structure.rb in structure-0.28.3 vs structure.rb in structure-0.28.4

@@ -2,11 +2,21 @@
   def self.included(base)
     base.extend(ClassMethods).instance_variable_set(:@attribute_names, [])
   end
 
   def attributes
-    attribute_names.reduce({}) { |ret, name|
-      ret.update(name => self.send(name))
+    attribute_names.reduce({}) { |ret, key|
+      val = self.send(key)
+
+      ret.update(key =>
+        if val.respond_to?(:attributes)
+          val.attributes
+        elsif val.is_a?(Array)
+          val.map { |el| el.respond_to?(:attributes) ? el.attributes : el }
+        else
+          val
+        end
+      )
     }
   end
 
   def attribute_names
     self.class.attribute_names