/**
  * @param CreateExerciseRequest $request
  * @param Lesson $lesson
  * @return JsonResponse
  */
 public function createExercise(CreateExerciseRequest $request, Lesson $lesson)
 {
     $exercise = new Exercise($request->all());
     $exercise->lesson_id = $lesson->id;
     $exercise->save();
     return $this->response($exercise);
 }
 /**
  * @param Lesson $lesson
  * @param CreateExerciseRequest $request
  * @return RedirectResponse
  */
 public function store(Lesson $lesson, CreateExerciseRequest $request) : RedirectResponse
 {
     $exercise = new Exercise($request->all());
     $exercise->lesson_id = $lesson->id;
     $exercise->save();
     return redirect('/lessons/' . $lesson->id);
 }