Laravel 5干预不能写入图像数据到路径

这是我的控制器

public function store()
{ 
    $data = Request::all();
    $rules = [
                'password'   => 'required|confirmed|min:3',
                'avatar'     => 'required|image|mimes:jpeg,png,bmp',
                'email'      => 'required|email|unique:users',
                'first_name' => 'required',
                'last_name'  => 'required',
                'level'      => 'required'
            ];
    $validator = validator::make($data, $rules);
    if($validator->passes()){
        if(!file_exists(public_path("assets/uploads".date('/Y/m/d/').$data['avatar']->getClientOriginalName()))){
            $path = public_path("assets/uploads".date('/Y/m/d/').$data['avatar']->getClientOriginalName());
            Image::make($data['avatar']->getRealPath())->resize(200, 200)->save($path);
        }
    }
}

And Here is my error

无法将图像数据写入路径(/var/www/html/rnd/public/assets/uploads/2015/10/16/tes.jpg)

在uploads文件夹中没有2015文件夹，所以如果文件夹不存在，应该自动创建。

请纠正我的代码有什么问题?

感谢您的帮助。