diff --git a/app/models/post_relation.rb b/app/models/post_relation.rb
index e262893..1071234 100644
--- a/app/models/post_relation.rb
+++ b/app/models/post_relation.rb
@@ -43,9 +43,11 @@ class PostRelation < Array
       attrs.map do |attr|
         # TODO: detectar el tipo de atributo faltante y obtener el valor
         # por defecto para hacer la comparación
-        return 0 unless post.attributes.include? attr
-
-        post.public_send(attr).value
+        if post.attributes.include? attr
+          post.public_send(attr).value
+        else
+          0
+        end
       end
     end
   end