public async Task <ActionResult <IEnumerable <MusicResource> > > GetAllMusicsByArtistId(int artistId)
{
var artist = await _artistService.GetById(artistId);
if (artist == null)
{
return(NotFound("No such an artist"));
}
var musics = await _musicService.GetByArtistId(artistId);
if (musics == null)
{
return(NotFound());
}
var musicsResource = _mapper.Map <IEnumerable <Music>, IEnumerable <MusicResource> >(musics);
return(Ok(musicsResource));
}