Iterate or count ArrayCollection from twig - symfony

Question

symfony 2.8
Ok, I have a Category entity which looks like this:
class Category
{
// ... //
/**
* #ORM\OneToMany(targetEntity="Classified", mappedBy="category")
*/
private $classified;
// ... //
public function __construct()
{
$this->classified = new ArrayCollection();
}
}
and the Classified entity looks like this:
Class Classified
{
/**
* #ORM\ManyToOne(targetEntity="Category", inversedBy="classified")
*/
private $category;
}
In my result.html.twig I called to render the controller like this:
{{ render(controller('ClassifiedBundle:Category:displayCategoryPanelList'))}}
which basically calls Category Controller
class CategoryController extends Controller
{
public function displayCategoryPanelListAction(Request $request)
{
$em = $this->getDoctrine()->getManager();
$categories = $em->getRepository('ClassifiedBundle:Category')
->findAllOrderedByName();
return $this->render('ClassifiedBundle:Front/Widgets:category-panel-list.html.twig',
array(
'categories' => $categories
));
}
}
which in turn calls the CategoryRepository for query:
class CategoryRepository extends EntityRepository
{
public function findAllOrderedByName()
{
$query = $this->createQueryBuilder('c')
->select('c, cc')
->leftJoin('c.classified', 'cc')
->orderBy('c.name', 'ASC')
->getQuery()
->getResult();
return $query;
}
}
which in the end is rendered to category-panel-list.html.twig:
<ul>
{% for c in categories %}
<li>
<a href="#">
<i class="fa {{ c.icon }}"></i>
{{ c.name }} <span class="category-counter">{# COUNT SHOULD GO HERE#}</span>
</a>
</li>
{% endfor %}
</ul>
Now, all these work fine apart from the counting classified arraycollection part. I have tried {{ c.classified|length }} but this gives a fatal error.
The dump looks good and I can see the entry for the classified collection, but just don't know how to count them. Some categories have empty classified collection.

Answer 1

{{ c.classified|length }} is applied to an array.
Your object c.classified is a PersistCollection, not an array.
You should use {{ c.classified.count }}

Answer 2

You could try just using the doctrine method
{{ c.classified.count }}