在 yii2 的非对象上调用成员函数 saveAs()

Question

我正在尝试运行 Yii2 中的应用程序我尝试上传用户个人资料图片，效果很好但是当我尝试更新名称文件时问题就开始了。它向我显示 Call to a member function saveAs() on a non-object 之类的错误。我什至尝试在没有任何更改的情况下进行更新。即使那个时候也显示相同的错误... 但如果我更改图片，就会出错。这是我的控制器

public function actionUpdate($id)
{
    $model = $this->findModel($id);

    if ($model->load(Yii::$app->request->post()) && $model->save()) {

        // get the instance of uploaded file
        $imageName = $model->user_username;
        $model->file = UploadedFile::getInstance($model,'user_avatar');

        $model->file->saveAs( '/uploads/'.$imageName.'.'.$model->file->extension );

        //save the path in DB..
        $model->user_avatar = 'uploads/'.$imageName.'.'.$model->file->extension;
        $model->save();

        return $this->redirect(['view', 'id' => $model->user_id]);
    } else {
        return $this->render('update', [
            'model' => $model,
        ]);
    }
}

模型规则

  public function rules()
            {
                return [

                [['user_email', 'user_password'], 'required'],
                    // [['user_password'], 'required'],
                    [['user_username'], 'string', 'max' => 45],
                    [['user_first_name'], 'required'],
                    [['user_app_user_id'], 'required',
                    [['user_type','user_app_name','user_status'], 'string'],
                    [['user_app_user_id'], 'integer'],
                    [['user_rememberMe'], 'boolean'],
                    [['user_first_name', 'user_last_name'], 'string', 'max' => 100],
                    [['user_email'], 'string', 'max' => 150],
                    [['user_password'], 'string', 'min'=>6],
                    [['user_password'], 'string', 'max' => 40,
                    [['user_avatar'],'file'],
                    //[['user_avatar'], 'string', 'max' => 500],
                    [['user_verification_code','user_auth_key'], 'string'],
                    [['user_email'], 'email'],
                    [['user_email'], 'filter', 'filter' => 'trim'],

                    ];
            }

Answer 1

试试这个..

$model->file = UploadedFile::getInstance($model,'user_avatar');
$ext = substr(strrchr($model->file,'.'),1);
if($ext != null)
{                
   $newfname = $model->user_username.'.'.$ext;
   $model->file->saveAs(Yii::getAlias('@webroot') .'/uploads/' .$model->user_avatar = $newfname);
}

Answer 2

您的代码需要上传文件。您应该在此处添加条件：

if ($model->file = UploadedFile::getInstance($model,'user_avatar')) {
    $model->file->saveAs( '/uploads/'.$imageName.'.'.$model->file->extension );
    //save the path in DB..
    $model->user_avatar = 'uploads/'.$imageName.'.'.$model->file->extension;
    $model->save();
}

Answer 3

我不确定这是否正确，但有时我们只需要取消设置 img 模型所需的规则：

命名空间app\models；

[['img','post_img'], 'required'],  -<<<<Delete this

删除requirede规则后，我的烦恼就消失了。希望能对某人有所帮助。

在 yii2 的非对象上调用成员函数 saveAs()

Call to a member function saveAs() on a non-object in yii2

file-upload

fatal-error

yii2