I'm trying to setup something like this with Symfony 2.6.1:

$builder
    ->add('field', 'choice', [
        'choices' => array_combine(range(0.1, 1.0, 0.1), range(0.1, 1.0, 0.1))
    ]);

and this is the mapping for Doctrine:

    field:
        type: decimal
        precision: 2
        scale: 1
        options:
            default: 1.0

The field never shows the value 1.0 as selected when it is (works fine for 0.1 => 0.9). I have tried converting all float values to string using number_format but doesn't work either.

I have also tried using http://symfony.com/doc/current/reference/forms/types/choice.html#choice-list, but taking the example on that page I get this:

<select>
   <option value="0">Full</option>
   <option value="1">Half</option>
</select>

as you can see, there's no float values here (shouldn't it be 1 => Full, 0.5 => Half?) Is this a bug with ChoiceList or the example is incorrect?

Thanks in advanced for any insight.