Force update in Order#finish; rescue if error raised

app/controllers/orders_controller.rb

@@ -98,6 +98,8 @@ class OrdersController < ApplicationController
     order = Order.find(params[:id])
     order.finish!(@current_user)
     redirect_to order, notice: I18n.t('orders.finish.notice')
+  rescue => error
+    redirect_to orders_url, alert: I18n.t('errors.general_msg', :msg => error.message)
   end
   
   # Renders the fax-text-file

app/models/order.rb

@@ -155,7 +155,7 @@ class Order < ActiveRecord::Base
     unless finished?
       Order.transaction do
         # set new order state (needed by notify_order_finished)
-        update_attributes(:state => 'finished', :ends => Time.now, :updated_by => user)
+        update_attributes!(:state => 'finished', :ends => Time.now, :updated_by => user)
 
         # Update order_articles. Save the current article_price to keep price consistency
         # Also save results for each group_order_result