Yii上传图片 [英] Yii uploading pictures

问题描述

我是 yii 的新手，所以我关注了这个 教程.

当我尝试上传图片时，它会报告空字段，即使它不是.

我的 _form 视图:

<?php $form=$this->beginWidget('CActiveForm', array('id'='图片格式','enableAjaxValidation'=>false,'htmlOptions' =>数组('enctype' => 'multipart/form-data')，));?>...<div class="row"><?php echo $form->labelEx($model,'path_to');?><?php echo $form->fileField($model,'path_to');?><?php echo $form->error($model,'path_to');?>
...<?php $this->endWidget();?></div><!-- 形式-->

这是我的操作方法:

公共函数 actionCreate(){$model=新图片；if(isset($_POST['图片'])){$model->attributes=$_POST['图片'];$model->picture=CUploadedFile::getInstance($model,'path_to');if($model->save()){$log->lwrite('in save'.$model->picture);$model->picture->saveAs(Yii::app()->basePath.'/../images/'.$model->picture);$this->redirect(array('view','id'=>$model->id));$log->lclose();}}$this->render('create',array('model'=>$model,));}

当我 print_r($_FILES) 应该有的一切都在那里当我 print_r($_POST) 字段 'path_to' 为空时，验证器可能正在选择那个.

我可能在这里遗漏了一些东西，而且我一无所知.

更新1:我注意到 yii 使用与文件输入同名的隐藏字段，而不是从 $_POST 读取属性，这导致引擎读取空的隐藏字段.我知道当用户没有输入新图片时，隐藏字段会更新.任何人都可以建议上传图片的最佳方式是什么?

更新2:型号代码:类图片扩展了 CActiveRecord{

 public $picture;...公共函数规则(){//注意:你应该只为那些属性定义规则//将接收用户输入.返回数组(数组('path_to, page_id', 'required'),数组('page_id', 'numerical', 'integerOnly'=>true),数组('alt_text'，'安全')，//以下规则由 search() 使用.//请删除那些不应搜索的属性.数组('id, alt_text, path_to, page_id', 'safe', 'on'=>'search'),//array('path_to', 'file','types'=>'jpg, gif, png', 'allowEmpty'=>true, 'on'=>'update'),//array('path_to', 'length', 'max'=>255, 'on'=>'insert,update'),数组('path_to'，'不安全')，);}...

最好！

解决方案

我想是因为你已经在你的规则中声明了path_to"是不安全的，大量的赋值行:

$model->attributes=$_POST['图片'];

会失败，这将导致规则验证失败.更改您的规则以允许 path_to 是安全的，您应该很高兴...

看来您还需要一个 page_id，我在您的表单中没有看到.

I'm a new to yii, so I was following this tutorial.

when I try to upload picture it reports empty field even if it is not.

my _form view:

<div class="form">

<?php $form=$this->beginWidget('CActiveForm', array(
    'id'=>'picture-form',
    'enableAjaxValidation'=>false,
    'htmlOptions' => array('enctype' => 'multipart/form-data'),
     )); 
?>
...
<div class="row">
  <?php echo $form->labelEx($model,'path_to'); ?>
  <?php echo $form->fileField($model,'path_to'); ?>
  <?php echo $form->error($model,'path_to'); ?>
</div>
...
  <?php $this->endWidget(); ?>
</div><!-- form -->

and here is my action method:

public function actionCreate()
{
  $model=new Picture;
  if(isset($_POST['Picture']))
  {
    $model->attributes=$_POST['Picture'];

    $model->picture=CUploadedFile::getInstance($model,'path_to');
    if($model->save()){
      $log->lwrite('in save'.$model->picture);
      $model->picture->saveAs(Yii::app()->basePath.'/../images/'.$model->picture);
      $this->redirect(array('view','id'=>$model->id));
      $log->lclose();
    }
  }
$this->render('create',array('model'=>$model,));
}

when I print_r($_FILES) everything what should be there is there when I print_r($_POST) the field 'path_to' is empty and the validator probably is picking that one.

I'm probably missing something here and I'm clueless.

update1: I've noticed yii is using hidden field with the same name as file input, than attributes are read from $_POST, which is causing the engine reading empty hidden field. I understand that the hidden field is there for update when user is not entering new picture. Can anyone advice what is the best way of doing picture upload?

update2: model code: class Picture extends CActiveRecord {

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

Best!

解决方案

I think because you've declared 'path_to' to be unsafe in your rules, the massive assignment line:

$model->attributes=$_POST['Picture'];

Will fail, which will then cause the rule validation to fail. Change your rules to allow for path_to to be safe, and you should be good to go . . .

It also appears you're requiring a page_id, which I'm not seeing in your form.

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