Form setter option Symfony 3 - forms

Question

I'm using Symfony 3 to build a website. I have an Entity (Users) that is in OneToOne relation with itself in order to make couples. (I didn't have others idea on how to do it easily)
The end goal is to create a form to reference the id of the other Users in the couple. So I created an IntegerType field and assign it the id but I can't set it (because there are no setId(...)). So I would know if there is a setter option (can't find in Doc/Tests), and if there isn't how could I achieve this ?
The steps to register a new couple would have been:
Send new id (of the other Users) [FORM]
Fetch the other Users ($userCouple = ...findOne...) [BDD]
If he have $couple == null then $userCouple->setCouple($this) and $this->setCouple($userCouple)
So my Users entity looks like:
<?php
namespace Acme\UserBundle\Entity;
use Doctrine\ORM\Mapping as ORM;
use FOS\UserBundle\Model\User as BaseUser;
/**
* Users
*
* #ORM\Table(name="users")
* #ORM\Entity(repositoryClass="Acme\UserBundle\Repository\UsersRepository")
*/
class Users extends BaseUser
{
/**
* #var int
*
* #ORM\Column(name="id", type="integer")
* #ORM\Id
* #ORM\GeneratedValue(strategy="AUTO")
*/
protected $id;
/**
* #ORM\OneToOne(targetEntity="Acme\UserBundle\Entity\Users")
* #ORM\JoinColumn(nullable=true)
*/
protected $couple;
/**
* Get id
*
* #return int
*/
public function getId()
{
return $this->id;
}
/**
* Set couple.
*
* #param \Acme\UserBundle\Entity\Users|null $couple
*
* #return Users
*/
public function setCouple(\Acme\UserBundle\Entity\Users $couple = null)
{
$this->couple = $couple;
return $this;
}
/**
* Get couple.
*
* #return \Acme\UserBundle\Entity\Users|null
*/
public function getCouple()
{
return $this->couple;
}
}
And my form looks like :
<?php
namespace Acme\UserBundle\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\Extension\Core\Type\IntegerType;
class ProfileFormType extends AbstractType
{
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('couple', IntegerType::class, array(
'label' => 'Couple ID',
'property_path' => 'couple.id',
'attr' => array('min' => 0),
));
}
public function getBlockPrefix()
{
return 'acme_user_profile';
}
}

Answer 1

You should solve this using a one-to-one self-referencing relation (see more here). Basically your couple would be replaced by partner which suites best the case:
...
/**
* #OneToOne(targetEntity="User")
* #JoinColumn(name="partner_id", referencedColumnName="id")
*/
protected $partner;
...
Then in the form you could use the EntityType (not sure why you wanted to use IntegerType in the first place) and do something like this:
$builder->add('users', EntityType::class, array(
// query choices from this entity
'class' => 'UserBundle:User',
// use the User.username property as the visible option string
'choice_label' => 'username',
));
Of course you can exclude the user you're editing the profile from the list of users you show as possible partners using query_builder option (passing a custom query) or choices to pass the collection of User entities you want to use (getting them first and filter out current user).