gistfile1.txt

$user = new \SndAdmin\Entity\User();
$role = new \SndAdmin\Entity\UserRole();

$role->setRole('loser');

$user->setRole($role);

$em->persist($user);
$em->flush();


I would expect UserRole to have user_id set and (pointing to the user that was created and saved to the database, but the user_id field is null, as var_dumps shows.

object(SndAdmin\Entity\User)[603]
  protected 'role' => 
    object(SndAdmin\Entity\UserRole)[602]
      private 'id' => null
      private 'user' => null
      private 'role' => string 'loser' (length=5)
  private 'created' => null
  private 'updated' => null
  protected 'id' => null
  protected 'username' => null
  protected 'email' => string '0b9b6d6d154e98ce34b3f2e4ef76eae9@e3844e186e6eb8736e9f53c0c5889527.nl' (length=68)
  protected 'displayName' => null
  protected 'password' => string 'b139e104214a08ae3f2ebcce149cdf6e' (length=32) 




<?php

namespace SndAdmin\Entity;

use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;
use ZfcUser\Entity\UserInterface;

/**
 * @ORM\Entity
 * @ORM\Table(name="user")
 */
class User extends \ZfcUserDoctrineORM\Entity\User
{
    /**
     * @ORM\OneToOne(targetEntity="SndAdmin\Entity\UserRole", mappedBy="user", cascade={"persist", "remove", "merge"}, orphanRemoval=true)
     *
     * @var \SndAdmin\Entity\UserRole $role
     */
    protected $role;

    /**
     * @Gedmo\Timestampable(on="create")
     * @ORM\Column(type="datetime")
     */
    private $created;

    /**
     * @Gedmo\Timestampable(on="update")
     * @ORM\Column(type="datetime")
     */
    private $updated;

    /**
     * @param \SndAdmin\Entity\UserRole $role
     */
    public function setRole($role)
    {
        $this->role = $role;
    }

    /**
     * @return \SndAdmin\Entity\UserRole
     */
    public function getRole()
    {
        return $this->role;
    }

    public function setCreated($created)
    {
        $this->created = $created;
    }

    public function getCreated()
    {
        return $this->created;
    }

    public function setUpdated($updated)
    {
        $this->updated = $updated;
    }

    public function getUpdated()
    {
        return $this->updated;
    }


}
=======================================
<?php

namespace SndAdmin\Entity;

use Doctrine\ORM\Mapping as ORM;

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

    /**
     * @ORM\OneToOne(targetEntity="SndAdmin\Entity\User", inversedBy="role", cascade={"persist", "remove", "merge"}, orphanRemoval=true)
     * @ORM\JoinColumn(name="user_id", referencedColumnName="user_id")
     *
     * @var \SndAdmin\Entity\User
     */
    private $user;

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

    /**
     * @param int $id
     */
    public function setId($id)
    {
        $this->id = $id;
    }

    /**
     * @return int
     */
    public function getId()
    {
        return $this->id;
    }

    /**
     * @param string $role
     */
    public function setRole($role)
    {
        $this->role = $role;
    }

    /**
     * @return string
     */
    public function getRole()
    {
        return $this->role;
    }

    /**
     * @param \SndAdmin\Entity\User $user
     */
    public function setUser($user)
    {
        $this->user = $user;
    }

    /**
     * @return \SndAdmin\Entity\User
     */
    public function getUser()
    {
        return $this->user;
    }

}

-- Table structure for table user_role_linker

CREATE TABLE user_role_linker (
id int(11) NOT NULL AUTO_INCREMENT,
user_id int(11) DEFAULT NULL,
role_id varchar(255) COLLATE utf8_unicode_ci NOT NULL,
PRIMARY KEY (id),
UNIQUE KEY UNIQ_61117899A76ED395 (user_id)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

-- Dumping data for table user_role_linker

INSERT INTO user_role_linker VALUES
(6, NULL, 'loser');

-- Constraints for dumped tables

-- Constraints for table user_role_linker

ALTER TABLE user_role_linker
ADD CONSTRAINT FK_61117899A76ED395 FOREIGN KEY (user_id) REFERENCES user (user_id);