控制器中使用$this->validate验证报错

BadMethodCallException in Validator.php line 1067: Method [validateRequire] does not exist. 报出这样的错误 。控制器顶部引入如下：namespace App\Http\Controllers; use App\StudentInfo as student; use Illuminate\Http\Request; 用的是laravel5.4 还请指导一下怎么解决这个问题