Fixed bug order.profit calculation.

Order.profit will also be saved, when order is closed.

db/migrate/20090317175355_add_profit_to_orders.rb

@@ -0,0 +1,13 @@
+class AddProfitToOrders < ActiveRecord::Migration
+  def self.up
+    add_column :orders, :foodcoop_result, :decimal, :precision => 8, :scale => 2
+    
+    Order.closed.each do |order|
+      order.update_attribute(:foodcoop_result, order.profit)
+    end
+  end
+
+  def self.down
+    remove_column :orders, :foodcoop_result
+  end
+end