Добавил недостающие шаблоны, добавил related_name в моделях, добавил недостающие urls

music_storage/music/urls.py

@@ -1,8 +1,12 @@
 from django.urls import path
 
 from music.views import TrackListView
+
 from music.views import AlbumListView
+from music.views import AlbumDetailView
+
 from music.views import ArtistListView
+from music.views import ArtistDetailView
 
 
 app_name = "music"
@@ -10,5 +14,7 @@ app_name = "music"
 urlpatterns = [
     path("tracks/", TrackListView.as_view(), name="track_list"),
     path("albums/", AlbumListView.as_view(), name="album_list"),
+    path("albums/<int:pk>/", AlbumDetailView.as_view(), name="album_detail"),
     path("artists/", ArtistListView.as_view(), name="artist_list"),
+    path("artists/<int:pk>/", ArtistDetailView.as_view(), name="artist_detail"),
 ]