是否需要，取决于一个字段-嵌入式表格Symfony2

Question

I'm doing a Forum bundle where you can add (or not) a vote to your subject. The problem is that the embedded form (the question and the answers) has to be required only if a boolean is true.

I first tried some solutions I found here and there on the internet but nothing worked. Then I created 2 forms, one with a vote, another without and I created a little switch with some JQuery.

The problem is that when I want to create a subject and only fill one form, HTML5 tells me there are fields required I didn't fill in the other form, it doesn't only send the form I'm trying to submit, it apparently submits both.

Do you know why and how I could solve this, or maybe a simpler technique to dynamically define if a field is required or not ?

Thanks in advance !

Answer 1

I finally found a solution to my problem, so here is it:

• I add the FormType of the embedded form as required false
• I add a PRE_SUBMIT that check if the user wants to add a vote
• If not I delete the data (the question) that is sent to my controller

In fact it was the Question that created a problem because it is OneToOne associated with my subject, which means I can't add the option allow_delete (as I do for the answers).
Here was my error:

A new entity was found through the relationship '...' that was not configured to cascade persist operations for entity: ... To solve this issue: Either explicitly call EntityManager#persist() on this unknown entity or configure cascade persist this association in the mapping for example @ManyToOne(..,cascade={"persist"}). If you cannot find out which entity causes the problem implement '...' to get a clue.

For those who would like to see how i add the event here is a simple code ( highly inspired from the doc ):

In the buildForm method :

->addEventListener(FormEvents::PRE_SUBMIT, array($this, 'onPreSubmit'))    

Then you create another method :

public function onPreSubmit(FormEvent $event)
{
    $data = $event->getData();
    $form = $event->getForm();
    if($data['vote'])
    {
    }
    else
    {
        unset($data['question']);
        $event->setData($data);
    }
}