public IActionResult AddExercise(Exercise model) { if (ModelState.IsValid) { Exercise exerciseModel = new Exercise { Name = model.Name, Sets = model.Sets, Reps = model.Reps, WeightInKg = model.WeightInKg, Day = _days.Get(model.Day.Id) }; _days.AddExercise(exerciseModel); return(RedirectToAction("Index", new { id = model.Day.Id })); } return(View(model)); }