No need to use table name in by_star_field, as ActiveRecord will put …

…this in automatically if it's needed

lib/by_star.rb

@@ -14,7 +14,7 @@ module ByStar
 
   def by_star_field(field=nil)
     @by_star_field ||= field
-    @by_star_field || "#{self.table_name}.created_at"
+    @by_star_field || "created_at"
   end
 
   include ByDirection