model add scope

app/models/product.rb

@@ -121,7 +121,7 @@ class Product < ActiveRecord::Base
         end 
             #return ((rate*100).round.to_f/100).to_s + "%"
             # user= "{current_admin_user.email}"
-        return  bindings[:view].current_admin_user.email
+        return  Rails.current_admin_user.email
     end
 
     rails_admin do