public async Task <IActionResult> SetMainPhoto(int petId, int photoId) { if (petId != int.Parse(User.FindFirst(ClaimTypes.NameIdentifier).Value)) { return(Unauthorized()); } var pet = await petsRepository.GetPet(petId); if (!pet.Photos.Any(p => p.Id == photoId)) { return(BadRequest("The photo does not belong to the user")); } var photo = await petsRepository.GetPhoto(photoId); var currentMainPhoto = await petsRepository.GetMainPhoto(petId); currentMainPhoto.MainPhoto = false; photo.MainPhoto = true; if (await petsRepository.Save()) { return(NoContent()); } return(BadRequest("Error with changing photo")); }