From 5680e53949f92c11845f8178e3e84a35b6d99835 Mon Sep 17 00:00:00 2001
From: Deluan <deluan@navidrome.org>
Date: Sun, 26 Sep 2021 15:55:52 -0400
Subject: [PATCH] Update genres in chunks. Should fix #1368

---
 persistence/sql_genres.go | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/persistence/sql_genres.go b/persistence/sql_genres.go
index eec35abd..8af02995 100644
--- a/persistence/sql_genres.go
+++ b/persistence/sql_genres.go
@@ -22,10 +22,17 @@ func (r *sqlRepository) updateGenres(id string, tableName string, genres model.G
 		return nil
 	}
 	ins := Insert(tableName+"_genres").Columns("genre_id", tableName+"_id")
+	var genreIds []string
 	for _, g := range genres {
-		ins = ins.Values(g.ID, id)
+		genreIds = append(genreIds, g.ID)
 	}
-	_, err = r.executeSQL(ins)
+	err = utils.RangeByChunks(genreIds, 100, func(ids []string) error {
+		for _, gid := range ids {
+			ins = ins.Values(gid, id)
+		}
+		_, err = r.executeSQL(ins)
+		return err
+	})
 	return err
 }