使用twig和表单构建器在symfony 3.4中生成具有变量名称的表单行

Question

Using symfony 3.4 (php)

I have a form to edit the user profile of the current user with client-dependent attributes. So I generate the form with a UserType inheriting from Symfony\Component\Form\AbstractType, adding the attributes with an EventListener depending on the client:

$form->add('ca-' . $attribute->getId(), TextType::class, array('label' => $attribute->getAttributeName() . ':'));

Now how can I generate the rows for this in my twig template? It should be something like

{{ form_row(form['ca-' . attribute.id]) }}

but it seems that I can't bind the integer attribute.id with a period. Is there a way to access this variable here? Accessing attribute address works fine with the following code:

{{ form_row(form.address) }}

Thank you

Answer 1

Try:

{{ form_row(form['ca-' ~ attribute.id]) }}

To concat string and variable in twig, just use ~