Form themeing show pictures - symfony

Question

I went to this tutorial. I got the example to work. But I don't get it because I can't customize it for my case.
I want to display a picture for each of my facebook friend and pass the adress of the profile picture from facebook to an image tag in front of the checkbox element.
Update
part of my action:
//the array is on part of my update.
$choice_test = array();
$choice_test[] = array('id' => 1, 'username' => 'test');
$choice_test[] = array('id' => 2, 'username' => 'test2');
->add('friend', 'choice', array(
'required' => true,
'expanded' => true,
'choice_list' => $choice_test, //this is my update
'choices' => $fb_friends_form, //$fb_friends_form[1]= 'First Lastane';
'multiple' => true,
'constraints' => array(new CheckChoicesFbFriends(array('fb_friends_form' => $fb_friends_form))),
'mapped' => true
))
return $this->render('FrontendChancesBundle::createrequest.html.php', array(
'form' => $form->createView()));
template:
<?php $view['form']->setTheme($form, array('FrontendDemoBundle:Form')) ;?>
<?php echo $view['form']->widget($form['friend'])?>
in FrontendDemoBundle/Ressources/views/Form/form_widget_pics.html.php:
<input
type="<?php echo isset($type) ? $view->escape($type) : 'checkbox' ?>"
<?php if (!empty($value)): ?>value="<?php echo $view->escape($value) ?>"<?php endif ?>
<?php echo $view['form']->block($form, 'checkbox_widget') ?>
/>
How can I pass even a variable, in my case the username (`$fb_username[0] = 'username' of facebook to from_widget_pics.html.php and how can I display it like this with the form bulider in my aciton:
<img src="www.facebook.com/+FirstLastname>
<input type="checkbox"
id="form_friend_0"
name="form[friend][]"
value="1"/>
<label for="form_friend_0" >First Lastname</label>
<img src="www.facebook.com/+nextfriend>

Answer 1

I had the very same exception message when trying to pass an array or collection of custom selected objects to a form using 'choice_list' option.
I solved it this way (simplified example):
Controller code:
use Symfony\Component\Form\Extension\Core\ChoiceList\SimpleChoiceList;
class UsedCarsController extends Controller {
..... action code:
$usedCars = $carRepository->findAllUsed();
$choiceList = new SimpleChoiceList($usedCars);
$form = $this->createForm(new UsedCarsType($choiceList),null, array('label' => 'Used cars form'));
... now render view, etc.
UsedCarsType:
class UsedCarsType extends AbstractType
{
private $choicesList;
public function __construct($choicesList)
{
$this->choicesList = $choicesList;
}
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('usedCars', 'choice',array('label'=>'Used cars',
'required'=>true,
'choice_list' => $this->choicesList,
'empty_value' => '-- used car --'))
;
}
Choice_list option must be an instance of SimpleChoiceList class, not an array.
A bit late but hope this helps.
BTW: I am using Symfony 2.3