Symfony displaying object value in twig - php

Question

I have an entity Playlist that is related to another call Items.
I want to deploy on a twig template id of each of the items.
class Playlist
{
private $items;
public function __construct()
{
$this->items = new \Doctrine\Common\Collections\ArrayCollection();
}
public function addItem(\Publicartel\AppBundle\Entity\PlaylistContent $content)
{
$content->setPlaylist($this);
$this->duration += $content->getDuration();
$this->items->add($content);
return $this;
}
public function removeItem(\Publicartel\AppBundle\Entity\PlaylistContent $content)
{
$this->items->removeElement($content);
$this->duration -= $content->getDuration();
}
public function getItems()
{
return $this->items;
}
}
I want to deploy in the Playlist form the id of the item.
I've tried like so:
{% for content in edit_form.items %}
{{ content.getId() }}
{{ content.id() }}
{% endfor %}
But I get the following error:
Method "getId" for object "Symfony\Component\Form\FormView" does not
exist Method "id" for object "Symfony\Component\Form\FormView" does
not exist
I've added the id attribute to my FormType:
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('id')
->add('position')
->add('duration')
->add('playlist')
->add('content')
;
}
But I get the following error:
An exception has been thrown during the rendering of a template
("Catchable Fatal Error: Object of class
Symfony\Component\Form\FormView could not be converted to string")
I've also tried:
// Controller
$entity = $em->getRepository('PublicartelAppBundle:Playlist')->find($id);
return $this->render('PublicartelAppBundle:Playlist:edit.html.twig', array(
'entity' => $entity,
'edit_form' => $editForm->createView(),
'delete_form' => $deleteForm->createView(),
));
// Twig
{{ entity.items.id }}
But that too throws an error:
Method "id" for object "Doctrine\ORM\PersistentCollection" does not exist
Thanks!

Answer 1

Solution 1
Last part of your solution is the good one
$entity = $em->getRepository('PublicartelAppBundle:Playlist')->find($id);
return $this->render('PublicartelAppBundle:Playlist:edit.html.twig', array(
'entity' => $entity,
[...]
));
What isn't good is that snippet of code
{{ entity.items.id }}
You have to cycle over all items before print id out (from your error, is pretty clear)
{% for item in entity.items %}
{{ item.id }}
{% endfor %}
Solution 2 (Didn't tested)
You can, of course, access also data from underlying object of a form, without pass it from the controller. So you can change your snippet of code from
from
{% for content in edit_form.items %}
{{ content.getId() }}
{{ content.id() }}
{% endfor %}
to
{% for content in edit_form.vars.data %}
{{ content.id() }}
{% endfor %}
Your error was that you were trying to access FormView (passed from controller) and not entity "binded" to the form