From 6e09fb0210656725966e7f357a941f043fc2faff Mon Sep 17 00:00:00 2001
From: sentriz <senan@senan.xyz>
Date: Thu, 31 Dec 2020 00:29:55 +0000
Subject: [PATCH] clean artists with join

---
 server/scanner/scanner.go | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/server/scanner/scanner.go b/server/scanner/scanner.go
index 68c75ff..6ae0f44 100644
--- a/server/scanner/scanner.go
+++ b/server/scanner/scanner.go
@@ -135,12 +135,13 @@ func (s *Scanner) cleanFolders() (int, error) {
 
 func (s *Scanner) cleanArtists() (int, error) {
 	sub := s.db.
-		Select("1").
-		Model(&db.Album{}).
-		Where("albums.tag_artist_id=artists.id").
+		Select("artists.id").
+		Model(&db.Artist{}).
+		Joins("LEFT JOIN albums ON albums.tag_artist_id=artists.id").
+		Where("albums.id IS NULL").
 		SubQuery()
 	q := s.db.
-		Where("NOT EXISTS ?", sub).
+		Where("artists.id IN ?", sub).
 		Delete(&db.Artist{})
 	return int(q.RowsAffected), q.Error
 }