错误

出现消息“调用成员函数getClientOriginalExtension（）为null时引发”的Symfony \ Component \ Debug \ Exception \ FatalThrowableError

堆栈跟踪：

0 MYPATH \ app \ Http \ Controllers \ PostsController.php中的Symfony \ Component \ Debug \ Exception \ FatalThrowableError.php：66

控制者

public function store(Request $request)
  {
    
    $this->validate(request(),[

        'title' => 'required',

        'image' => 'image|mimes:jpeg,png,jpg,gif,svg',

        'body' => 'required',

    ]);

    $imageName = time().'.'.$request->image_file->getClientOriginalExtension();
    $request->image->move(public_path('image'), $imageName);

    auth()->user()->publish(

        new Post(request(['title','body']))
    );

    
    session()->flash('message', 'your post has now been published');

    
    return redirect('/');
}