*/ public function prune(bool $dryRun = false): array { return DB::transaction(static function () use ($dryRun): array { $albumQuery = Album::query() ->leftJoin('songs', 'songs.album_id', '=', 'albums.id') ->whereNull('songs.album_id') ->whereNotIn('albums.id', [Album::UNKNOWN_ID]); $artistQuery = Artist::query() ->leftJoin('songs', 'songs.artist_id', '=', 'artists.id') ->leftJoin('albums', 'albums.artist_id', '=', 'artists.id') ->whereNull('songs.artist_id') ->whereNull('albums.artist_id') ->whereNotIn('artists.id', [Artist::UNKNOWN_ID, Artist::VARIOUS_ID]); $results = [ 'albums' => $albumQuery->get('albums.*'), 'artists' => $artistQuery->get('artists.*'), ]; if (!$dryRun) { $albumQuery->delete(); $artistQuery->delete(); } return $results; }); } }