model add scope

app/models/product.rb

@@ -129,17 +129,17 @@ class Product < ActiveRecord::Base
         weight -240
 
         list do
-            admin=""
+            strs=""
             field :gross_interest_rate do
                 visible false
                 formatted_value{bindings[:view].current_admin_user.email}
-                if admin.length==0
-                    admin=formatted_value{bindings[:view].current_admin_user.email}
+                if strs.length==0
+                    strs=formatted_value{bindings[:view].current_admin_user.email}
                 end
             end
 
-            puts admin
-            if admin.length==0
+            puts strs
+            if strs.length==0
                 scopes [:inactive]
             end