I have an admin form with a few select fields declared in my _prepareForm method like the example below:

protected function _prepareForm()
{
    $form = new Varien_Data_Form(array(
        'id' => 'datacenter_action_form',
        'action' => $this->getUrl('*/*/saveConfig'),
        'method' => 'post',
        'enctype' => 'multipart/form-data'
    ));
    $fieldset = $form->addFieldset('base_fieldset', array('legend' => 'Example');
    $fieldset->addField('entity', 'select', array(
        'name' => 'action[entity]',
        'title' => 'Entity',
        'label' => 'Entity',
        'required' => true,
        'values' => array('one','two')
    ));

    ...

    return parent::_prepareForm();
}

I was wondering if it's possible to add optgroups to the field values the same way that is possible in source models by nesting the values, something like:

...
$fieldset->addField('entity', 'select', array(
        'name' => 'action[entity]',
        'title' => 'Entity',
        'label' => 'Entity',
        'required' => true,
        'values' => array('value' => array('one','two'), 'label' => 'Numbers')
    ));
...

Where the expected output would be:

<select>
    <optgroup label="Numbers">
        <option>one</option>
        <option>two</option>
    </optgroup>
</select>

Obs.: I already tried to model the same way as in the source model (by nesting values), but it don't seemed to work

CodePudding user response：

It's possible by nesting the options like:

...
$fieldset->addField('entity', 'select', array(
        'name' => 'action[entity]',
        'title' => 'Entity',
        'label' => 'Entity',
        'required' => true,
        'values' => array(
                    array('value' => array(
                        array('value' => 'one', 'label' => 'One'),
                        array('value' => 'two', 'label' => 'Two')
                    ), 'label' => 'Numbers'))
         ));
...

I had nested it wrongly :)