From b1eecbe47b95506c8a6d7b057e16bf36d84ef737 Mon Sep 17 00:00:00 2001
From: Martin Fenner <martin.fenner@datacite.org>
Date: Wed, 1 Jul 2020 22:05:42 +0200
Subject: [PATCH] handle nil content for subject

---
 Gemfile.lock             | 6 +++---
 lib/bolognese/utils.rb   | 2 +-
 lib/bolognese/version.rb | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/Gemfile.lock b/Gemfile.lock
index d8d760bc..9d7363b9 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -1,7 +1,7 @@
 PATH
   remote: .
   specs:
-    bolognese (1.6.10)
+    bolognese (1.6.11)
       activesupport (>= 4.2.5)
       benchmark_methods (~> 0.7)
       bibtex-ruby (>= 5.1.0)
@@ -56,7 +56,7 @@ GEM
       namae (~> 1.0)
     csl-styles (1.0.1.10)
       csl (~> 1.0)
-    diff-lcs (1.4.3)
+    diff-lcs (1.4.4)
     docile (1.3.2)
     ebnf (1.2.0)
       rdf (~> 3.1)
@@ -128,7 +128,7 @@ GEM
     rack-test (0.8.3)
       rack (>= 1.0, < 3)
     rake (12.3.3)
-    rdf (3.1.3)
+    rdf (3.1.4)
       hamster (~> 3.0)
       link_header (~> 0.0, >= 0.0.8)
     rdf-aggregate-repo (3.1.0)
diff --git a/lib/bolognese/utils.rb b/lib/bolognese/utils.rb
index da5be895..de86736b 100644
--- a/lib/bolognese/utils.rb
+++ b/lib/bolognese/utils.rb
@@ -1200,7 +1200,7 @@ def hsh_to_fos(hsh)
 
       # try to extract forId
       if hsh["subjectScheme"] == "FOR"
-        for_id = hsh["__content__"].split(" ").first || hsh["subject"].split(" ").first
+        for_id = hsh["__content__"].to_s.split(" ").first || hsh["subject"].to_s.split(" ").first
         for_id = for_id.rjust(6, "0")        
         
         subject = for_fields.find { |l| l["forId"] == for_id } ||
diff --git a/lib/bolognese/version.rb b/lib/bolognese/version.rb
index 881d1c61..6b361c1f 100644
--- a/lib/bolognese/version.rb
+++ b/lib/bolognese/version.rb
@@ -1,3 +1,3 @@
 module Bolognese
-  VERSION = "1.6.10"
+  VERSION = "1.6.11"
 end