AppBundle\\Entity\\User#$class_cat\", got \"integer\" instead - symfony

Question

Hi i got this error while data insert in database please let me know where is the problem i am new in symfony
"Expected value of type \"AppBundle\Entity\Class_cat\" for
association field \"AppBundle\Entity\User#$class_cat\", got
\"integer\" instead.",
"class": "Doctrine\ORM\ORMInvalidArgumentException"
this is User entity
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* User
*
* #ORM\Table(name="user")
* #ORM\Entity(repositoryClass="AppBundle\Repository\UserRepository")
*/
class User
{
/**
* Constructor
*/
public function __construct()
{
$this->class_cat = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="name", type="string", length=255)
*/
private $name;
/**
* #var string
*
* #ORM\Column(name="role", type="string", length=255)
*/
private $role;
/**
* #ORM\ManyToOne(targetEntity="Class_cat", inversedBy="users")
* #ORM\JoinColumn(name="class_id", referencedColumnName="id")
*/
private $class_cat;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set name
*
* #param string $name
*
* #return User
*/
public function setName($name)
{
$this->name = $name;
return $this;
}
/**
* Get name
*
* #return string
*/
public function getName()
{
return $this->name;
}
/**
* Set role
*
* #param string $role
*
* #return User
*/
public function setRole($role)
{
$this->role = $role;
return $this;
}
/**
* Get role
*
* #return string
*/
public function getRole()
{
return $this->role;
}
/**
* #return mixed
*/
public function getClassCat()
{
return $this->class_cat;
}
/**
* #param mixed $class_cat
*/
public function setClassCat($class_cat)
{
$this->class_cat = $class_cat;
}
this is class_cat enity
class Class_cat {
/**
* Constructor
*/
public function __construct()
{
$this->users = new \Doctrine\Common\Collections\ArrayCollection();
}
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="class_name", type="string", length=255)
*/
private $className;
/**
* #ORM\OneToMany(targetEntity="User", mappedBy="class_cat")
*/
protected $users;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set className
*
* #param string $className
*
* #return Class_cat
*/
public function setClassName($className)
{
$this->className = $className;
return $this;
}
/**
* Get className
*
* #return string
*/
public function getClassName()
{
return $this->className;
}
public function getUsers()
{
return $this->users;
}
/**
* #param mixed $users
*/
public function setUsers($users)
{
$this->users = $users;
}
this is controller code
> public function postAction(Request $request)
> {
> $data = new User;
> $name = $request->get('name');
> $role = $request->get('role');
> $class = $request->get('class_id');
> if (empty($name) || empty($role) || empty($class)) {
> return new View("NULL VALUES ARE NOT ALLOWED", Response::HTTP_NOT_ACCEPTABLE);
> }
> $data->setName($name);
> $data->setRole($role);
> $data->setClassId(1);
> $em = $this->getDoctrine()->getManager();
> $em->persist($data);
> $em->flush();
> return new View("User Added Successfully", Response::HTTP_OK);
> }

Answer 1

You need to pass the entity not the id for example:
$em = $this->getDoctrine()->getManager();
$classCat = $em->getRepository('AppBundle:ClassCat')->find(1);
$data->setClassCat($classCat);

Answer 2

Hi instead of passing integer value you need to pass an object of class Class_cat.
When you mapped any entity field to any other entity symfony need object to set.
So your solution is simple to try something like this:
public function postAction(Request $request){
$em = $this->getDoctrine()->getManager();
$data = new User;
$name = $request->get('name');
$role = $request->get('role');
$class = $request->get('class_id');
if (empty($name) || empty($role) || empty($class)) {
return new View("NULL VALUES ARE NOT ALLOWED",
Response::HTTP_NOT_ACCEPTABLE);
}
$classCat = $em->getRepository('AppBundle:ClassCat')->find($class);
$data->setName($name);
$data->setRole($role);
$data->setClassId($classCat);
$em->persist($data);
$em->flush();
return new View("User Added Successfully", Response::HTTP_OK);
}

Answer 3

Instead of integer value in
use object like this:
$data->setClassId(1);
$em = $this->getDoctrine()->getManager();
$classCat = $em->getRepository('AppBundle:ClassCat')->find(1);
$data->setClassCat($classCat);