Question

I have some *Type form classes and a forms.html.twig to customize form appearance. By default, in this file the labels are rendered with this block:

<label{% for attrname,attrvalue in attr %} {{attrname}}="{{attrvalue}}"{% endfor %}>{{ label|trans }}</label>

I’d like to add a prefix to the label ir order to organize my translations. For example let’s say I have a CustomerType, then I’d like my labels to be like:

<label{% for attrname,attrvalue in attr %} {{attrname}}="{{attrvalue}}"{% endfor %}>
  {{ 'Customer.' ~ label|trans }}
</label>

I want to be able to pass that 'Customer' string to the FormBuilder in such a way that I am able to use it like:

<label{% for attrname,attrvalue in attr %} {{attrname}}="{{attrvalue}}"{% endfor %}>
  {{ prefix ~ '.' ~ label|trans }}
</label>

or maybe:

<label{% for attrname,attrvalue in attr %} {{attrname}}="{{attrvalue}}"{% endfor %}>
  {{ form.prefix ~ '.' ~ label|trans }
}</label>

Does someone know how to achieve this?

Answer 1

With Symfony 2.1

<?php
namespace MyProject\MyBundle\Form\Extension;

use Symfony\Component\Form\AbstractTypeExtension;
use Symfony\Component\Form\FormBuilder;
use Symfony\Component\Form\FormView;
use Symfony\Component\Form\FormInterface;

class FieldTypeExtendedExtension extends AbstractTypeExtension
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder->setAttribute('label_prefix', $options['label_prefix']);
    }

    public function buildView(FormViewInterface $view, FormInterface $form, array $options)
    {
        $labelPrefix = $form->getRoot()->hasAttribute('label_prefix') ? $form->getRoot()->getAttribute('label_prefix') : '';
        $view->setVar('label', $labelPrefix.$view->getVar('label'));
    }

    public function setDefaultOptions(OptionsResolverInterface $resolver)
    {
        $resolver->setDefaults(array(
            'label_prefix' => ''
        ));
    }

    public function getExtendedType()
    {
        return 'form';
    }
}

Declare this extension as a service

<service id="form.type_extension.fieldextended" class="MyProject\MyBundle\Form\Extension\FieldTypeExtendedExtension">
    <tag name="form.type_extension" alias="form" />
</service>

For more informations, see the documentation.