symfony2 select form with Entity Relations

Question

I'm new in symfony2 and I have to create a select form from 3 tables/objects:

**Game table:**
id,another_column
game_1, 2
game_2, 4
game_3, 10
game_4, 1

**Score table:**
id,user_id,game_id
1,4,game_1
2,4,game_3

After the user is authenticated (I'm using sof user bundle), I have to create a select form with all unplayed games. In this case my select form needs to have two options (game_2 and game_4).

ScoreFormType.php

<?php
/**
 * @package evaluation
 */
namespace GameBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class ScoreFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->add('game');
    }

    public function getName()
    {
        return 'game_score';
    }  
}

DefaultController.php

<?php

namespace AppBundle\Controller;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\EntityRepository;
use GameBundle\Entity\Score;
use GameBundle\Form\Type\ScoreFormType;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;

class DefaultController extends Controller
{
    /**
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function indexAction(Request $request)
    {    
        $m = $this->getDoctrine()->getManager();
        $parameters = [];
        if (null !== $this->getUser()) {
            $score = new Score();
            $score
                ->setUser($this->getUser())
                ->setPoints(rand(1,50))
            ;
            $form = $this->createForm(new ScoreFormType(), $score);

            $parameters['form'] = $form->createView();
        }

        return $this->render('AppBundle::index.html.twig', $parameters);
    }

}

Is there any example that can help me? I tried to do a research but nothing relevant.

Thank you.

Answer 1

You should first get your games from the database then add them to your form with:

$form = $this->createForm(new ScoreFormType(), $games);

In your ScoreFormType.php create this:

public function __construct($aYourGames = array())
{
    $this->aYourgames = $aYourGames['Your data'];
}

Now create your "select":

->add('games', 'choice', array(
            'required' => true,
            'label' => 'games',
            'choices' => $this->aYourgames
            )
        )

You can also give a class to your select it will help when you use Javascript:

'attr' => array('class' => 'govChoice'),

Answer 2

I assume the following Entities:

Game :

class Game 
{
    private $id;
    private $title;
}

Score :

class Score
{
    private $id;
    private $user_id; 

    /** 
     * @ORM\ManyToOne(targetEntity="Game")
     */
    private $game_id;
}

FormType :

<?php
/**
 * @package evaluation
 */
namespace GameBundle\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class ScoreFormType extends AbstractType
{

    private $user;

    public function __construct($user)
    {
         $this->user = $user;
    }

    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $user = $this->user;

        $builder->add('game', 'entity', array(
                        'class' => 'GameBundle:Game',
                        'property' => 'title',
                        'query_builder' => function (EntityRepository $er) use ($user) {
                               return $er->createQueryBuilder('game')
                                    ->where('game.id NOT IN(SELECT score.game_id FROM GameBundle:Score score WHERE score.user_id = :user'))
                                    ->setParameter('user', $user)
                                    ->orderBy('game.title', 'ASC');
                     ));
    }

    public function getName()
    {
        return 'game_score';
    }  
}

DefaultController :

<?php

namespace AppBundle\Controller;

use Doctrine\Common\Collections\ArrayCollection;
use Doctrine\ORM\EntityRepository;
use GameBundle\Entity\Score;
use GameBundle\Form\Type\ScoreFormType;
use Symfony\Bundle\FrameworkBundle\Controller\Controller;
use Symfony\Component\HttpFoundation\Request;

class DefaultController extends Controller
{
    /**
     * @return \Symfony\Component\HttpFoundation\Response
     */
    public function indexAction(Request $request)
    {    
        $m = $this->getDoctrine()->getManager();
        $parameters = [];
        $form = $this->createForm(new ScoreFormType($this->getUser()));

        $parameters['form'] = $form->createView();

        return $this->render('AppBundle::index.html.twig', $parameters);
    }

}

Maybe you'll need a bit fiddling around with the query in the form, but that would be one possibility to solve it with basic tools provided by the form component.