I can't get objects of related entity in Symfony3 - php

Question

I use Symfony 3.2. I have two related entities:
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* #ORM\Entity(repositoryClass="AppBundle\Repository\UserRepository")
* #ORM\Table(name="user", options={"collate"="utf8mb4_unicode_ci", "charset"="utf8mb4"}, indexes={ #Index(name="idx_email", columns={"email"}) })
* #UniqueEntity(fields={"email"}, message="Пользователь с данным email'ом существует.", groups={"Registration"})
* #ORM\HasLifecycleCallbacks()
*/
class User
{
/**
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
* #ORM\Column(type="integer")
*/
private $id;
/**
*
* #ORM\OneToMany(targetEntity="AppBundle\Entity\VisitedPage", mappedBy="user")
*/
private $visitedPages;
public function __construct()
{
$this->visitedPages = new ArrayCollection();
}
public function addVisitedPage(VisitedPage $visitedPage)
{
$this->visitedPages[] = $visitedPage;
return $this;
}
/**
* Remove visitedPage
*
* #param \AppBundle\Entity\VisitedPage $visitedPage
*/
public function removeVisitedPage(\AppBundle\Entity\VisitedPage $visitedPage)
{
$this->visitedPages->removeElement($visitedPage);
}
/**
* Get visitedPages
*
* #return \Doctrine\Common\Collections\Collection
*/
public function getVisitedPages()
{
return $this->visitedPages;
}
}
<?php
namespace AppBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
/**
* VisitedPage
*
* #ORM\Table(name="visited_page")
* #ORM\Entity(repositoryClass="AppBundle\Repository\VisitedPageRepository")
*/
class VisitedPage
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
private $id;
/**
* #var User
*
* #ORM\ManyToOne(targetEntity="AppBundle\Entity\User", inversedBy="visitedPages")
*/
private $user;
/**
* #var string
* #ORM\Column(name="page", type="text")
*/
private $page;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set user
*
* #param \AppBundle\Entity\User $user
*
* #return VisitedPage
*/
public function setUser(\AppBundle\Entity\User $user = null)
{
$this->user = $user;
return $this;
}
/**
* Get user
*
* #return \AppBundle\Entity\User
*/
public function getUser()
{
return $this->user;
}
/**
* Set page
*
* #param string $page
*
* #return VisitedPage
*/
public function setPage($page)
{
$this->page = $page;
return $this;
}
/**
* Get page
*
* #return string
*/
public function getPage()
{
return $this->page;
}
}
When i try call VisitedPage::getUser() (i mean $visitedPage->getUser()) i get object type of user.
But when i call method User::getVisitedPages() i get null.
Method User::addVisitedPage($page) works and relations are saved.
How can i decide this problem?
//Some text to pass validation

Answer 1

When you add Visited Page from user try this:
class User
{
//......
public function addVisitedPage(VisitedPage $visitedPage)
{
$visitedPage->setUser($this);
$this->visitedPages->add($visitedPage);
return $this;
}
}
also I think you will need to add cascade={"persist"} to your private $visitedPages; inside of User object:
/**
*
* #ORM\OneToMany(targetEntity="AppBundle\Entity\VisitedPage", mappedBy="user", cascade={"persist"})
*/
private $visitedPages;

Answer 2

I fixed the issue by running this command - bin/console doctrine:cache:clear-metadata

Answer 3

You should run
php app/console cache:clear --env=prod
or
php app/console cache:clear --env=dev
depending upon env you are working