Batch fetch bundled references (#14508)

Avoid an n+1 query problem and fetch the bundled aggregations for
m.reference relations in a single query instead of a query per event.

This applies similar logic for as was previously done for edits in
8b309adb436c162510ed1402f33b8741d71fc058 (#11660; threads
in b65acead428653b988351ae8d7b22127a22039cd (#11752); and
annotations in 1799a54a545618782840a60950ef4b64da9ee24d (#14491).

1 files changed, 2 insertions, 2 deletions

diff --git a/tests/rest/client/test_relations.py b/tests/rest/client/test_relations.py

index 2d2b683548..b86f341ff5 100644
--- a/tests/rest/client/test_relations.py
+++ b/tests/rest/client/test_relations.py
@@ -1108,7 +1108,7 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
 
         # The "user" sent the root event and is making queries for the bundled
         # aggregations: they have participated.
-        self._test_bundled_aggregations(RelationTypes.THREAD, _gen_assert(True), 8)
+        self._test_bundled_aggregations(RelationTypes.THREAD, _gen_assert(True), 7)
         # The "user2" sent replies in the thread and is making queries for the
         # bundled aggregations: they have participated.
         #
@@ -1170,7 +1170,7 @@ class BundledAggregationsTestCase(BaseRelationsTestCase):
                 bundled_aggregations["latest_event"].get("unsigned"),
             )
 
-        self._test_bundled_aggregations(RelationTypes.THREAD, assert_thread, 8)
+        self._test_bundled_aggregations(RelationTypes.THREAD, assert_thread, 7)
 
     def test_nested_thread(self) -> None:
         """