We don't need the full events for get_rooms_for_user_where_membership_is

synapse/handlers/profile.py

@@ -16,7 +16,7 @@
 from twisted.internet import defer
 
 from synapse.api.errors import SynapseError, AuthError, CodeMessageException
-from synapse.api.constants import Membership
+from synapse.api.constants import EventTypes, Membership
 from synapse.util.logcontext import PreserveLoggingContext
 
 from ._base import BaseHandler
@@ -203,7 +203,7 @@ class ProfileHandler(BaseHandler):
 
         for j in joins:
             content = {
-                "membership": j.content["membership"],
+                "membership": Membership.JOIN,
             }
 
             yield self.distributor.fire(
@@ -212,9 +212,9 @@ class ProfileHandler(BaseHandler):
 
             msg_handler = self.hs.get_handlers().message_handler
             yield msg_handler.create_and_send_event({
-                "type": j.type,
+                "type": EventTypes.Member,
                 "room_id": j.room_id,
-                "state_key": j.state_key,
+                "state_key": user.to_string(),
                 "content": content,
-                "sender": j.state_key
+                "sender": user.to_string()
             }, ratelimit=False)

synapse/storage/roommember.py

@@ -15,6 +15,8 @@
 
 from twisted.internet import defer
 
+from collections import namedtuple
+
 from ._base import SQLBaseStore
 
 from synapse.api.constants import Membership
@@ -24,6 +26,12 @@ import logging
 logger = logging.getLogger(__name__)
 
 
+RoomsForUser = namedtuple(
+    "RoomsForUser",
+    ("room_id", "sender", "membership")
+)
+
+
 class RoomMemberStore(SQLBaseStore):
 
     def _store_room_member_txn(self, txn, event):
@@ -163,19 +171,37 @@ class RoomMemberStore(SQLBaseStore):
             membership_list (list): A list of synapse.api.constants.Membership
             values which the user must be in.
         Returns:
-            A list of RoomMemberEvent objects
+            A list of dictionary objects, with room_id, membership and sender
+            defined.
         """
         if not membership_list:
             return defer.succeed(None)
 
-        args = [user_id]
-        args.extend(membership_list)
-
         where_clause = "user_id = ? AND (%s)" % (
             " OR ".join(["membership = ?" for _ in membership_list]),
         )
 
-        return self._get_members_query(where_clause, args)
+        args = [user_id]
+        args.extend(membership_list)
+
+        def f(txn):
+            sql = (
+                "SELECT m.room_id, m.sender, m.membership"
+                " FROM room_memberships as m"
+                " INNER JOIN current_state_events as c"
+                " ON m.event_id = c.event_id"
+                " WHERE %s"
+            ) % (where_clause,)
+
+            txn.execute(sql, args)
+            return [
+                RoomsForUser(**r) for r in self.cursor_to_dict(txn)
+            ]
+
+        return self.runInteraction(
+            "get_rooms_for_user_where_membership_is",
+            f
+        )
 
     def get_joined_hosts_for_room(self, room_id):
         return self._simple_select_onecol(