laravel 验证错误信息到 blade模板的方法

 /**  * POST  * admin/cate  * 添加  */ public function store(Request $request) {  $input = $request->all();   $rule = [   'name' => 'required',  ];   $message = [   'name.required' => 'name not allow null'  ];    $validate = Validator::make($input, $rule, $message);   if (!$validate->passes()) {   return back()->withErrors($validate);   }  return redirect('admin/cate'); }

 $validate->errors()->add('key','error message');    return back()->withErrors($validate);

 @if(count($errors)>0)    @foreach($errors->all() as $value     {{$value}}    @endforeach @endif