model add scope

app/models/product.rb

@@ -1,3 +1,4 @@
+
 class Product < ActiveRecord::Base
     has_paper_trail
     self.table_name = 'products'
@@ -121,7 +122,7 @@ class Product < ActiveRecord::Base
         end 
             #return ((rate*100).round.to_f/100).to_s + "%"
             # user= "{current_admin_user.email}"
-        return  session[ :user_id ]
+        return  Session[:user_id]
     end
 
     rails_admin do