# HG changeset patch
# User Thierry Florac <thierry.florac@onf.fr>
# Date 1535025125 -7200
# Node ID 120d60a2727983b88cc2fee565540a327ddd351c
# Parent  94f7861746a1f65b9cce3434bcd7aa38f28a630b
Return None if no visible version is available

diff -r 94f7861746a1 -r 120d60a27279 src/pyams_sequence/reference.py
--- a/src/pyams_sequence/reference.py	Thu Aug 23 13:51:32 2018 +0200
+++ b/src/pyams_sequence/reference.py	Thu Aug 23 13:52:05 2018 +0200
@@ -88,6 +88,8 @@
             visible_versions = versions.get_versions(workflow.published_states, sort=True)
             if visible_versions:
                 return visible_versions[-1]
+            else:
+                return None
         publication_info = IWorkflowPublicationInfo(content, None)
         if publication_info is not None:
             return content if publication_info.is_visible() else None