Symfony 3形式和一对多

Question

This seems to be an easy task, but I can't figure out the best solution. I have bidirectional one-to-many relation between trainer and teams (one trainer can have many teams). When I add / edit a trainer I want to assign him team/teams. I got no error, but nothing happens. My guess is that this has something to do with the relation, owning side or something similar. There's another relation: players - team and everything works fine, but in this case I have a player form and I assign team to a player.

So if I submit a form from "many" perspective, it works, but when I try to do it from "one" persepctive, I still get null in db and relation is not being established.

Trainer.php:

/**
* @ORM\OneToMany(targetEntity="Team", mappedBy="trainer")
*/
private $teams;
...
$this->teams = new ArrayCollection();

Team.php:

/**
 * @ORM\ManyToOne(targetEntity="Trainer", inversedBy="teams")
 * @ORM\JoinColumn(name="trainer_id", referencedColumnName="id")
 */
private $trainer;

TrainerType.php:

        ->add('teams', EntityType::class, array(
            'class' => 'AppBundle:Team',
            'choice_label' => 'name',
            'multiple' => true,
            'expanded' => true,
            'label' => 'Teams',
            'query_builder' => function (EntityRepository $er) {
                return $er->createQueryBuilder('t')
                    ->where('t.isMyTeam = 1')    
                    ->orderBy('t.name', 'ASC');
            },              
        )); 

Is there a way to make it work with one to many relation? Or should I switch to many-to-many?

Answer 1

Indeed it is connected with owning side and inverse side. If you add relation as the owning side it will work but not the other way. Read this in Doctrine documentation and this about owning side .