From 894932b7261f6e061e67cad6ce01170a84400426 Mon Sep 17 00:00:00 2001
From: Aart van Halteren <aart.van.halteren@philips.com>
Date: Wed, 7 Aug 2013 22:42:58 +0200
Subject: [PATCH] minor improvement (last - first)

---
 app/models/reading.rb | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/app/models/reading.rb b/app/models/reading.rb
index 6b1ec9d..d724fae 100644
--- a/app/models/reading.rb
+++ b/app/models/reading.rb
@@ -38,8 +38,6 @@ class Reading < ActiveRecord::Base
       :total_kwh_consumed_low => self.total_kwh_consumed_low - reading.total_kwh_consumed_low,
       :total_kwh_produced_high => self.total_kwh_produced_high - reading.total_kwh_produced_high,
       :total_kwh_produced_low => self.total_kwh_produced_low - reading.total_kwh_produced_low,
-      :current_kw_consumed => self.current_kw_consumed - reading.current_kw_consumed,
-      :current_kw_produced => self.current_kw_produced - reading.current_kw_produced,
       :total_m3_gas_consumed => self.total_m3_gas_consumed - reading.total_m3_gas_consumed }
   end
   
@@ -60,7 +58,7 @@ class Reading < ActiveRecord::Base
       readings_on = day(date)
       first = readings_on.first
       last = readings_on.last
-      first.diff(last)
+      last.diff(first)
     end
   end
 end