no ejecutar validaciones al guardar un archivo

app/models/metadata_file.rb

@@ -47,13 +47,13 @@ class MetadataFile < MetadataTemplate
   # repetida.
   def save
     value['description'] = sanitize value['description']
-    value['path'] = nil unless path?
 
-    return true if path_optional?
-    return false unless hardlink
-
-    # Modificar el valor actual
-    value['path'] = relative_destination_path
+    if path?
+      hardlink
+      value['path'] = relative_destination_path
+    else
+      value['path'] = nil
+    end
 
     true
   end
@@ -107,6 +107,8 @@ class MetadataFile < MetadataTemplate
   end
 
   def file
+    return unless path?
+
     @file ||=
       case value['path']
       when ActionDispatch::Http::UploadedFile then value['path'].tempfile.path