos\CMS\CoreBundle\Entity\Page, null given,
called in vendor\symfony\src\Symfony\Component\Form\Util\PropertyPath.php on line 347
and defined in src\MelvinLoos\CMS\CoreBundle\Entity\Page.php line 233
My code:
public function popupChildAction($parentid)
{
$entity = new Page();
$entity->setWebsite($this->getWebsite());
$parent = $this->getDoctrine()
->getRepository('MelvinLoosCMSCoreBundle:Page')
->findOneById($parentid);
if (!$parent)
{
throw $this->createNotFoundException('No parent found with given id: "' . $parentid . '"');
}
$entity->setParent($parent);
$entity->setCreatedBy($this->getUser());
//$entity->setPageType();
$form = $this->createForm(new PageChildType(), $entity);
$request = $this->getRequest();
$form->bindRequest($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getEntityManager();
$em->persist($entity);
$em->flush();
return $this->redirect($this->generateUrl('page_show', array('id' => $entity->getId())));
}
return $this->render('MelvinLoosCMSCoreBundle:Page:new_popup.html.twig', array(
'entity' => $entity,
'form' => $form->createView(),
'parent' => $parent
));
}
As you can see I put in a if statement to check if $parent is filled and I also tried a var_dump to double check, it is defiantly filled with an object. But for some reason when I call the setParent() function of the entity object it fills it with null.

Answer 1

Melvin you have the check if the form is submitted and to get your entity from the form.
Can you try like this?
$form = $this->createForm(new PageChildType(), $entity);
$request = $this->getRequest();
if ($request->getMethod() == 'POST') {
$form->bindRequest($request);
if ($form->isValid()) {
$entity = $form->getData();
$em = $this->getDoctrine()->getEntityManager();
$em->persist($entity);
$em->flush();
return $this->redirect($this->generateUrl('page_show', array('id' => $entity->getId())));
}
}

Answer 2

Totally forgot that I had this question still floating around... Anyway I got around my problem, still don't know why I got the error but I solved it with quite a easy solution.
Instead of setting the parent for the child, I did the reverse and set the child for the parent. My code is the following (There is also new code in there that's irrelevant because I fixed it some time ago).
public function popupChildAction($parentid)
{
$parent = $this->getDoctrine()
->getRepository('MelvinLoosCMSCoreBundle:Page')
->findOneById($parentid);
if (!$parent)
{
throw $this->createNotFoundException('No parent found with given id: "' . $parentid . '"');
}
$entity = new Page();
$entity->setWebsite($this->getWebsite());
$entity->setCreatedBy($this->getUser());
$form = $this->createForm(new PageChildType(), $entity);
$request = $this->getRequest();
$form->bindRequest($request);
if ($form->isValid()) {
$em = $this->getDoctrine()->getEntityManager();
$parent->setChildren($entity);
$em->persist($entity);
$em->flush();
return $this->redirect($this->generateUrl('page_show', array('id' => $entity->getId())));
}
return $this->render('MelvinLoosCMSCoreBundle:Page:new_popup.html.twig', array(
'entity' => $entity,
'form' => $form->createView(),
'parent' => $parent
));
}
Like I said there is newer code that is irrelevant but what it's all about is the part with
$parent->setChildren($entity); and now it works... hope this helps someone!
Thanks for everyone that gave input!