Potential fix for one of the issues mentioned in #49

Reduces the number of SQL queries used on group_orders/index and
group_orders/archive, but adds extra  complexity to the code

app/views/group_orders/_orders.html.haml

@@ -6,8 +6,9 @@
       %th= heading_helper Order, :ends
       %th= heading_helper GroupOrder, :price
   %tbody
-    - for order in orders
-      - group_order = order.group_order(@ordergroup) # Get GroupOrder if possible
+    - for order_hash in orders
+      - order = order_hash[:order]
+      - group_order = order_hash[:group_order]
       - order_class = group_order ? "" : "color:grey"
       %tr{:class=> cycle('even', 'odd', :name => 'orders'), :style => order_class}
         %td= group_order.present? ? link_to(order.name, group_order_path(group_order)) : order.name

app/views/group_orders/archive.html.haml

@@ -5,9 +5,9 @@
 .row-fluid
   .span6
     %h2= t '.title_open'
-    = render :partial => "orders", :locals => {:orders => Order.finished_not_closed, :pagination => false}
+    = render partial: 'orders', locals: {orders: @finished_not_closed_orders_including_group_order, pagination: false}
 
   .span6
     %h2= t '.title_closed'
     #closed_orders
-      = render :partial => "orders", :locals => {:orders => @closed_orders, :pagination => true}
+      = render partial: 'orders', locals: {orders: @closed_orders_including_group_order, pagination: true}

app/views/group_orders/archive.js.haml

@@ -1 +1 @@
-$('#closed_orders').html('#{escape_javascript(render("orders", orders: @closed_orders, pagination: true))}');
+$('#closed_orders').html('#{escape_javascript(render("orders", orders: @closed_orders_including_group_order, pagination: true))}');

app/views/group_orders/index.html.haml

@@ -21,19 +21,19 @@
 = render :partial => "shared/open_orders", :locals => {:ordergroup => @ordergroup}
 
 // finished orders
-- unless Order.finished_not_closed.empty?
+- unless @finished_not_closed_orders_including_group_order.empty?
   %section
     %h2= t '.finished_orders.title'
-    = render :partial => "orders", :locals => {:orders => Order.finished_not_closed, :pagination => false}
+    = render partial: 'orders', locals: {orders: @finished_not_closed_orders_including_group_order, pagination: false}
     - if @ordergroup.value_of_finished_orders > 0
       %p
         = t('.finished_orders.total_sum') + ':'
         %b= number_to_currency(@ordergroup.value_of_finished_orders)
 
 // closed orders
-- unless Order.closed.empty?
+- unless @closed_orders_including_group_order.empty?
   %section
     %h2= t '.closed_orders.title'
-    = render :partial => "orders", :locals => {:orders => Order.closed.limit(5), :pagination => false}
+    = render partial: 'orders', locals: {orders: @closed_orders_including_group_order, pagination: false}
     %br/
     = link_to t('.closed_orders.more'), archive_group_orders_path