Symfony 2 | Form exception when modifying an object that has a file(picture) field

Question

I\'m using Symfony2. I have an entity Post that has a title and a picture field.

My problem : Everything is fine when I create a post, I have my picture e

Answer 1

Please make below change in your PostType.php.

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
    ->add('title')
    ->add('picture', 'file', array(
            'data_class' => 'Symfony\Component\HttpFoundation\File\File',
            'property_path' => 'picture'
        )
    );
}