2 files changed, 20 insertions, 18 deletions
diff --git a/synapse/push/mailer.py b/synapse/push/mailer.py
index 4ccaf178ce..73580c1c6c 100644
--- a/synapse/push/mailer.py
+++ b/synapse/push/mailer.py
@@ -555,10 +555,12 @@ class Mailer(object):
             else:
                 # If the reason room doesn't have a name, say who the messages
                 # are from explicitly to avoid, "messages in the Bob room"
+                room_id = reason["room_id"]
+
                 sender_ids = list(
                     {
                         notif_events[n["event_id"]].sender
-                        for n in notifs_by_room[reason["room_id"]]
+                        for n in notifs_by_room[room_id]
                     }
                 )
 
diff --git a/synapse/storage/data_stores/main/event_push_actions.py b/synapse/storage/data_stores/main/event_push_actions.py
index 9988a6d3fc..8eed590929 100644
--- a/synapse/storage/data_stores/main/event_push_actions.py
+++ b/synapse/storage/data_stores/main/event_push_actions.py
@@ -608,6 +608,23 @@ class EventPushActionsWorkerStore(SQLBaseStore):
 
         return range_end
 
+    @defer.inlineCallbacks
+    def get_time_of_last_push_action_before(self, stream_ordering):
+        def f(txn):
+            sql = (
+                "SELECT e.received_ts"
+                " FROM event_push_actions AS ep"
+                " JOIN events e ON ep.room_id = e.room_id AND ep.event_id = e.event_id"
+                " WHERE ep.stream_ordering > ?"
+                " ORDER BY ep.stream_ordering ASC"
+                " LIMIT 1"
+            )
+            txn.execute(sql, (stream_ordering,))
+            return txn.fetchone()
+
+        result = yield self.db.runInteraction("get_time_of_last_push_action_before", f)
+        return result[0] if result else None
+
 
 class EventPushActionsStore(EventPushActionsWorkerStore):
     EPA_HIGHLIGHT_INDEX = "epa_highlight_index"
@@ -736,23 +753,6 @@ class EventPushActionsStore(EventPushActionsWorkerStore):
         return push_actions
 
     @defer.inlineCallbacks
-    def get_time_of_last_push_action_before(self, stream_ordering):
-        def f(txn):
-            sql = (
-                "SELECT e.received_ts"
-                " FROM event_push_actions AS ep"
-                " JOIN events e ON ep.room_id = e.room_id AND ep.event_id = e.event_id"
-                " WHERE ep.stream_ordering > ?"
-                " ORDER BY ep.stream_ordering ASC"
-                " LIMIT 1"
-            )
-            txn.execute(sql, (stream_ordering,))
-            return txn.fetchone()
-
-        result = yield self.db.runInteraction("get_time_of_last_push_action_before", f)
-        return result[0] if result else None
-
-    @defer.inlineCallbacks
     def get_latest_push_action_stream_ordering(self):
         def f(txn):
             txn.execute("SELECT MAX(stream_ordering) FROM event_push_actions")