Symfony createQuery winth multiple table - sql

Question

I would like to recover the user who wrote the post, only I have an error when I try to do it "Attempted to call an undefined method named "getIdPost" of class "App\Entity\User"."
$em = $this->getDoctrine()->getManager();
$query = $em->createQuery( //creation de la requête
'SELECT p , u
FROM App\Entity\User u, App\Entity\Post p
WHERE p.Id_Post_Parent IS NULL
AND p.Id_User = u.idUser
ORDER BY p.Post_Date_Time DESC'
)->setMaxResults(10);
$posts = $query->getResult();
$publicPosts = array();
$comments = array();
for($i = 0; $i<sizeof($posts) ; $i++){
$publicPosts[$i] = $posts[$i]->getArray();
//récupération des commentaires
$em = $this->getDoctrine()->getManager(); //on appelle Doctrine
$query = $em->createQuery( //creation de la requête
'SELECT p , u
FROM App\Entity\User u, App\Entity\Post p
WHERE p.Id_Post_Parent = :idParent
AND p.Id_User = u.idUser'
)->setParameter('idParent', $posts[$i]->getIdPost())
->setMaxResults(10); //On limite à 10 commentaires par posts
$comments[$i] = $query->getResult(); //variable qui récupère la requête
}
If I remove the User entity of the query it works and I have no error ... I do not understand what it's due, why it tells me that there is no method "getIdPost" in user? This is normal since it is a method of "Post" :x

Answer 1

you would like the user who wrote the post it's a bit weird to get it from a query don't you have a $post->getUser() ? I think you should join the table to acheive that
$query = $em->createQuery( //creation de la requête
'SELECT u
FROM App\Entity\User u,
LEFT JOIN App\Entity\Post p on p.Id_User = u.idUser
WHERE p.Id_Post_Parent IS NULL
ORDER BY p.Post_Date_Time DESC'
)->setMaxResults(10);