[gnome-music: 2/4] query: Sort album tracks by their album disc number

[Arnel A. Borja <arnelborja src gnome org>]

commit 8373ebcc69502ec3bac257cf8d425d2fad2a4d32
Author: Arnel A. Borja <arnelborja src gnome org>
Date:   Sun Aug 18 20:04:52 2013 +0800

    query: Sort album tracks by their album disc number
    
    https://bugzilla.gnome.org/show_bug.cgi?id=705038

 gnomemusic/query.py |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/gnomemusic/query.py b/gnomemusic/query.py
index 24bf212..2949ed9 100644
--- a/gnomemusic/query.py
+++ b/gnomemusic/query.py
@@ -212,7 +212,10 @@ class Query():
             tracker:id(?album) = %(album_id)s
         )
     }
-    ORDER BY nmm:trackNumber(?song) tracker:added(?song)
+    ORDER BY
+         nmm:setNumber(nmm:musicAlbumDisc(?song))
+         nmm:trackNumber(?song)
+         tracker:added(?song)
     '''.replace('\n', ' ').strip() % {'album_id': album_id}
 
         return query