我是Yii的新手，我目前正在尝试在我的本地系统中创建产品页面。我有一个位置下拉列表，从DB中获取位置。我的数据库中也有供应商表，也有相应的下拉列表。这些供应商映射到位置表。每当我从我的位置下拉选择一个位置时，必须在供应商下拉列表中自动填充该位置中的相应供应商。请说出一个解决方案。提前谢谢。
位置模型：
<?php
/**
* This is the model class for table "location".
*
* The followings are the available columns in table 'location':
* @property integer $location_id
* @property string $location_name
*/
class Location extends CActiveRecord
{
/**
* @return string the associated database table name
*/
public function tableName()
{
return 'location';
}
/**
* @return array validation rules for model attributes.
*/
public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('location_name', 'length', 'max'=>50),
// The following rule is used by search().
// @todo Please remove those attributes that should not be searched.
array('location_id, location_name', 'safe', 'on'=>'search'),
);
}
/**
* @return array relational rules.
*/
public function relations()
{
// NOTE: you may need to adjust the relation name and the related
// class name for the relations automatically generated below.
return array(
);
}
/**
* @return array customized attribute labels (name=>label)
*/
public function attributeLabels()
{
return array(
'location_id' => 'Location',
'location_name' => 'Location Name',
);
}
/**
* Retrieves a list of models based on the current search/filter conditions.
*
* Typical usecase:
* - Initialize the model fields with values from filter form.
* - Execute this method to get CActiveDataProvider instance which will filter
* models according to data in model fields.
* - Pass data provider to CGridView, CListView or any similar widget.
*
* @return CActiveDataProvider the data provider that can return the models
* based on the search/filter conditions.
*/
public function search()
{
// @todo Please modify the following code to remove attributes that should not be searched.
$criteria=new CDbCriteria;
$criteria->compare('location_id',$this->location_id);
$criteria->compare('location_name',$this->location_name,true);
return new CActiveDataProvider($this, array(
'criteria'=>$criteria,
));
}
/**
* Returns the static model of the specified AR class.
* Please note that you should have this exact method in all your CActiveRecord descendants!
* @param string $className active record class name.
* @return Location the static model class
*/
public static function model($className=__CLASS__)
{
return parent::model($className);
}
}
供应商模型：
<?php
/**
* This is the model class for table "vendor".
*
* The followings are the available columns in table 'vendor':
* @property integer $vendor_id
* @property integer $location_id
* @property string $vendor_name
*/
class Vendor extends CActiveRecord
{
/**
* @return string the associated database table name
*/
public function tableName()
{
return 'vendor';
}
/**
* @return array validation rules for model attributes.
*/
public function rules()
{
// NOTE: you should only define rules for those attributes that
// will receive user inputs.
return array(
array('location_id', 'numerical', 'integerOnly'=>true),
array('vendor_name', 'length', 'max'=>50),
// The following rule is used by search().
// @todo Please remove those attributes that should not be searched.
array('vendor_id, location_id, vendor_name', 'safe', 'on'=>'search'),
);
}
/**
* @return array relational rules.
*/
public function relations()
{
// NOTE: you may need to adjust the relation name and the related
// class name for the relations automatically generated below.
return array(
'location_id' => array(self::BELONGS_TO, 'Location','location_id'),
);
}
/**
* @return array customized attribute labels (name=>label)
*/
public function attributeLabels()
{
return array(
'vendor_id' => 'Vendor',
'location_id' => 'Location',
'vendor_name' => 'Vendor Name',
);
}
/**
* Retrieves a list of models based on the current search/filter conditions.
*
* Typical usecase:
* - Initialize the model fields with values from filter form.
* - Execute this method to get CActiveDataProvider instance which will filter
* models according to data in model fields.
* - Pass data provider to CGridView, CListView or any similar widget.
*
* @return CActiveDataProvider the data provider that can return the models
* based on the search/filter conditions.
*/
public function search()
{
// @todo Please modify the following code to remove attributes that should not be searched.
$criteria=new CDbCriteria;
$criteria->compare('vendor_id',$this->vendor_id);
$criteria->compare('location_id',$this->location_id);
$criteria->compare('vendor_name',$this->vendor_name,true);
return new CActiveDataProvider($this, array(
'criteria'=>$criteria,
));
}
/**
* Returns the static model of the specified AR class.
