Defer on non-existent peer databag

canonical · Aug 7, 2023 · 385f642 · 385f642
1 parent ba5cbf6
commit 385f642
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/src/relations/db.py b/src/relations/db.py
@@ -224,7 +224,11 @@ def _on_relation_joined(self, join_event: RelationJoinedEvent):
             f"DEPRECATION WARNING - {self.relation_name} is a legacy relation, and will be deprecated in a future release. "
         )
 
-        remote_app_databag = join_event.relation.data[join_event.app]
+        remote_app_databag = join_event.relation.data.get(join_event.app)
+        if remote_app_databag is None:
+            logger.warning("Defer relation joined: No remote app databag")
+            join_event.defer()
+            return
 
         if self._block_on_extensions(join_event.relation, remote_app_databag):
             return