Argument 1 passed to Doctrine\ORM\UnitOfWork::getCollectionPersister() must be an array, null given

Question

My entities look like this (pasting just relevant parts):

User.php

    /**
     * @ManyToMany(targetEntity="Startup", inversedBy="members", cascade={"persist"})
     * @OrderBy({"name"="ASC"})
     * @var Startup[]
     */
    private $startups;

    public function __construct($data = array()) 
    {
        $this->startups = new ArrayCollection();
        $this->joined = new DateTime("now");
        parent::__construct($data);
    }

Startup.php

    /**
     * @ManyToOne(targetEntity="User", cascade={"persist"})
     * @var User
     */
    private $founder = null;

    /**
     * @ManyToMany(targetEntity="User", mappedBy="startups", cascade={"persist"})
     * @OrderBy({"lastName" = "ASC"})
     * @var User[]
     */
    private $members;

    public function __construct($data = array())
    {
        $this->files = new ArrayCollection();
        $this->topics = new ArrayCollection();
        $this->members = new ArrayCollection();

        $this->founded = new DateTime("now");

        parent::__construct($data);
    }

Now with those I am running this code ($this->identity instanceof User, $values is just some struct filled with strings, $this->model is EntityManager):

          $startup = new Startup();
          $startup->name = $values->name;
          $startup->founder = $this->identity;
          $this->model->persist($startup);
          $this->identity->startups[] = $startup;
          $this->model->flush();

And I get this:

Argument 1 passed to Doctrine\ORM\UnitOfWork::getCollectionPersister() must be an array, null given, called in .../libs/Doctrine/ORM/UnitOfWork.php on line 332 and defined

Triggered on flush obviously. What have I got wrong?

Have you tried $data = array() instead of $data = null in constructors? — smottt
Thats not issue, I got it covered, I already removed it from post to make it more clear. if($data == null) $data = array(); is before I work with $data. But it is actually good point, I dont know why I used null as default value. — Zdeněk Topič
Are you able to: 1. Provide a better stack trace (complete one, eventually with passed in parameters) 2. tell us why your model has persistence methods? — Ocramius
Call stack is in the question now. Model is just helper class to make access to repositories and EM core methods easier. — Zdeněk Topič
@ZdeněkTopič can you now please try to run schema tool validation? It's a CLI tool. Not sure if it's integrated with Nette though. — Ocramius

Zdeněk Topič Zdeněk Topič · Accepted Answer · 2013-01-07T22:44:15

1

votes

Fixed. $this->identity was problem. Framework got it serialized and then unserialized.

Argument 1 passed to Doctrine\ORM\UnitOfWork::getCollectionPersister() must be an array, null given

1 Answers