Laravel文件不存在-文件上传

我正在使用表格上传视频文件.由于某种原因，我得到的只是以下错误:

I am using a form to upload video files. For some reason all I get is the following error:

Symfony \ Component \ HttpFoundation \ File \ Exception \ FileNotFoundException
The file "" does not exist

在我的控制器中，我有一条验证规则来要求文件，就像这样

In my controller I had a validation rule to require files, like so

$validator = Validator::make(Input::all(),
  array(
    'file'  => 'required'
  )
);

但是由于上述规则，我无法正确调试正在发生的事情，因此最终将其删除，从而产生了上述错误.

But because of the above rule, I couldn't properly debug what is going on, therefore I ended up removing it, as a result to generate the above error.