/**
  * Display a listing of the resource.
  *
  * @return \Illuminate\Http\Response
  */
 public function index()
 {
     $promos = Promo::all();
     foreach ($promos as $promo) {
         $promo->nbStudent = count(Student::where('promo', $promo->id)->get());
     }
     return view('admin.promo.list', compact('promos'));
 }
 public function students()
 {
     $promos = Promo::all();
     //Table input
     $select_year = array();
     foreach ($promos as $promo) {
         $select_year[$promo->year] = 'Promotion ' . $promo->year;
     }
     return view('pages.students', compact('promos', 'select_year'));
 }