Handle the case of asking for get_state() on an unsaved document

 - Legacy-Id: 7779

Author: OleLaursen

ietf/doc/models.py

@@ -122,6 +122,9 @@ def get_state(self, state_type=None):
         """Get state of type, or default state for document type if
         not specified. Uses a local cache to speed multiple state
         reads up."""
+        if self.pk == None: # states is many-to-many so not in database implies no state
+            return None
+
         if state_type == None:
             state_type = self.type_id