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-rw-r--r--synapse/storage/roommember.py68
1 files changed, 29 insertions, 39 deletions
diff --git a/synapse/storage/roommember.py b/synapse/storage/roommember.py
index 02a802bed9..027bf8c85e 100644
--- a/synapse/storage/roommember.py
+++ b/synapse/storage/roommember.py
@@ -232,6 +232,7 @@ class RoomMemberWorkerStore(EventsWorkerStore):
 
         defer.returnValue(user_who_share_room)
 
+    @defer.inlineCallbacks
     def get_joined_users_from_context(self, event, context):
         state_group = context.state_group
         if not state_group:
@@ -241,11 +242,13 @@ class RoomMemberWorkerStore(EventsWorkerStore):
             # To do this we set the state_group to a new object as object() != object()
             state_group = object()
 
-        return self._get_joined_users_from_context(
-            event.room_id, state_group, context.current_state_ids,
+        current_state_ids = yield context.get_current_state_ids(self)
+        result = yield self._get_joined_users_from_context(
+            event.room_id, state_group, current_state_ids,
             event=event,
             context=context,
         )
+        defer.returnValue(result)
 
     def get_joined_users_from_state(self, room_id, state_entry):
         state_group = state_entry.state_group
@@ -458,17 +461,29 @@ class RoomMemberWorkerStore(EventsWorkerStore):
     def _get_joined_hosts_cache(self, room_id):
         return _JoinedHostsCache(self, room_id)
 
-    @cached()
-    def who_forgot_in_room(self, room_id):
-        return self._simple_select_list(
-            table="room_memberships",
-            retcols=("user_id", "event_id"),
-            keyvalues={
-                "room_id": room_id,
-                "forgotten": 1,
-            },
-            desc="who_forgot"
-        )
+    @cachedInlineCallbacks(num_args=2)
+    def did_forget(self, user_id, room_id):
+        """Returns whether user_id has elected to discard history for room_id.
+
+        Returns False if they have since re-joined."""
+        def f(txn):
+            sql = (
+                "SELECT"
+                "  COUNT(*)"
+                " FROM"
+                "  room_memberships"
+                " WHERE"
+                "  user_id = ?"
+                " AND"
+                "  room_id = ?"
+                " AND"
+                "  forgotten = 0"
+            )
+            txn.execute(sql, (user_id, room_id))
+            rows = txn.fetchall()
+            return rows[0][0]
+        count = yield self.runInteraction("did_forget_membership", f)
+        defer.returnValue(count == 0)
 
 
 class RoomMemberStore(RoomMemberWorkerStore):
@@ -577,36 +592,11 @@ class RoomMemberStore(RoomMemberWorkerStore):
             )
             txn.execute(sql, (user_id, room_id))
 
-            txn.call_after(self.did_forget.invalidate, (user_id, room_id))
             self._invalidate_cache_and_stream(
-                txn, self.who_forgot_in_room, (room_id,)
+                txn, self.did_forget, (user_id, room_id,),
             )
         return self.runInteraction("forget_membership", f)
 
-    @cachedInlineCallbacks(num_args=2)
-    def did_forget(self, user_id, room_id):
-        """Returns whether user_id has elected to discard history for room_id.
-
-        Returns False if they have since re-joined."""
-        def f(txn):
-            sql = (
-                "SELECT"
-                "  COUNT(*)"
-                " FROM"
-                "  room_memberships"
-                " WHERE"
-                "  user_id = ?"
-                " AND"
-                "  room_id = ?"
-                " AND"
-                "  forgotten = 0"
-            )
-            txn.execute(sql, (user_id, room_id))
-            rows = txn.fetchall()
-            return rows[0][0]
-        count = yield self.runInteraction("did_forget_membership", f)
-        defer.returnValue(count == 0)
-
     @defer.inlineCallbacks
     def _background_add_membership_profile(self, progress, batch_size):
         target_min_stream_id = progress.get(