diff --git a/app/models/post.rb b/app/models/post.rb
index 91d18d9f..3e838e09 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -64,14 +64,6 @@ class Post < OpenStruct
     Digest::SHA1.hexdigest id
   end
 
-  # Levanta un error si al construir el artículo no pasamos un atributo.
-  def default_attributes_missing(**args)
-    DEFAULT_ATTRIBUTES.each do |attr|
-      i18n = I18n.t("exceptions.post.#{attr}_missing")
-
-      raise ArgumentError, i18n unless args[attr].present?
-    end
-  end
 
   # Solo ejecuta la magia de OpenStruct si el campo existe en la
   # plantilla
@@ -101,12 +93,16 @@ class Post < OpenStruct
   # Detecta si es un atributo válido o no, a partir de la tabla de la
   # plantilla
   def attribute?(mid)
-    attrs = DEFAULT_ATTRIBUTES + PRIVATE_ATTRIBUTES + PUBLIC_ATTRIBUTES
-    if singleton_class.method_defined? :attributes
-      (attrs + attributes).include? attribute_name(mid)
-    else
-      attrs.include? attribute_name(mid)
+    mid = attribute_name mid
+    included = DEFAULT_ATTRIBUTES.include?(mid) ||
+               PRIVATE_ATTRIBUTES.include?(mid) ||
+               PUBLIC_ATTRIBUTES.include?(mid)
+
+    if !included && singleton_class.method_defined?(:attributes)
+      included = attributes.include? attribute_name(mid)
     end
+
+    included
   end
 
   # Devuelve los strong params para el layout
@@ -248,6 +244,15 @@ class Post < OpenStruct
 
   private
 
+  # Levanta un error si al construir el artículo no pasamos un atributo.
+  def default_attributes_missing(**args)
+    DEFAULT_ATTRIBUTES.each do |attr|
+      i18n = I18n.t("exceptions.post.#{attr}_missing")
+
+      raise ArgumentError, i18n unless args[attr].present?
+    end
+  end
+
   def document_usuaries
     document.data.fetch('usuaries', [])
   end