Customizing Xmultiselect in Yii - yii-extensions

Question

I am not able to make the left list of multiselect widget in empty mode on load. It shows error when I set null value to the left list. This is my code:
$this->widget('ext.widgets.multiselects.XMultiSelects', array(
'leftTitle' => '',
'leftName' => 'Certificate[selected][]',
'leftList' => SpecificCertification::model()->findCertificate(),// here I need to make the list empty
'rightTitle' => '',
'rightName' => 'Certificate[all][]',
'rightList' => SpecificCertification::model()->findCertificates(),
'size' => 10,
));
How can I make the left list empty ?

Answer 1

You need to open file widget XMultiSelects.php and modify it to fit your need
public function init()
{
/* Comment out the below validation
if(!isset($this->leftList))
{
throw new CHttpException(500,'"leftList" have to be set!');
}
if(!isset($this->rightList))
{
throw new CHttpException(500,'"rightList" have to be set!');
}
*/
}
Add validation for leftList and rightList such as below
if($this->leftList){
foreach($this->leftList as $value=>$label)
{
echo "<option value=\"{$value}\">{$label}</option>\n";
}
}
and
if($this->rightList){
foreach($this->rightList as $value=>$label)
{
echo "<option value=\"{$value}\">{$label}</option>\n";
}
}
After then, you can set null for them like what you did