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-rw-r--r--app/helpers/jsonld_helper.rb2
1 files changed, 1 insertions, 1 deletions
diff --git a/app/helpers/jsonld_helper.rb b/app/helpers/jsonld_helper.rb
index 09446c8be..d82a07332 100644
--- a/app/helpers/jsonld_helper.rb
+++ b/app/helpers/jsonld_helper.rb
@@ -10,7 +10,7 @@ module JsonLdHelper
   end
 
   def value_or_id(value)
-    value.is_a?(String) ? value : value['id']
+    value.is_a?(String) || value.nil? ? value : value['id']
   end
 
   def supported_context?(json)