is this Laravel Relationship error undefined variable $task

I am developing project management app in Laravel 5.2. in My application I have one project many tasks and one task have many file attachments. this is My file attachment view file

@foreach($task->files as $file) //line 14
                <div>
                    <div><i class="fa fa-check-square-o"></i>
                        <span>

                            <a href="" target="_blank"></a>

                   </span>
                    </div>
                </div>

and My FileController is this

use Cloudder;
use App\File as File;
use App\Task;
use App\Http\Requests;
use App\Http\Controllers\Controller;

class FilesController extends Controller
{
public function uploadAttachments(Request $request,$id,$taskId)
    {
         $this->validate($request, [
            'file_name'     => 'required|mimes:jpeg,bmp,png,pdf|between:1,7000',
        ]);

        $filename     = $request->file('file_name')->getRealPath();

        Cloudder::upload($filename, null);
        list($width, $height) = getimagesize($filename);

$fileUrl = Cloudder::show(Cloudder::getPublicId(), ["width" => $width, "height" => $height]);
        $this->saveUploads($request, $fileUrl, $id,$taskId);

and route is this

Route::post('projects/{projects}/tasks/{tasks}/', [
     'uses' => 'FilesController@uploadAttachments',
     'as'   => 'projects.files',
     'middleware' => ['auth']
]);

but got this error

ErrorException in ae0a86ab95cb7f092eb44a17fd000e94f21b305d.php line 14:
Undefined variable: task (View: C:\Users\13\Desktop\acxian\resources\views\files\form.blade.php)

how can fix this problem?

via Chebli Mohamed