I am using Symfony 2.7.1 and I seem to have a problem while using my News Entity. I am trying to use the published_at in my twig template.

I tried using {{ news_item.published_at|date("m/d/Y") }} but that seems to follow up by a fatal error:

Method "published_at" for object "AppBundle\Entity\News" does not exist in AppBundle:news:index.html.twig at line 7

Line 7:

{{ news_item.published_at | date("m/d/Y") }}

I also get a 'Invalid entities' warning in the debug toolbar stating the following;

• AppBundle\Entity\Account
  • The association AppBundle\Entity\Account#articles refers to the owning side field AppBundle\Entity\News#author which is not defined as association, but as field.
  • The association AppBundle\Entity\Account#articles refers to the owning side field AppBundle\Entity\News#author which does not exist.

These are my files. I hope somebody can help me push me in the right direction:

src/AppBundle/Entity/News.php

class News
{
    /**
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @ORM\Column(name="title", type="string", length=255)
     */
    private $title;

    /**
     * @ORM\Column(name="body", type="text")
     */
    private $body;

    /**
     * @ORM\Column(name="author", type="integer")
     * @ORM\ManyToOne(targetEntity="AppBundle\Entity\Account", inversedBy="articles")
     */
    private $author;

    /**
     * @ORM\Column(name="published_at", type="datetime")
     */
    private $published_at;
}

src/AppBundle/Entity/Repositories/NewsRepository.php

class NewsRepository extends EntityRepository
{
    /**
     * @param $number
     * @return mixed
     * @throws \Doctrine\ORM\NonUniqueResultException
     */
    public function findLatest($number) {
        return $this->createQueryBuilder('a')
            ->orderBy('a.published_at', 'DESC')
            ->setMaxResults($number)
            ->getQuery()
            ->getResult();
    }
}

src/AppBundle/Entity/Account.php

class Account implements AdvancedUserInterface
{
    /**
     * @ORM\OneToMany(targetEntity="AppBundle\Entity\News", mappedBy="author")
     */
    protected $articles;
}