Symfony 2 Form collection field with type file

Question

I want to upload multiple files with POST request (without Ajax). Can I use Symfony 2\'s form collection field with type file like this:

Code in Entity:

Answer 1

If you want to show multiple input fields, no, it won't work. A collection type requires you to supply some data before rendering the fields. I've already tried it, and came up creating a separate entity (e.g. File) and and adding relationship to my target entity.

example:

class File
{
    // properties

    public $file; // this holds an UploadedFile object

    // getters, setters
}

FileType:

....

public function buildForm(FormBuilderInterface $builder, array $options)
{
    $builder
        ->add('file', 'file', [
            'required' => false
        ])
    ;
}

Product:

class Product
{
    // properties

    private $images; // ManyToMany relationship

    // setters, getters
}

ProductType:

->add('images', 'collection', [
    'type' => 'YOUR_FILE_TYPE_NAME',
    'by_reference' => false,
    'required' => false
])

Product contoller:

public function someAction()
{
    ...

    $image = new File();
    $product->addImage($image);

}

I know this solution can be overkill and creates extra tables, but it works.