Yii. Dependent Dropdown - php

Question

I try make dependent select.
My Model
Region
id
region
City
id
city
region_id
Customer
id
region
city
address
phone
In my views(Customer form):
<div class="row">
<?php
echo $form->dropDownList($model,'region',CHtml::listData(Region::model()->findAll(), 'id', 'region'),
array(
'prompt'=>'Select Region',
'ajax' => array(
'type' => 'POST', //My method type
'url' => CController::createUrl('myController/LoadRegions'), //This is my request/ajax URL
array('id'=>'js:this.value'), //I'm passing the selected dropdonw value.
'dataType' => 'JSON',
'success'=>'js:function(data)' //The functionaliy after success
. '{'
. ' var html="";'
. ' $.each(data,function(i,obj)'
. ' {'
. ' html+="<option value=obj.City_id>"+obj.City_city+"</option>"'
. ' });'
. ' $("#User_City_id").html(html);' //ID of regions dropdown list
. '}'
)));
echo CHtml::dropDownList($model,'City_id', array(), array('prompt'=>'Select City'));
?>
And in my controller(Customer):
public function actionLoadRegions()
{
$Region_id=$_POST['region'];
$criteria=new CDbCriteria();
$criteria->select=array('Region_id, Region_region');
$criteria->condition='Region_id='.$Region_id;
$criteria->order='Region_region';
$RegionAry= Region::model()->findAll($criteria);
$ary=array();
foreach($RegionAry as $i=>$obj)
{
$ary[$i]['Region_id']=$obj->Region_id;
$ary[$i]['Region_region']=$obj->Region_region;
}
echo json_encode($ary);
}
But code is not work. Error Object of class Customer could not be converted to string. Why?

Answer 1

This will work
Your Form
'success' => 'js:function(data) {
$("#User_City_id").html(data);
}'
Your Controller function
public function actionLoadRegions()
{
$Region_id=$_POST['region'];
$criteria=new CDbCriteria();
$criteria->select=array('Region_id, Region_region');
$criteria->condition='Region_id='.$Region_id;
$criteria->order='Region_region';
$RegionAry= Region::model()->findAll($criteria);
$ary=array();
foreach($RegionAry as $i=>$obj)
{
$ary[$i]['Region_id']=$obj->Region_id;
$ary[$i]['Region_region']=$obj->Region_region;
}
echo CHtml::dropDownList('dropdown_name', $selected, $ary);
}

Answer 2

I am not familier with Yii but I think you are treating a integer variable as a string so that its showing error .
You sure about this-
echo CHtml::dropDownList($model,'City_id', array(), array('prompt'=>'Select City'));
try instead
echo CHtml::dropDownList($model,City_id, array(), array('prompt'=>'Select City'));

Answer 3

use something like this:
echo $form->dropDownList(
$model,
'state_id',
$array,
array(
'class' => 'form-control',
'ajax' => array(
'type' => 'POST',
'url' => $this->createUrl('getregions'),
'update' => '#Customers_region_id',
'data'=>array('state_id'=>'js:this.value')
)
)
); ?>
but you have to change name of field state_id, update and url on your defining of dropDownList.
maybe it will help.