File upload (Yii) - php

Question

I'm implementing some file uploading fields and i'm having some difficulties with it.
I was following this article and everything was perfect until I tried to update my model.
If I didn't fill the file field, it was cleared after save. I was googling and find this topic. I've modified my code, but now, when I try to modify another field, it isn't save, unless I modify the image field too.
Where's the problem?
My model code:
public function actionUpdate($id)
{
$model=$this->loadModel($id);
// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);
if(isset($_POST['Company']))
{
$model->attributes=$_POST['Company'];
$the_image = CUploadedFile::getInstance($model,'image');
if (is_object($the_image) && get_class($the_image)==='CUploadedFile')
$model->image = $the_image;
if($model->save())
if (is_object($the_image))
$model->image->saveAs(Yii::getPathOfAlias('webroot') . '/upload/' . $model->image);
$this->redirect(array('view','id'=>$model->id));
}
$this->render('update',array(
'model'=>$model,
}
And these are the rules in my model:
array('name', 'required'),
array('type, number, rating, user_id', 'numerical', 'integerOnly'=>true),
array('name, image, address, site, mail', 'length', 'max'=>1000),
array('text', 'safe'),
array('image', 'file', 'types'=>'jpg, gif, png'),
array('image', 'unsafe'),
// The following rule is used by search().
// Please remove those attributes that should not be searched.
array('id, type, name, text, address, site, mail, number, rating, user_id', 'safe', 'on'=>'search'),
Please, help me. I have no clue why it isn't working.

Answer 1

Try modifying your image attribute rule on the Update scenario like this:
array('image', 'file', 'types'=>'jpg, gif, png','allowEmpty' => true, 'on'=>'update'),
I found this tip here, hope it works for you.

Answer 2

public function uploadMultifile ($model,$attr,$path)
{
if($sfile=CUploadedFile::getInstances($model, $attr)){
foreach ($sfile as $i=>$file){
$formatName=time().$i.'.'.$file->getExtensionName();
$file->saveAs(Yii::app()->basePath .DIRECTORY_SEPARATOR.'..'. $path.$formatName);
// $model->image->saveAs(Yii::app()->basePath . '/../studentimage/' . $date . $model->image);
$ffile[$i]=$formatName;
}
return ($ffile);
}
}
public function actionCreate()
{
$model=new Subject;
// $model->date_erected = date('Y-m-d');
// Uncomment the following line if AJAX validation is needed
// $this->performAjaxValidation($model);
if(isset($_POST['Subject']))
{
$model->attributes=$_POST['Subject'];
if($filez=$this->uploadMultifile($model,'imagea','/../images/views/'))
{
$model->documents=implode(",", $filez);
}
if($model->save())
$this->redirect(array('view','id'=>$model->id));
}
$this->render('create',array(
'model'=>$model,
));
}