def delete(*, artist: ArtistModel = None, name: str = None) -> None:
assert artist or name
if not artist:
artist = ArtistModel.read(name=name)
artist.delete()
def create(*,
album: AlbumModel,
artist: ArtistModel = None,
artist_name: str = None) -> None:
assert artist or artist_name
if not artist:
artist = ArtistModel.read(name=artist_name)
artist.albums.append(album)
album.save()
def read(*, name: str) -> Union[ArtistModel, None]:
return ArtistModel.read(name=name)
