idiomatic_throw_catch?.rb

  def update_main_artist
    artist = artists.first
    if rovi_artist
      artist = Artist.create(:name => rovi_artist.name)
    end
    update_attribute :main_artist_id, artist.id
  end

  def update_main_artist
    if rovi_artist
      artist = Artist.create(:name => rovi_artist.name)
    else
      artist = artists.first
    end
    update_attribute :main_artist_id, artist.id
  end

  def update_main_artist
    artist = catch(:artist) do
      if rovi_artist
        throw(:artist, Artist.create(:name => rovi_artist.name))
      end
      artists.first
    end
    update_attribute :main_artist_id, artist.id
  end