Laravel在null上调用成员函数getClientOriginalExtension（）

你好我在使用laravel上传图像时出现以下错误：在null上调用成员函数getClientOriginalExtension（）。

Hello im getting the following error while upload an image using laravel: "Call to a member function getClientOriginalExtension() on null".

这是我的控制器：

$imageName = rand(11111, 99999) . '.' . $request->file('image')->getClientOriginalExtension();
            $destinationPath = 'events';
            $fileName = rand(11111, 99999) . '.' . $extension;
            $upload_success = $image->move($destinationPath, $imageName);

这是我的观点：

{!! Form::file('image', null, ['class' => 'form-control']) !!}

如何将$ imageName保存到数据库中的pic字段。我试过这个，但它不起作用。该字段在表格中保持空白。

How do i save the $imageName to the pic field in my database. I tried this but it doesn't work. The field remains empty in the table.

$task=$request->user()->tasks()->create([
            'name' => $request->name,
            'description' => $request->description,
            'location' => $request->location,
            'pic' => $imageName,
        ]);