app/models/piggybak/shipping_method.rb in piggybak-0.3.2 vs app/models/piggybak/shipping_method.rb in piggybak-0.4.0

@@ -7,10 +7,10 @@
     validates_presence_of :klass
 
     accepts_nested_attributes_for :shipping_method_values, :allow_destroy => true
 
     validates_each :shipping_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."