public void Update(Music model)
{
if (model == null || model.Artist == null || model.Genre == null)
{
throw new ElementUpdateException <Music>(model, "Element incomplete.");
}
EntityModel.Music oldMusic = _context.Musics.Find(model.ID);
EntityModel.Artist artist = _mapper.Map <Artist, EntityModel.Artist>(model.Artist);
EntityModel.Genre genre = _mapper.Map <Genre, EntityModel.Genre>(model.Genre);
if (oldMusic == null)
{
throw new ElementUpdateException <Music>(model, "Element to update doesn't exist.");
}
oldMusic.Name = model.Name;
//oldMusic.Artist = artist;
oldMusic.ArtistID = (int)artist.ID;
//oldMusic.Genre = genre;
oldMusic.GenreID = (int)genre.ID;
try
{
_context.Musics.Update(oldMusic);
_context.SaveChanges();
}
catch (DbUpdateException ex)
{
throw new ElementUpdateException <Music>(model, "Element to update doesn't exist.", ex);
}
}
public void Update(Artist model)
{
EntityModel.Artist artist = _context.Artists.Find(model.ID);
if (artist == null)
{
throw new ElementUpdateException <Artist>(model, "Element to update doesn't exist");
}
artist.Name = model.Name;
try
{
_context.Artists.Update(artist);
_context.SaveChanges();
}
catch (DbUpdateException ex)
{
throw new ElementUpdateException <Artist>(model, "Unable to update", ex);
}
}
public void DeleteById(int id)
{
EntityModel.Artist artist = _context.Artists.Include(a => a.Musics).Where(a => a.ID.Equals(id)).FirstOrDefault();
if (artist == null)
{
throw new ElementDeleteException <Artist>(id, "Element to delete doesn't exist.");
}
if (artist.Musics.Count > 0)
{
throw new ElementDeleteException <Artist>(id, "Element to delete can't be deleted because it has at least one music associated with it.");
}
try
{
_context.Artists.Remove(artist);
_context.SaveChanges();
}
catch (DbUpdateException ex)
{
throw new ElementDeleteException <Artist>(id, "Unable to delete", ex);
}
}