* Please note that you should have this exact method in all your CActiveRecord descendants!
* @param string $className active record class name.
* @return Vendor the static model class
*/
public static function model($className=__CLASS__)
{
return parent::model($className);
}
}
形式：
<?php
/* @var $this ProductsController */
/* @var $model Products */
/* @var $form CActiveForm */
?>
<div class="form">
<?php $form=$this->beginWidget('CActiveForm', array(
'id'=>'products-form',
// Please note: When you enable ajax validation, make sure the corresponding
// controller action is handling ajax validation correctly.
// There is a call to performAjaxValidation() commented in generated controller code.
// See class documentation of CActiveForm for details on this.
'enableAjaxValidation'=>true,
)); ?>
<p class="note">Fields with <span class="required">*</span> are required.</p>
<?php echo $form->errorSummary($model); ?>
<div class="row">
<?php echo $form->labelEx($model,'product_name'); ?>
<?php echo $form->textField($model,'product_name',array('size'=>50,'maxlength'=>50)); ?>
<?php echo $form->error($model,'product_name'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'description'); ?>
<?php echo $form->textArea($model,'description',array('rows'=>6, 'cols'=>50)); ?>
<?php echo $form->error($model,'description'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'quantity'); ?>
<?php echo $form->textField($model,'quantity'); ?>
<?php echo $form->error($model,'quantity'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'category_id');
echo $form->dropDownList($model,'category_id', CHtml::listData(Category::model()->findAll(), 'category_id', 'category_name'), array('prompt'=>'Select category','multiple' => 'multiple'));
?>
<?php echo $form->error($model,'category_id'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'location_id');
echo $form->dropDownList($model,'location_id', CHtml::listData(Location::model()->findAll(), 'location_id', 'location_name'), array('empty'=>'Select location'));?>
<?php echo $form->error($model,'location_id'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'vendor');
echo $form->dropDownList($model,'location_id',CHtml::listData(Vendor::model()->findAll(location_id),'location_id','vendor_name'),
array(// htmlOptions
'ajax'=>array(// special htmlOption through clientChange, for ajax
'type'=>'GET',
'url'=>$this->createUrl('Vendor/Vendordetails'),// action that will generate the data
'data'=>'js:"id="+$(this).val()',// this is the data that we are sending to the action in the controller
'dataType'=>'json',// type of data we expect back from the server
'success'=>'js:updateFields'// a javascript function that will execute when the request completes successfully
),
)
);
//echo $form->dropDownList($model,'vendor', CHtml::listData(Vendor::model()->findAll(), 'location_id', 'vendor_name'), array('empty'=>'Select vendor'));?>
<?php echo $form->error($model,'vendor'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'status'); ?>
<?php $status=array("AVAILABLE","NOT AVAILABLE")?>
<?php echo $form->radioButtonList($model,'status',$status,array('separator'=>'')); ?>
<?php echo $form->error($model,'status'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'stock'); ?>
<?php echo $form->textField($model,'stock'); ?>
<?php echo $form->error($model,'stock'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'prod_avl_date'); ?>
<?php
$this->widget('zii.widgets.jui.CJuiDatePicker',array(
'name'=>'Products[prod_avl_date]',
// additional javascript options for the date picker plugin
'options'=>array(
'showAnim'=>'fold',
'dateFormat' => 'yy/mm/dd',
),
'htmlOptions'=>array(
'style'=>'height:20px;'
),
));
?>
<?php echo $form->error($model,'prod_avl_date'); ?>
</div>
<div class="row">
<?php echo $form->labelEx($model,'prod_end_date'); ?>
<?php
$this->widget('zii.widgets.jui.CJuiDatePicker',array(
'name'=>'Products[prod_end_date]',
// additional javascript options for the date picker plugin
'options'=>array(
'showAnim'=>'fold',
'dateFormat' => 'yy/mm/dd',
),
'htmlOptions'=>array(
'style'=>'height:20px;'
),
));
?>
<?php echo $form->error($model,'prod_end_date'); ?>
</div>
<div class="row buttons">
<?php echo CHtml::submitButton($model->isNewRecord ? 'Create' : 'Save'); ?>
</div>
<?php $this->endWidget(); ?>
</div>
<!-- form -->