From bb71bb3d63ded78e44d56c2cb40ee9826311e1a9 Mon Sep 17 00:00:00 2001
From: Martin Fenner <martin.fenner@datacite.org>
Date: Sun, 2 Jun 2019 08:48:39 +0200
Subject: [PATCH] handle missing fields param values

---
 app/controllers/concerns/fieldable.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/controllers/concerns/fieldable.rb b/app/controllers/concerns/fieldable.rb
index fa1839ebb..9db7fd604 100644
--- a/app/controllers/concerns/fieldable.rb
+++ b/app/controllers/concerns/fieldable.rb
@@ -6,7 +6,7 @@ def fields_from_params(params)
       fields = params.to_unsafe_h.dig(:fields)
       return nil unless fields.is_a?(Hash)
 
-      fields.each { |k, v| fields[k] = v.split(",") }
+      fields.each { |k, v| fields[k] = v.to_s.split(",") }
       fields
     end
   end