created a very ugly report

back-office/app/controllers/reports_controller.rb

@@ -1,8 +1,9 @@
 class ReportsController < ApplicationController
    
    def items_to_order
-   	@items = Item.items_to_order
+   	@report = Item.items_to_order
    end
 
 
 end
+  

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

back-office/app/views/reports/items_to_order.html.erb

@@ -0,0 +1,32 @@
+<style type="text/css">
+.tg  {border-collapse:collapse;border-spacing:0;}
+.tg td{font-family:Arial, sans-serif;font-size:14px;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;}
+.tg th{font-family:Arial, sans-serif;font-size:14px;font-weight:normal;padding:10px 5px;border-style:solid;border-width:1px;overflow:hidden;word-break:normal;}
+</style>
+<div><%= "report is nil" if @report.nil? %></div>
+<table class="tg">
+  <tr>
+    <th class="tg-031e">Code</th>
+    <th class="tg-031e">Item name</th>
+    <th class="tg-031e">Amount</th>
+    <th class="tg-031e">Price</th>
+    <th class="tg-031e">Total</th>
+  </tr>
+
+  <% unless @report.nil? %>
+  <% @report.sections.each do |section| %>
+  <tr><td><%= section.supplier.name %></td></tr>
+    <% section.items.each do |item| %>
+  		<tr>	
+    		<td class="tg-031e"><%= item.code %></td>
+    		<td class="tg-031e"><%= item.name %></td>
+    		<td class="tg-031e"><%= item.amount %></td>
+    		<td class="tg-031e"><%= item.current_input_price %></td>
+    		<td class="tg-031e"><%= item.current_input_price * item.amount %></td>
+  		</tr>
+     <% end %>
+   <tr><td>Sub-total: <%= section.sum_amount %></td></tr>
+  <% end %>
+  <tr><td><strong>Total: <%= @report.full_sum %></strong> </td></tr>
+  <% end %>
+</table>