Yii active dropdownlist with optgroup

Question

I try to create dropdown-list with Yii, using listData and activeDropDownList.

I use the examples found on the web, but it refuses to create the optgroups for me.

$data = CHtml::listData(MyModel::model()->getEntries(0), 'id', 'text', 'group');

Generates an array as expected:

Array([group1] => Array([10]=>FirstEntry, [20]=>SecondEntry),
 [group2]=>Array([30]=>firstEntryGroup2, [40]=>firstEntryGroup2)) 

And so on. So it's an associative array filled with sub-arrays...

But when I use

echo CHtml::activeDropDownList($model, 'dropdownName', $data);

All I get is a flat dropdown without the optgroups. Just the entries from the sub-arrays...

Yii 1.1.6 (I read something about safe-attributes and tried to implement it, but with no success...

Answer 1

One of solutions is anonymous function.

$data = CHtml::listData(
    MyModel::model()->getEntries(0),
    'id',
    'text',
    function(MyModel $aMyModelInstance){
        return $aMyModelInstance->getLocalizedGroupNameForThisInstance();
 });

Answer 2

The old answer below is incorrect. Sorry. You create optgroups using a 'group' attribute in your drop down data array.

array( array('id'=>256,'text'=>'TV','group'=>'Electrical'), array('id'=>257,'text'=>'Radio','group'=>'Electrical'), );

http://www.yiiframework.com/forum/index.php/topic/6903-how-can-i-generate-a-select-list-with-optgroup/

Old answer:

There is a great gist here that shows how do create what you're after: https://gist.github.com/StandardNerd/2909111

<?php echo CHtml::dropDownList('Cars', 'car_id', array( 'Mazda'=>array( 'mazda-rx7'=>'RX7', 'mazda-rx5'=>'RX5', ), 'Volvo'=>array( 'volvo-b9tl'=>'B9TL', 'volvo-l90e-radlader'=>'L90E Radlader', ), )); ?>

You're currently using an activeDropDownList which should only be different because you add your $model variable instead of 'Cars' and tweak the function