fix id issues

app/controllers/dotations_controller.rb

@@ -84,7 +84,7 @@ class DotationsController < ApplicationController
 
   # Use callbacks to share common setup or constraints between actions.
   def set_dotation
-    @dotation = Dotation.find(params[:id])
+    @dotation = Dotation.friendly.find(params[:id])
   end
 
   def prepare_dependencies

app/helpers/home_helper.rb

@@ -3,6 +3,8 @@
 # helper for home
 module HomeHelper
   def change_ammount(ammount)
+    return '' if ammount.blank?
+
     ret = if ammount >= 1_000_000
             "#{ammount / 1_000_000} mln"
           else