Symfony2 : Sort / Order a translated entity form field? - forms

Question

I am trying to order an entity form field witch is translated.
I am using the symfony translation tool, so i can't order values with a SQL statement.
Is there a way to sort values after there are loaded and translated ?
Maybe using a form event ?
$builder
->add('country', 'entity',
array(
'class' => 'MyBundle:Country',
'translation_domain' => 'countries',
'property' => 'name',
'empty_value' => '---',
)
)

Answer 1

I found the solution to sort my field values in my Form Type.
We have to use the finishView() method which is called when the form view is created :
<?php
namespace My\Namespace\Form\Type;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;
use Symfony\Component\Form\FormView;
use Symfony\Component\Form\FormInterface;
use Symfony\Bundle\FrameworkBundle\Translation\Translator;
class MyFormType extends AbstractType
{
protected $translator;
public function __construct(Translator $translator)
{
$this->translator = $translator;
}
public function finishView(FormView $view, FormInterface $form, array $options)
{
// Order translated countries
$collator = new \Collator($this->translator->getLocale());
usort(
$view->children['country']->vars['choices'],
function ($a, $b) use ($collator) {
return $collator->compare(
$this->translator->trans($a->label, array(), 'countries'),
$this->translator->trans($b->label, array(), 'countries')
);
}
);
}
// ...
/**
* #param FormBuilderInterface $builder
* #param array $options
*/
public function buildForm(FormBuilderInterface $builder, array $options)
{
$builder
->add('country', 'entity',
array(
'class' => 'MyBundle:Country',
'translation_domain' => 'countries',
'property' => 'name',
'empty_value' => '---',
)
)
;
}
}
OLD ANSWER
I found a solution for my problem, I can sort them in my controller after creating the view :
$fview = $form->createView();
usort(
$fview->children['country']->vars['choices'],
function($a, $b) use ($translator){
return strcoll($translator->trans($a->label, array(), 'countries'), $translator->trans($b->label, array(), 'countries'));
}
);
Maybe I can do that in a better way ?
Originally I wished to do directly in my form builder instead of adding extra code in controllers where I use this form.

Answer 2

I think it's impossible. You need to use PHP sorting, but if you use Symfony Form Type, I would advise to sort it with JavaScript after page is loaded.

Answer 3

If your countries are in an array, just use the sort() function, with the SORT_STRING flag. You will do some gymnastic to have it in my opinion.
Check this doc : http://php.net/manual/fr/function.sort.php