Question

I need to show two dependent drop-down lists in my page. If we select an item from first drop-down list, based on the item which we selected, it should filter the entries in the second drop-down list, then I need to perform a search using the value in the second drop-down list. But the thing is that the values come from the table to show in the first drop-down list is not an active record of it. Can anyone help on this?

Currently I have that second drop-down list in place and it can perform a search based on the selected value. Now what I need to do is place a drop-down list above this and filter the items based on the first drop-down list.

Edit

1st table – client_id, client_name – items in the first drop-down list should show client names

2nd table – program_id, client_id, program_name –

3rd table – ad_id, program_id, ad_name – the second drop-down list should show ad_names filtered by using client_id.

Answer 1

Finally I did that, here is it.

In my controller,

public function actionDynamicDropdownList()
   {
    if($_POST['client_id'] > '0') {
        $result = Yii::app()->db->createCommand()->select('program_id, program_name')->from('program')->where('client_id='.$_POST['client_id'].'')->order('program_name')->queryAll();
        $this->render('admin', array(
            'result' => $result,
        ));
      }
}
public function actionDynamicProgramsList()
{
    if($_POST['program_id'] > '0') {
        $results = Yii::app()->db->createCommand()->select('ad_id, ad_name')->from('ads')->where('program_id='.$_POST['program_id'].'')->order('ad_name')->queryAll();
        $this->render('admin', array(
            'results' => $results,
        ));
    }
}

and in my view, I have added

<?php
$data = Yii::app()->db->createCommand()->select('client_id, client_name')->from('client')->order('client_name')->queryAll();
echo CHtml::dropDownList('client_id', '',CHtml::listData($data,'client_id','client_name'), array(
'empty'=>'- Select Client Name -',
'ajax'=> array(
'type'=>'POST',
'url'=>Yii::app()->baseUrl.'/index.php?r=page/dynamicDropdownList',
'update'=>'#program_id'))); 

//empty since it will be filled by the above dropdown
echo CHtml::dropDownList('program_id','', CHtml::listData($result,'program_id','program_name'), array(
'empty'=>'- Select Program Name - ',
'onchange'=>'alert(this.value);',
'ajax'=> array(
'type'=>'POST',
'url'=>Yii::app()->baseUrl.'/index.php?r=page/dynamicProgramsList',
'update'=>'#ad_id')));
    //empty since it will be filled by the above dropdown
echo CHtml::dropDownList('ad_id','', CHtml::listData($results,'ad_id','ad_name'), array(
'empty'=>'- Select Ad Name - ',

));
?>