DoctrineExtensions - Tree object class: MyBundle\Entity\Category must have tree metadata at this point

Question

I want to use the tree feature of DoctrineExtensions for my Symfony2 application.

But I get this error :

Tree object class: MyBundle\Entity\Category must have tree metadata at this point.

Symfony : v2.5.3

Doctrine Common : v2.4.2

DoctrineExtensions : Master

<?php

namespace MyBundle\Entity;

use Doctrine\ORM\Mapping as ORM;
use Gedmo\Mapping\Annotation as Gedmo;

/**
 * Category
 * @Gedmo\Tree(type="nested")
 * @ORM\Table(name="category", uniqueConstraints={@ORM\UniqueConstraint(name="id", columns={"id"})})
 * use repository for handy tree functions
 * @ORM\Entity(repositoryClass="Gedmo\Tree\Entity\Repository\NestedTreeRepository")
 */
class Category
{
    /**
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="IDENTITY")
     */
    private $id;

     /**
     * @Gedmo\TreeLeft
     * @ORM\Column(name="lft", type="integer")
     */
    private $lft;

    /**
     * @Gedmo\TreeLevel
     * @ORM\Column(name="lvl", type="integer")
     */
    private $lvl;

     /**
     * @Gedmo\TreeRight
     * @ORM\Column(name="rgt", type="integer")
     */
    private $rght;

    /**
     * @Gedmo\TreeRoot
     * @ORM\Column(name="root", type="integer", nullable=true)
     */
    private $root;

     /**
     * @Gedmo\TreeParent
     * @ORM\ManyToOne(targetEntity="Category", inversedBy="children")
     * @ORM\JoinColumn(name="parentId", referencedColumnName="id", onDelete="CASCADE")
     */
    private $parentid;

    /**
     * @ORM\OneToMany(targetEntity="Category", mappedBy="parentid")
     * @ORM\OrderBy({"lft" = "ASC"})
     */
    private $children;

I followed this document to Install Gedmo Doctrine2 extensions in Symfony2, but it seems something is wrong.

Hi, did you find the solution to this question? I'm encountering similar issue. Sadly mine is not constant, it happens after some time (like 1-3 days). then we have to clear the cache (restart apache), and everything works well for some time. — PolishDeveloper, Jul 09 '15 at 12:19

score 1 · Answer 1 · answered Jan 09 '19 at 09:49

1

Maybe this will help someone. In my case I restarted the webserver and fpm and this error was gone.

answered Jan 09 '19 at 09:49

TheGhostex

21
6

I did apc cache clear and the error was gone as well – Chopchop Jan 14 '19 at 15:52

score 0 · Answer 2 · answered Feb 09 '18 at 15:41

I see that this question has been asked 3y ago, but anyways. I guess the problem is that u must initilize the doctrine tree, in CategoryRepository constructor, so u need this snippet of code in ur repo :

use NestedTreeRepositoryTrait;
$this->initializeTreeRepository($em, $class);

DoctrineExtensions - Tree object class: MyBundle\Entity\Category must have tree metadata at this point

2 Answers2