Symfony 5 - Add select form elements in a loop in twig - php

Question

I'd like to add form elements in a twig template, but in a loop as shown there :
Example 01
Example of the code I'd need for one select element :
$form = $this->createFormBuilder()
->add('quantity', ChoiceType::class, [
'label' => false,
'choices' => [0,10,20,30]
])
->add('save', SubmitType::class,[
'label' => $this->translator->trans('Enregistrer les quantités')
]);
$form->getForm();
But I'm not that confident with dynamic forms, so first, how can I create multiform element in my controller depends on the number of line elements, pass them to my template and then display them in my twig template ?
Also, Is it possible to have ONE button to update all select elements ?
Thank you in advance.
Regards,

Answer 1

let say your lines are product, and your select is an attribute of your line( so of your product).
You could use imbrication form to solve this problem:
in your controller :
$form = $this->createForm(ProductsType::class, null, ['products'=>$allMyProductEntities);
then describe ProductsType as follow:
namespace App\Form;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
class ProductsType extends AbstractType
{
/**
* {#inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
for($product as $options['products']){
$builder->add('product', ProductType::class, [
'label' => false,
'entity' => $product,
]);
}
}
/**
* {#inheritdoc}
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Product::class
'products' => [],
));
}
}
then describe ProductType as follow:
namespace App\Form;
use Symfony\Component\Form\Extension\Core\Type\TextType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\OptionsResolver\OptionsResolver;
class ProductType extends AbstractType
{
public $translator
public function __construct(TranslatorInterface $translator){
$this->translator = $translator;
}
/**
* {#inheritdoc}
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder->add('quantity', ChoiceType::class, [
'label' => false,
'choices' => [0,10,20,30],
'default' => $option['entity']->getQuantity(),
]);
}
/**
* {#inheritdoc}
*/
public function configureOptions(OptionsResolver $resolver)
{
$resolver->setDefaults(array(
'data_class' => Product::class,
'entity' => null,
));
}
}
(Don't add submit button in your form here, do it in twig, it is best practice)
then you can loop on your form in twig:
{% for product in form.products %}
<li>
{{ form_widget(product.quantity) }}
</li>
{% endfor %}