Hi, everyone. I followed the tutorial on dependent drop downs and just can’t seem to get the dependent selector populated with the values after selecting the value in the first selector.
What I am trying to accomplish is to select an adtype_id and then use that value to select all the ad rates that have that adtype_id from the AdRates model:
TransactionsController File
public function actionGetadrates()
{
$data = AdRates::model()->findAll('adtype_id=:parent_id',
array(':parent_id'=>(int) $_POST['Transactions']['adtype_id']));
$data = CHtml::listData($data,'id','description');
foreach($data as $id => $value)
{
echo CHtml::tag('option',array('value' => $id),CHtml::encode($value),true);
}
}
How can I troubleshoot this since it is an ajax call? Is there any way of testing to see if the action is even being executed or if the data is even being produced?
This is very frustrating. I have tried a lot of different approaches and I can’t see where my syntax is incorrect. In any case, here is the latest iteration.
Controller File
public function getPeriods($criteria)
//this function populates the first dropdown
{
if($criteria == 0)
//this means get all periods
{
$periods = Periods::model()->findAll(
array('order' => 'description'));
}
else
//only get periods that have events
{
$sql = "SELECT DISTINCT tbl_periods.id, tbl_periods.description FROM tbl_periods
INNER JOIN tbl_events ON tbl_events.period_id = tbl_periods.id
INNER JOIN tbl_donations ON tbl_donations.event_id = tbl_events.id
";
$periods = Periods::model()->findAllBySql($sql,
array('order' => 'description'));
}
$periodlist = CHtml::listData($periods,
'id', 'description');
return $periodlist;
}
public function actiongetEvents()
//this function is called through ajax to populate the dependent dropdown
{
$events = Events::model()->findAll('period_id=:selected_id',
array(':selected_id'=>(int) $_POST['period_id']));
$data = CHtml::listData($events,'id','title');
foreach($data as $value=>$name)
{
echo CHtml::tag('option',
array('value'=>$value),CHtml::encode($name),true);
}
public function actionIndex()
{
$model = new ReportForm;
if(isset($_POST['ReportForm']))
{
//some code goes here
}
$this->render('index',array('model'=>$model));
}
Here is the entire form using the CActiveForm widget
Notice that I even used activeId to identify the target dropdown ID as suggested in the dropdown tutorial because I saw that the rendered page showed the ID as ReportForm[event_id] instead of event_id. However, still nothing is happening. Can anyone spot where I am going wrong?
public function actiongetEvents()
//this function is called through ajax to populate the dependent dropdown
{
$events = Events::model()->findAll('period_id=:selected_id',
array(':selected_id'=>(int) $_POST['[b]ur model name[/b]']['period_id']));
$data = CHtml::listData($events,'id','title');
foreach($data as $value=>$name)
{
echo CHtml::tag('option',
array('value'=>$value),CHtml::encode($name),true);
}
Thanks for the link. I have gone through that thread and discovered that I had not added the # sign in the activeId statement to reference the event_id dropdown. I have now corrected that problem:
I also hard coded the selected id in the actiongetEvents function to see if that part of it was working:
public function actiongetEvents()
{
//for testing purposes hardcoding the period_id
$period_id = 1;
$events = Events::model()->findAll('period_id=:selected_id',
array(':selected_id'=> (int) $period_id));
$data = CHtml::listData($events,'id','title');
foreach($data as $value=>$name)
{
echo CHtml::tag('option',
array('value'=>$value),CHtml::encode($name),true);
}
}//end function
I then retested while checking the firebug net console and still nothing even with hardcoding the selected_id from the first dropdown. So I guess that either the function isn’t being called at all or the target dropdown isn’t being referenced correctly or perhaps both but I am still unable to figure out where exactly the problem is.
Yes, of course. I set accessRules to allow all users complete access. Then, just to be sure, I completely commented out the accessRules function as well as the filter. Still nothing.
/*
completely comment out this function
public function accessRules()
{
return array(
array('allow',
'users'=>array('*'),
),
);
}
*/
Okay, I think I am getting closer to finding out what the problem is with my dependent dropdown issue. Firebug is not detecting JS on my page. When viewing the page source, I looked in the header and did not see any JS reference to Jquery or whatever Yii uses for handling ajax requests. I know this may seem like an obvious question, but isn’t there supposed to be something in the header referencing Jquery or whatever the ajax library used by Yii? Or is it handled in some other way? Do I need to register Jquery?
After cup after cup of coffee and pulling out a few hairs, I finally figured out the solution to my dependent dropdown problem.
It was actually a syntax issue relating to the first dropdown. The prompt parameter was included in a separate comma, thus preventing the ajax call from being executed.
Here is the corrected code from the view file all working just fine:
<div class="row">
<?php echo $form->labelEx($model,'period_id'); ?>
<?php echo $form->dropdownList($model,'period_id',$this->getPeriods(1),
array(
'prompt'=>'---Select Period---',
'ajax'=>array(
'type'=>'POST', //request type
'url'=>CController::createUrl('getEvents'), //url to call.
//Style: CController::createUrl('currentController/methodToCall')
'update'=>'#' . CHtml::activeId($model, 'event_id'),
//'data'=>'js:$(this).serialize()',
//leave out the data key to pass all form values through
)));
?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'event_id'); ?>
<?php echo $form->dropdownList($model,'event_id',array(),array('prompt'=>'---Waiting for selection---')); ?>
</div>
