public async Task <ActionResult <QuizClass> > PutQuiz([FromBody] QuizClass quiz, Guid?id) { if (id == null) { return(BadRequest("This enpoind requires a valid QuizId")); } quiz.QuizId = id ?? Guid.Empty; var confirmedModel = new QuizClass(); //te returnen try { if (!ModelState.IsValid) { return(BadRequest(ModelState)); } if (!await quizRepo.QuizExists(id ?? Guid.Empty)) { return(BadRequest($"{id} bestaat niet")); } confirmedModel = await quizRepo.Update(quiz); } catch (DbUpdateException) { if (await quizRepo.QuizExists(id ?? Guid.Empty)) { return(Conflict()); } else { return(BadRequest("Something went wrong, try again later")); } } return(Ok(confirmedModel)); }