added new chart in home page

app/controllers/home_controller.rb

@@ -2,5 +2,7 @@ class HomeController < ApplicationController
   # GET /users
   # GET /users.json
   def index
+    @operations_per_sign = Operation.group(:sign, :year)
+    @operations = Operation.select('*, types.name types_name, min(date) min, max(date) max, sum(amount) sum_amount').where(sign: "-").joins(:type).group("types.name")
   end
 end

app/helpers/operations_helper.rb

@@ -44,4 +44,8 @@ def saved_or_default field, default
     field || default
   end
 
+  def currency_unit
+    t(:unit, scope: [:number, :currency, :format])
+  end
+
 end

app/views/home/index.html.erb

@@ -1,2 +1,21 @@
-<h1>Entrate/Uscite per Anno</h1>
-<%= column_chart Operation.group(:sign, :year).sum(:amount) %>
+<% cache [Operation.maximum(:updated_at), "home-page"] do %>
+  <div class="page-header">
+    <h1>Grafici generali</h1>
+  </div>
+  <div class="panel panel-primary">
+    <div class="panel-heading">
+      <h3 class="panel-title">Entrate/Uscite per Anno</h3>
+    </div>
+    <div class="panel-body">
+      <%= column_chart @operations_per_sign.sum(:amount) %>
+    </div>
+  </div>
+  <div class="panel panel-primary">
+    <div class="panel-heading">
+      <h3 class="panel-title">Spesa media giornaliera per tipologia</h3>
+    </div>
+    <div class="panel-body">
+      <%= column_chart @operations.map { |o| [o.types_name, (o.sum_amount/((Time.parse(o.max) - Time.parse(o.min))/86400)).round(2)] }, label: currency_unit %>
+    </div>
+  </div>
+<% end %>