getNickname() is undefined - symfony

Question

I've these two entities:
Event:
class Event
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="title", type="string", length=255)
*/
private $title;
/**
* #var string
*
* #ORM\Column(name="description", type="string", length=255)
*/
private $description;
/**
* #var boolean
*
* #ORM\Column(name="invitationPermission", type="boolean")
*/
private $invitationPermission;
/**
* #var \DateTime
*
* #ORM\Column(name="creationDate", type="date")
*/
private $creationDate;
/**
* #var \DateTime
*
* #ORM\Column(name="modifiedDate", type="date")
*/
private $modifiedDate;
/**
* #ORM\OneToMany(targetEntity="Users", mappedBy="id")
*/
private $user;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set title
*
* #param string $title
* #return Event
*/
public function setTitle($title)
{
$this->title = $title;
return $this;
}
/**
* Get title
*
* #return string
*/
public function getTitle()
{
return $this->title;
}
/**
* Set description
*
* #param string $description
* #return Event
*/
public function setDescription($description)
{
$this->description = $description;
return $this;
}
/**
* Get description
*
* #return string
*/
public function getDescription()
{
return $this->description;
}
/**
* Set invitationPermission
*
* #param boolean $invitationPermission
* #return Event
*/
public function setInvitationPermission($invitationPermission)
{
$this->invitationPermission = $invitationPermission;
return $this;
}
/**
* Get invitationPermission
*
* #return boolean
*/
public function getInvitationPermission()
{
return $this->invitationPermission;
}
/**
* Set creationDate
*
* #param \DateTime $creationDate
* #return Event
*/
public function setCreationDate($creationDate)
{
$this->creationDate = $creationDate;
return $this;
}
/**
* Get creationDate
*
* #return \DateTime
*/
public function getCreationDate()
{
return $this->creationDate;
}
/**
* Set modifiedDate
*
* #param \DateTime $modifiedDate
* #return Event
*/
public function setModifiedDate($modifiedDate)
{
$this->modifiedDate = $modifiedDate;
return $this;
}
/**
* Get modifiedDate
*
* #return \DateTime
*/
public function getModifiedDate()
{
return $this->modifiedDate;
}
/**
* Set user
*
* #param user $user
* #return Event
*/
public function setUser($user)
{
$this->user = $user;
return $this;
}
/**
* Get user
*
* #return user
*/
public function getUser()
{
return $this->user;
}
And Users:
class Users
{
/**
* #var integer
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var string
*
* #ORM\Column(name="email", type="string", length=255)
*/
private $email;
/**
* #var string
*
* #ORM\Column(name="nick", type="string", length=255)
*/
private $nick;
/**
* #var string
*
* #ORM\Column(name="pwd", type="string", length=255)
*/
private $pwd;
/**
* Get id
*
* #return integer
*/
public function getId()
{
return $this->id;
}
/**
* Set email
*
* #param string $email
* #return Users
*/
public function setEmail($email)
{
$this->email = $email;
return $this;
}
/**
* Get email
*
* #return string
*/
public function getEmail()
{
return $this->email;
}
/**
* Set nick
*
* #param string $nick
* #return Users
*/
public function setNick($nick)
{
$this->nick = $nick;
return $this;
}
/**
* Get nick
*
* #return string
*/
public function getNick()
{
return $this->nick;
}
/**
* Set pwd
*
* #param string $pwd
* #return Users
*/
public function setPwd($pwd)
{
$this->pwd = $pwd;
return $this;
}
/**
* Get pwd
*
* #return string
*/
public function getPwd()
{
return $this->pwd;
}
}
And I try to get an Event, and then by Event, get the User and then, it's Nickname:
$event = $em->getRepository('MyBundle:Event')->findOneById(1);
print_r($event->getUser()->getNickname());
And I'm getting:
Fatal error: Call to undefined method Doctrine\ORM\PersistentCollection::getNickname() in C:\xampp\htdocs\web\src\KNV\MyBundle\Controller\DefaultController.php on line 43
Any idea?
However, if I print the result of getUser() it's returning a big load of data (Most related with symfony framework).

Answer 1

First, there is no getNickname() method within your User entity, you should then use getNick().
But I think the problem is elsewhere, You defined a oneToMany relation betweet Event and User. So, an event could be related to many users. Then, if you call getUser() on a given event you'll then get a collection of users. You should then iterate to get single users objects upon which you can call getNick().