diff --git a/lib/noosfero/core_ext/active_record/reflection.rb b/lib/noosfero/core_ext/active_record/reflection.rb
index 1eb2b3c..dd9a113 100644
--- a/lib/noosfero/core_ext/active_record/reflection.rb
+++ b/lib/noosfero/core_ext/active_record/reflection.rb
@@ -1,28 +1,20 @@
+
 # on STI classes tike Article and Profile, plugins' extensions
 # on associations should be reflected on descendants
 module ActiveRecord
-  module Associations
-    def association(name) #:nodoc:
-      association = association_instance_get(name)
-
-      if association.nil?
-        reflection = self.class._reflect_on_association(name)
+  module Reflection
 
-        # Check inheritance chain for possible upstream association
-        klass = self.class.superclass
-        while reflection.nil? && klass.respond_to?(:_reflect_on_association)
-          reflection = klass._reflect_on_association(name)
-          klass = klass.superclass
-        end
+    class << self
 
-        unless reflection
-          raise AssociationNotFoundError.new(self, name)
-        end
-        association = reflection.association_class.new(self, reflection)
-        association_instance_set(name, association)
+      def add_reflection_with_descendants(ar, name, reflection)
+        self.add_reflection_without_descendants ar, name, reflection
+        ar.descendants.each do |k|
+          k._reflections.merge!(name.to_s => reflection)
+        end if ar.base_class == ar
       end
 
-      association
+      alias_method_chain :add_reflection, :descendants
+
     end
   end
 end
--
libgit2 0.21.2