我是否需要Symfony2的$ form-> isValid（）用于搜索字段？

Question

I have created a search form on the fly in my controller to list users by nicknames / names:

$form = $this->createFormBuilder()
        ->add('username', 'search', array('required'=> false))
        ->add('name', 'search', array('required'=> false))
        ->add('submit', 'submit')
        ->getForm();

So, because this form isn't mappped in my database, I don't use any Assert.

My question : I don't know if I have to use isValid() because I don't know if this method does the same as get(‘validator’)->validate(), (then I wouldn't need it), or if it checks other interresting things.

Thanks for help, have a nice day!

Answer 1

This is recommended, you can check in the good practice advices of symfony developpers :

They recommend using $form->isSubmitted() in the if statement for clarity. This isn't technically needed, since isValid() first calls isSubmitted(). But without this, the flow doesn't read well as it looks like the form is always processed (even on the GET request).

http://symfony.com/doc/current/best_practices/forms.html