fix vacant is null

diff --git a/project/rh/admin.py b/project/rh/admin.py
index 2ddf365..a6a79a1 100644 (file)
--- a/project/rh/admin.py
+++ b/project/rh/admin.py
@@ -660,6 +660,7 @@ class PosteAdmin(DateRangeMixin, AUFMetadataAdminMixin, ProtectRegionMixin, admi
             'service__id__exact',
             'service__isnull',
             'vacant__exact',
+            'vacant__isnull',
             ):
             return True