Php Yii，使用CMultiFileUpload上传文件

我是Yii的新手，所以不要生气。我搞不懂CUploadFile是怎么工作的。我有我的视图文件：

<div class="form form-custom">

<?php $form=$this->beginWidget('CActiveForm', array(
    'id'=>'image-temp-form',
    'enableAjaxValidation'=>false,
    'htmlOptions'=>array('enctype'=>'multipart/form-data' ),
)); ?>

    <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,'car_type'); ?>
        <?php
        $this->widget('CMultiFileUpload', array(
            'model'=>$model,
            'attribute'=>'car_type',
            //'name' => 'files',
            'accept'=>'jpg|gif|png',
            'denied'=>'File is not allowed',
            'max'=>3,
        ));
        ?>
        <?php echo $form->error($model,'car_type'); ?>
    </div>



    <div class="row buttons">
        <?php echo CHtml::submitButton($model->isNewRecord ? 'Create' : 'Save'); ?>
    </div>

<?php $this->endWidget(); ?>

我的模型是：

公车型;

public function rules()
    {
            // NOTE: you should only define rules for those attributes that
            // will receive user inputs.
            return array(
     //   array('image', 'file','types'=>'jpg, gif, png', 'allowEmpty'=>true, 'on'=>'update'),
                    array('car_type', 'length', 'max'=>255),
                    // The following rule is used by search().
                    // @todo Please remove those attributes that should not be searched.
                    array('id, car_type', 'safe', 'on'=>'search'),
            );
    }

---

外翻顺利进行，直到我尝试上传到控制器。我在CUploadedFile:：getInstance（）中作为参数放置的所有内容；结果为空

必须为file变量指定一条规则，强制其为file类型

    array('car_type', 'file', 'types'=>'jpg, gif, png')

参考资料

---

尝试在模型规则数组中添加此行（“图像”、“汽车类型”、“类型”=>“jpg、gif、png”、“allowEmpty”=>true），

    array('car_type', 'file', 'types'=>'jpg, gif, png')