Fix aggregated values (count, size, duration) in roll-up queries

persistence/album_repository.go

@@ -196,10 +196,9 @@ func (r *albumRepository) refresh(ids ...string) error {
 		group_concat(f.artist_id, ' ') as song_artist_ids, 
 		group_concat(f.album_artist_id, ' ') as album_artist_ids, 
 		group_concat(f.year, ' ') as years,
-		group_concat(mg.genre_id, ' ') as genre_ids`).
+		(select group_concat(genre_id, ' ') from media_file_genres where media_file_id = f.id) as genre_ids`).
 		From("media_file f").
 		LeftJoin("album a on f.album_id = a.id").
-		LeftJoin("media_file_genres mg on mg.media_file_id = f.id").
 		Where(Eq{"f.album_id": ids}).GroupBy("f.album_id")
 	err := r.queryAll(sel, &albums)
 	if err != nil {

persistence/artist_repository.go

@@ -197,10 +197,9 @@ func (r *artistRepository) refresh(ids ...string) error {
 		"group_concat(f.mbz_album_artist_id , ' ') as mbz_artist_id",
 		"f.sort_album_artist_name as sort_artist_name", "f.order_album_artist_name as order_artist_name",
 		"sum(f.song_count) as song_count", "sum(f.size) as size",
-		"group_concat(ag.genre_id, ' ') as genre_ids").
+		"(select group_concat(genre_id, ' ') from album_genres where album_id = f.id) as genre_ids").
 		From("album f").
 		LeftJoin("artist a on f.album_artist_id = a.id").
-		LeftJoin("album_genres ag on ag.album_id = f.id").
 		Where(Eq{"f.album_artist_id": ids}).
 		GroupBy("f.album_artist_id").OrderBy("f.id")
 	err := r.queryAll(sel, &artists)