Ajax request won't trigger. [Yii framework] - php

Question

I have a little problem with a Controller method AJAX call in Yii. The thing is that I'm trying to filter the data of one dropDownList based in the value of a previous selected item.
In the view file, where I figured out is the source of the problem, I have this piece of code:
<?php echo $form->labelEx($model,'Estado'); ?>
<?php echo $form->dropDownList($model,'estado',CHtml::listData(Estado::model()->findAll(),'id','nombre'),array(
'ajax'=>array(
'type'=>'POST',
'url'=>CController::createAbsoluteUrl('buscar/select'),
'update'=>'#'.CHtml::activeId($model,'tbl_municipio_id'),
),
'class'=>'form-control'
));
?>
<?php echo $form->error($model,'Estado'); ?>
On the Controller side, I got this:
public function actionSelect(){
echo "Hello world";
$data = Municipio::model()->findAll('tbl_estado_id=:tbl_estado_id',
array(':tbl_estado_id'=>(int) $_POST['Consultorio_estado']));
$data = CHtml::listData($data,'id','name');
foreach($data as $value=>$name)
{
echo CHtml::tag('option',
array('value'=>$value),CHtml::encode($name),true);
}
The ajax call to the Select method isn't triggered when the dropDownList is clicked. I tracked the request using Firebug and no error nor fail message is dropped.
Anyone knows what can I do?.
Thanks in advance.

Answer 1

With my knowledge in Yii 1.1.13, there is no such option for ajax for form->dropDownList, just Chtml::dropDownList does.
Therefore you have option to manually custom event change of form->dropDownList or add more jQuery script to handle it by yourself, or simply switch to use Chtml::dropDownList like below example
<?php
echo CHtml::dropDownList('inst_province','',
array(1=>'A',2=>'B',3=>'C', 4=>'D'),
array(
'prompt'=>'Select City',
'ajax' => array(
'type'=>'POST',
'url'=>CController::createUrl('city/selectAll'),
'update'=>'#city_area',
'data'=>array('city_param'=>'js:this.value'),
)));
?>
http://www.yiiframework.com/wiki/429/an-easy-solution-for-dependent-dropdownlist-using-ajax/