Simple NamerInterface implementation

FileNamer.php

<?php

namespace Screenfony\DemoBundle\Namer;

use Vich\UploaderBundle\Naming\NamerInterface;
/**
 * Description of FileNamer
 *
 * @author ftassi
 */
class FileNamer implements NamerInterface
{
    
    public function name($obj, $field)
    {
        /* @var $image \Symfony\Component\HttpFoundation\File\UploadedFile */
        $method = 'get' . ucfirst($field);
        $image = $obj->$method();
        
        return uniqid() . '.' . $image->guessExtension();
    }
}