Adding dependant dropdown list in CActive form…
here’s code…
/_form.php*****/
<div class="form">
<?php $form=$this->beginWidget('CActiveForm', array(
'id'=>'cities-form',
'enableAjaxValidation'=>false,
)); ?>
<?php echo $form->errorSummary($model); ?>
<table style="width:600px;" >
<tr><td><?php echo $form->labelEx($model,'city_name'); ?>
</td>
<td> <?php echo $form->textField($model,'city_name',array('size'=>60,'maxlength'=>100)); ?>
<br /><?php echo $form->error($model,'city_name'); ?>
</td>
</tr>
<tr><td><?php echo $form->labelEx($model,'country_id'); ?>
</td>
<td> <?php echo $form->dropDownList($model,'country_id',CHtml::listData(Countries::model()->findAll(),'country_id','country_name'),
array(
'empty'=>'Please Select',
'ajax'=>array(
'type'=>'POST',
'url'=>CController::createUrl('Cities/dynamicstates'),
'update'=>'#'.CHtml::activeId($model,'state_id'),
)));
?>
<br /><?php echo $form->error($model,'country_id'); ?>
</td>
</tr>
<tr><td><?php echo $form->labelEx($model,'state_id'); ?>
</td>
<td> <?php echo $form->dropDownList($model,'state_id',array(),array('empty'=>'Please Select','style'=>'width:120px;')); ?>
<br /><?php echo $form->error($model,'state_id'); ?>
</td>
</tr>
<tr><td><?php echo $form->labelEx($model,'approve'); ?>
</td>
<td> <?php echo $form->checkBox($model,'approve'); ?>
<br /><?php echo $form->error($model,'approve'); ?>
</td>
</tr>
<tr><td colspan="3">
<center><?php echo CHtml::submitButton($model->isNewRecord ? 'Create' : 'Save'); ?>
</center>
</td></tr>
</table>
<?php $this->endWidget(); ?>
</div><!-- form -->
/Controller file***
CitiesController.php
*/
<?php
class CitiesController extends Controller
{
/**
* @var string the default layout for the views. Defaults to '//layouts/column2', meaning
* using two-column layout. See 'protected/views/layouts/column2.php'.
*/
public $layout='//layouts/column2';
/**
* @return array action filters
*/
public function filters()
{
return array(
'accessControl', // perform access control for CRUD operations
);
}
/**
* Specifies the access control rules.
* This method is used by the 'accessControl' filter.
* @return array access control rules
*/
public function accessRules()
{
return array(
array('allow', // allow all users to perform 'index' and 'view' actions
'actions'=>array('index','view','dynamicstates'),
'users'=>array('*'),
),
array('allow', // allow authenticated user to perform 'create' and 'update' actions
'actions'=>array('create','update'),
'users'=>array('@'),
),
array('allow', // allow admin user to perform 'admin' and 'delete' actions
'actions'=>array('admin','delete'),
'users'=>array('*'),
),
array('deny', // deny all users
'users'=>array('*'),
),
);
}
/**
* Displays a particular model.
* @param integer $id the ID of the model to be displayed
*/
public function actionView($id)
{
$this->render('view',array(
'model'=>$this->loadModel($id),
));
}
/**
* Creates a new model.
* If creation is successful, the browser will be redirected to the 'view' page.
*/
public function actionCreate()
{
$model=new Cities;
// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);
if(isset($_POST['Cities']))
{
$model->attributes=$_POST['Cities'];
$model->approve=$_POST['Cities']['approve']?'Y':'N';
if($_POST['Cities']['approve'])
{
$model->approved_by_admin_name=Yii::app()->user->getState('USER_ID');
$model->approved_by_admin_date=date('Y-m-d');
}
if($model->save())
$this->redirect(array('view','id'=>$model->city_id));
}
$this->render('create',array(
'model'=>$model,
));
}
/**
* Updates a particular model.
* If update is successful, the browser will be redirected to the 'view' page.
* @param integer $id the ID of the model to be updated
*/
public function actionUpdate($id)
{
$model=$this->loadModel($id);
// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);
if(isset($_POST['Cities']))
{
$model->attributes=$_POST['Cities'];
$model->approve=$_POST['Cities']['approve']?'Y':'N';
if($_POST['Cities']['approve'])
{
$model->approved_by_admin_name=Yii::app()->user->getState('USER_ID');
$model->approved_by_admin_date=date('Y-m-d');
}
if($model->save())
$this->redirect(array('view','id'=>$model->city_id));
}
$this->render('update',array(
'model'=>$model,
));
}
/**
* Deletes a particular model.
* If deletion is successful, the browser will be redirected to the 'index' page.
* @param integer $id the ID of the model to be deleted
*/
public function actionDelete($id)
{
if(Yii::app()->request->isPostRequest)
{
// we only allow deletion via POST request
$this->loadModel($id)->delete();
// if AJAX request (triggered by deletion via admin grid view), we should not redirect the browser
if(!isset($_GET['ajax']))
$this->redirect(isset($_POST['returnUrl']) ? $_POST['returnUrl'] : array('admin'));
}
else
throw new CHttpException(400,'Invalid request. Please do not repeat this request again.');
}
/**
* Lists all models.
*/
public function actionIndex()
{
$dataProvider=new CActiveDataProvider('Cities');
$this->render('index',array(
'dataProvider'=>$dataProvider,
));
}
/**
* Manages all models.
*/
public function actionAdmin()
{
$model=new Cities('search');
$model->unsetAttributes(); // clear any default values
if(isset($_GET['Cities']))
$model->attributes=$_GET['Cities'];
$this->render('admin',array(
'model'=>$model,
));
}
/**
* Returns the data model based on the primary key given in the GET variable.
* If the data model is not found, an HTTP exception will be raised.
* @param integer the ID of the model to be loaded
*/
public function loadModel($id)
{
$model=Cities::model()->findByPk((int)$id);
if($model===null)
throw new CHttpException(404,'The requested page does not exist.');
return $model;
}
/**
* Performs the AJAX validation.
* @param CModel the model to be validated
*/
protected function performAjaxValidation($model)
{
if(isset($_POST['ajax']) && $_POST['ajax']==='cities-form')
{
echo CActiveForm::validate($model);
Yii::app()->end();
}
}
public function actiondynamicstates()
{
$data=States::model()->findAllBySql('select state_id,state_name from states where country_id='.$_POST['Cities']['country_id']);
$data=CHtml::listData($data,'state_id','state_name');
foreach($data as $value=>$name)
{
echo CHtml::tag('option',array('value'=>$value),CHtml::encode($name),true);
}
}
}
Explaination–
there are tables named cities,states and countries–
when you select coutry list of states is filled into second dependant dropdown box
i.e states dropdownbox…
