app/models/piggybak/tax_method.rb in piggybak-0.6.25 vs app/models/piggybak/tax_method.rb in piggybak-0.6.26

@@ -8,10 +8,10 @@
 
     accepts_nested_attributes_for :tax_method_values, :allow_destroy => true
     attr_accessible :active, :tax_method_values_attributes, :description,
                     :klass
     validates_each :tax_method_values do |record, attr, value|
-      if record.klass
+      if record.klass.present?
         calculator = record.klass.constantize
         metadata_keys = value.collect { |v| v.key }.sort
         if calculator::KEYS.sort != metadata_keys
           if calculator::KEYS.empty?
             record.errors.add attr, "You don't need any metadata for this method."