STI

gistfile1.php

/**
 * Fm\DocumentBundle\Entity\Document
 *
 * @ORM\Table()
 * @ORM\Entity
 * @ORM\InheritanceType("SINGLE_TABLE")
 * @ORM\DiscriminatorColumn(name="type", type="string")
 * @ORM\DiscriminatorMap({"playerList" = "PlayerList", "playerPrice" = "PlayerPrice", "avatar" = "Avatar", "playerPhoto" = "PlayerPhoto", "teamPhoto" = "TeamPhoto"})
 * @ORM\HasLifecycleCallbacks
 */
abstract class Document
{
    const AVATAR = 'avatar';
    const PLAYER_LIST = 'playerList';
    const PLAYER_PRICE = 'playerPrice';
    const PLAYER_PHOTO = 'playerPhoto';
    const TEAM_PHOTO = 'teamPhoto';

    /**
     * @var integer $id
     *
     * @ORM\Column(name="id", type="integer")
     * @ORM\Id
     * @ORM\GeneratedValue(strategy="AUTO")
     */
    private $id;

    /**
     * @var string $name
     *
     * @Assert\NotBlank
     * @ORM\Column(name="name", type="string", length=255)
     */
    private $name;

    /**
     * @var string $path
     *
     * @ORM\Column(name="path", type="string", length=255, nullable=true)
     */
    private $path;

    /**
     * @Assert\File(maxSize="6000000")
     */
    protected $file;


    abstract public function getType();
}

/**
 * Fm\DocumentBundle\Entity\PlayerPhoto
 *
 * @ORM\Entity
 */
class PlayerPhoto extends Document
{
	/**
     * @Assert\File(
     * 	maxSize="6000000",
     * 	mimeTypes = {"image/jpeg", "image/png", "image/gif"},
     * 	mimeTypesMessage = "form.field.invalidFormat"
     * )
     */
    protected $file;

    protected function getUploadDir()
    {
        return 'uploads/playerPhotos';
    }

    public function getType()
    {
    	return 'PlayerPhoto';
    }
}

/**
 * Fm\DocumentBundle\Entity\TeamPhoto
 *
 * @ORM\Entity
 */
class TeamPhoto extends Document
{
	/**
     * @Assert\File(
     * 	maxSize="6000000",
     * 	mimeTypes = {"image/jpeg", "image/png", "image/gif"},
     * 	mimeTypesMessage = "form.field.invalidFormat"
     * )
     */
    protected $file;

    protected function getUploadDir()
    {
        return 'uploads/teamPhotos';
    }

    public function getType()
    {
    	return 'TeamPhoto';
    }
}

//controller Team
    public function setPhotoAction($id, $document_id)
    {
        $documentManager = $this->get('fm.manager.document');
        $teamManager = $this->get('fm.manager.team');

        $document = $documentManager->findDocumentById((int) $document_id);
        $team = $teamManager->findTeamById((int) $id);

        $teamManager->setPhoto($team, $document);

        ... ecc..
    }

// team manager
    /**
     * Set the team's photo.
     *
     * @param Team $team
     * @param TeamPhoto $photo
     */
    public function setPhoto(Team $team, TeamPhoto $photo)
    {
        if (null === $team) {
            throw new InvalidArgumentException('Team is null');
        }
        if (null === $photo) {
            throw new InvalidArgumentException('Photo is null');
        }
        $team->setPhoto($photo);
        $this->em->persist($team);
        $this->em->flush();
    }