proper i18n of last ordergroup order (thanks @JuliusR)

app/models/ordergroup.rb

@@ -26,6 +26,11 @@ class Ordergroup < Group
     User.natural_order.all.reject { |u| (users.include?(u) || u.ordergroup) }
   end
 
+  # the most recent order this ordergroup was participating in
+  def last_order
+    orders.order('orders.starts DESC').first
+  end
+
   def value_of_open_orders(exclude = nil)
     group_orders.in_open_orders.reject{|go| go == exclude}.collect(&:price).sum
   end

app/views/foodcoop/ordergroups/_ordergroups.html.haml

@@ -7,13 +7,13 @@
     %tr
       %th= heading_helper Ordergroup, :name
       %th= heading_helper Ordergroup, :user_tokens
-      %th= heading_helper Ordergroup, :last_ordered
+      %th= heading_helper Ordergroup, :last_order
 
   %tbody
     - for ordergroup in @ordergroups
       %tr
         %td= ordergroup.name
         %td=h ordergroup.users.collect { |u| show_user(u) }.join(", ")
-        %td= format_date ordergroup.orders.order('orders.starts DESC').first.try(:starts)
+        %td= format_date ordergroup.last_order.try(:starts)
         %td= link_to_new_message(message_params: {group_id: ordergroup.id})
 

config/locales/en.yml

@@ -88,6 +88,7 @@ en:
         contact_phone: Phone
         description: Description
         ignore_apple_restriction: Ignore order stop by apple points restriction
+        last_order: Last order
         name: Name
         user_tokens: Members
       page: