How to set to checked by default a filter_checkbox choice field with symfony2.0?

Question

The title says pretty much everything, but here are pieces of my code to illustrate what I'm trying to do.

Here is the Form Type

//[...]
class ActivityFilterType extends AbstractType
{
  //[...]
  public function buildForm(FormBuilder $builder, array $options)
  {
        $builder->add('filter_checkbox', 'choice', array(
                'label'    => $this->translator->trans('form.label.sexFilter'),
                'choices'  => array(1 => ucfirst($this->translator->transChoice('sex.female', 2)), 2 => ucfirst($this->translator->transChoice('sex.male', 2))),
                'multiple' => true,
                'expanded' => true,
                'required' => false,
                'empty_value' => false,
                /*
                   // those ones didn't make it
                   'attr'     => array( 1=>array('checked' => 'checked'), 2=>array('checked' => 'checked') ),
                   'preferred_choices' => array(1, 2),
                */
        ));
  }
  //[...]
}

And the form Template

<div class="filter-message">
    <div class="select-group">
        {{ form_label(form.filter_dropdown) }}
        <div class="input control-group filter" >
            {{ form_widget(form.filter_dropdown) }}
        </div>
    </div>
    <div class="checkbox">
        {{ form_label(form.filter_checkbox) }}
        {{ form_widget(form.filter_checkbox, {'attr':{'checked':checked}}) }} 
        <!-- that didn't do it neither -->
    </div>
</div>

Thanks

Answer 1

I followed @bentidy answer in a previous post pointed here by @Squazic. It's pretty simple

So for me, as I want both sex checkbox to be checked by default, I had to add the data argument as an array (it accepts both a single value and an array).

It goes like this :

//[...]
class ActivityFilterType extends AbstractType
{
  //[...]
  public function buildForm(FormBuilder $builder, array $options)
  {
    $builder->add('filter_checkbox', 'choice', array(
            'label'    => $this->translator->trans('form.label.sexFilter'),
            'choices'  => array(1 => ucfirst($this->translator->transChoice('sex.female', 2)), 2 => ucfirst($this->translator->transChoice('sex.male', 2))),
            'multiple' => true,
            'expanded' => true,
            'required' => false,
            'empty_value' => false,
            'data' => array(1,2) // female value is 1 and male value is 2
    ));
  }
  //[...]
}

Here is the related doc : http://symfony.com/doc/2.0/reference/forms/types/field.html

Thanks Guys

Answer 2

You do this in the controller:

$activityFilter = new ActivityFilter();
$activityFilter->setFilterCheckbox(1);
$form = $this->createForm(new ActivityFilterType(), $activityFilter);
...

BTW: You shouldn't name your attribute filter_checkbox but rather make it more specific what is stored. For instance sexFilterin this case.

Answer 3

If you have a checkbox array you must set 'data' to an array of the checkboxes values that you want to make checked. Like that:

'data' =>array(0,1,2),'choices'=>array(0=>'Permitem Acesso Livre', 1=>'Exigem Cadastro', 2=>'Cobram Mensalidades ou Taxas')

That's it.