feeds.py: Change last_modified to SQLAlchemy

Change the last_modified check to SQLAlchemy so it works with SQLite
too.

1 files changed, 4 insertions, 3 deletions

diff --git a/feeds.py b/feeds.py
index b7b4a442..fb993624 100644
--- a/feeds.py
+++ b/feeds.py
@@ -47,9 +47,10 @@ class FasterRssFeed(Rss201rev2Feed):
 
 
 def package_last_modified(request, *args, **kwargs):
-    cursor = connection.cursor()
-    cursor.execute("SELECT MAX(last_update) FROM packages")
-    return cursor.fetchone()[0]
+    try:
+        return Package.objects.latest('last_update').last_update
+    except ObjectDoesNotExist:
+        return
 
 
 class PackageFeed(Feed):