diff --git a/app/models/metadata_file.rb b/app/models/metadata_file.rb
index f27d7a9..a4cf8d1 100644
--- a/app/models/metadata_file.rb
+++ b/app/models/metadata_file.rb
@@ -80,8 +80,10 @@ class MetadataFile < MetadataTemplate
 
   # Obtiene la ruta absoluta del archivo
   #
-  # @return [String]
+  # @return [String|Nil]
   def file
+    return unless value['path']
+
     if value['path'].is_a? ActionDispatch::Http::UploadedFile
       value['path'].tempfile.path
     else