Symfony2 - adding form for oneToMany strange rendering with a "0" - forms

Question

I have a form which works fine. It persists data to two entities (News and Illustration). In fact, it will be possible, in a near future, that the user can add multiple illustrations to the news. BUT, not now :)...
So i've the backend ready for this and when I run the action which calls the formbuilder which builds the form with two FormTypes:
class NewsType extends AbstractType
{
public function buildForm( FormBuilderInterface $builder, array $options )
{
$builder
->add('date', 'date')
->add('titre', 'text')
->add('contenu', 'textarea')
->add('publication', 'checkbox', array('required' => false))
->add('illustrations', 'collection', array(
'type' => new IllustrationType(),
'allow_add' => false,
'required' => false
));
}
public function getName()
{
return 'News';
}
}
class IllustrationType extends AbstractType
{
public function buildForm( FormBuilderInterface $builder, array $options )
{
$builder
->add('file', 'file');
}
public function setDefaultOptions(OptionsResolverInterface $resolver)
{
$resolver->setDefaults(array(
'data_class' => 'Fcbg\NewsBundle\Entity\Illustration',
'cascade_validation' => true,
));
}
public function getName()
{
return 'Illustration';
}
}
The form output renders something like that:
Some idea why I have the "illustrations: 0" ? XD
Thx a lot

Answer 1

You see this because you didn't say how many Illustration you want to display (1? 2? 0? 100?). In doubt, Symfony chose to display none.
Either you allow the user to create one or several new Illustration by setting 'allow_add' => true, (what you don't want to do yet, I understood), or you manually create one (or even several) Illustration in your NewsController.php:
public function addAction()
{
$news = new News();
$Illustration = new Illustration();
$news->addIllustration($illustration);
// create your form and display it
}