From Json to DB B6

app.py

@@ -41,10 +41,13 @@ def get_initial_data():
         # Set default guest name for all dates
         pass
 
+def parse_date(date_str):
+    return datetime.strptime(date_str, '%y/%m/%d')
+
 def db_to_json():
     players = [p.name for p in Player.query.order_by(Player.id)]
     guest = "Guest"
-    dates = [d.date_str for d in Date.query.order_by(Date.id)]
+    dates = sorted([d.date_str for d in Date.query.all()], key=parse_date)
     attendance = {}
     for att in Attendance.query.all():
         date = Date.query.get(att.date_id).date_str