Warning: get_class() expects parameter 1 to be object, integer given - php

Question

I don't know what's the problem when i want to insert some data to the database it show this error
<?php
namespace ArticleBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* ArticleRate
*
* #ORM\Table(name="article_rate")
* #ORM\Entity(repositoryClass="ArticleBundle\Repository\ArticleRateRepository")
*/
class ArticleRate
{
/**
* #var \DateTime
*
* #ORM\Column(name="date", type="date")
*/
private $date;
/**
* #var int
*
* #ORM\Id
* #ORM\OneToOne(targetEntity="Article")
* #ORM\JoinColumn(name="article_id", referencedColumnName="id")
*/
private $idArticle;
/**
* #var int
* #ORM\Id
* #ORM\OneToOne(targetEntity="GUBundle\Entity\Utilisateur")
*
* #ORM\JoinColumn(name="user_id", referencedColumnName="id")
*/
private $idUser;
public function __construct()
{
$this->date = new \DateTime();
}
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set date
*
* #param \DateTime $date
*
* #return ArticleRate
*/
public function setDate($date)
{
$this->date = $date;
return $this;
}
/**
* Get date
*
* #return \DateTime
*/
public function getDate()
{
return $this->date;
}
/**
* Set idArticle
*
* #param integer $idArticle
*
* #return ArticleRate
*/
public function setIdArticle($idArticle)
{
$this->idArticle = $idArticle;
return $this;
}
/**
* Get idArticle
*
* #return int
*/
public function getIdArticle()
{
return $this->idArticle;
}
/**
* Set idUser
*
* #param string $idUser
*
* #return ArticleRate
*/
public function setIdUser($idUser)
{
$this->idUser = $idUser;
return $this;
}
/**
* Get idUser
*
* #return string
*/
public function getIdUser()
{
return $this->idUser;
}
}
/**
* #param $id
* #return JsonResponse
*/
public function AimeArticlesAction($id)
{
$em = $this->getDoctrine()->getManager();
$article=new ArticleRate();
$article->setIdArticle(1);
$article->setIdUser(1);
dump($article);
$article=(object) $article;
$em->persist($article);
$em->flush();
return new JsonResponse("yes");
}
}

Answer 1

The error seems clear to me: you give an integer (1) and doctrine expects an object.
Doctrine is managing object. These mean you should use $article->getUser()->getId() instead of $article->getUserId().
For your specific probleme: those 2 functions expect objects
$article->setIdArticle(1);
$article->setIdUser(1);
That's why you should name those method Article And User.
You can give them an proxy object by using getReference
$article->setUser($this->getDoctrine()->getManager()->getReference(User:class, 1));
Please read the doctrine documentation it seems to me you are far from the good practices