Merge pull request 'master' (#318) from master into Docker

Reviewed-on: SGD-Nord/konova#318

intervention/models/intervention.py

@@ -325,7 +325,8 @@ class Intervention(BaseObject,
             is_ready (bool) : True|False
         """
         now_date = timezone.now().date()
-        binding_date = self.legal.binding_date
+        # use current date as fallback if binding_date does not exist --> is_old_entry will fail as we want it for this case
+        binding_date = self.legal.binding_date or timezone.now().date()
         is_old_entry = binding_date < LKOMPVZVO_PUBLISH_DATE
         is_binding_date_ready = binding_date is not None and binding_date <= now_date
         is_recorded = self.recorded is not None