handle missing user uid. datacite/datacite#911

Martin Fenner · Martin Fenner · commit 3cc55054b3ba · 2020-01-21T08:22:28.000+01:00
diff --git a/lib/user.rb b/lib/user.rb
@@ -37,7 +37,7 @@ def is_admin_or_staff?
 
   # Helper method to check for personal account
   def is_person?
-    uid.start_with?("0")
+    uid.to_s.start_with?("0")
   end
 
   def role_name
