updating query for leaderboard

resit-app/cgi-bin/components.py

@@ -59,6 +59,18 @@ def record_game(cursor, form_data):
 
 def leaderboard():
     """ The leaderboard component
+        #TODO: make it output the query results row by row
+        in a for loop - a job for a `proper' template engine?
     """
+    query = ("SELECT Player.username AS player, "
+            "(SELECT COUNT(*) FROM Game WHERE Game.player_id=Player.id) AS num_plays, "
+            "(SELECT COUNT(*) FROM Game WHERE Game.player_id=Player.id AND Game.won=1) AS num_wins "
+            "FROM Player "
+            "INNER JOIN Game ON Game.player_id=Player.id "
+            "GROUP BY username "
+            "ORDER BY num_wins/num_plays DESC")
+    # execute the query
+    cursor.execute(query, data)
+    # finish this component...
     print( utils.render_template( config['TEMPLATE_DIR'] + 'leaderboard.html') )
     return