created a very ugly report

back-office/app/models/item.rb

@@ -9,19 +9,48 @@ class Item < ActiveRecord::Base
 
   validates_presence_of :name, :description, :list_price, :current_input_price, :tags, :unit_id, :code, :sub_category_id, :weight, :supplier_id
 
-
-  # todo build a front end in backoffice (rails)
   def self.items_to_order
-  	return Item.find_by_sql(%Q{
-  		select s.name as supplier, i.name as item, sum(iic.count) amount, i.current_input_price
+  	items_raw = Item.find_by_sql(%Q{
+  		select s.id as supplier_id, i.code as code, i.name as name, sum(iic.count) amount, i.current_input_price
   		from carts c
-  		join item_in_carts iic on iic.cart_id = c.id
-  		join items i on i.id = iic.item_id
-  		join suppliers s on i.supplier_id = s.id
+  		left join item_in_carts iic on iic.cart_id = c.id
+  		left join items i on i.id = iic.item_id
+  		left join suppliers s on i.supplier_id = s.id
   		where c.confirmed and not (c.packed or c.delivered)
-  		group by s.name, i.name, i.current_input_price
+  		group by s.id, i.name, i.code, i.current_input_price
   		order by s.name, amount desc;
     })
+
+    items_sorted = {}
+    suppliers_sorted = {}
+
+    items_raw.each do |item|
+      items_sorted[item.supplier_id] ||= []
+      suppliers_sorted[item.supplier_id] ||= item.supplier
+      items_sorted[item.supplier_id] << item
+    end
+
+    report_items = []
+
+    complete_sum = 0
+
+    suppliers_sorted.each_pair do |key, value|
+      rep_sec = OpenStruct.new # report section
+      rep_sec.supplier = value
+      rep_sec.items = items_sorted[key]
+      rep_sec.sum_amount = rep_sec.items.reduce(0) do |sum, item|
+        sum + (item.current_input_price * item.amount)
+      end
+      complete_sum += rep_sec.sum_amount
+
+      report_items << rep_sec
+    end
+
+    full_report = OpenStruct.new
+    full_report.sections = report_items
+    full_report.full_sum = complete_sum
+
+    return full_report
   end
 
 

back-office/app/models/item_in_cart.rb

@@ -7,6 +7,10 @@ class ItemInCart < ActiveRecord::Base
   validates :cart_id, presence: true
 
   def name
-  	item.name + " " + count.to_s + " " + price.to_s
+    if item 
+  	 item.name + " " + count.to_s + " " + price.to_s
+    else 
+      " no item "
+    end
   end
 end