Allow retrieving the relations of a redacted event. (#12130)

This is allowed per MSC2675, although the original implementation did
not allow for it and would return an empty chunk / not bundle aggregations.

The main thing to improve is that the various caches get cleared properly
when an event is redacted, and that edits must not leak if the original
event is redacted (as that would presumably leak something similar to
the original event content).
This commit is contained in:
Patrick Cloke 2022-03-10 09:03:59 -05:00 committed by GitHub
parent 3e4af36bc8
commit 88cd6f9378
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
8 changed files with 119 additions and 80 deletions

View file

@ -1619,9 +1619,12 @@ class PersistEventsStore:
txn.call_after(prefill)
def _store_redaction(self, txn, event):
# invalidate the cache for the redacted event
def _store_redaction(self, txn: LoggingTransaction, event: EventBase) -> None:
# Invalidate the caches for the redacted event, note that these caches
# are also cleared as part of event replication in _invalidate_caches_for_event.
txn.call_after(self.store._invalidate_get_event_cache, event.redacts)
txn.call_after(self.store.get_relations_for_event.invalidate, (event.redacts,))
txn.call_after(self.store.get_applicable_edit.invalidate, (event.redacts,))
self.db_pool.simple_upsert_txn(
txn,
@ -1812,9 +1815,7 @@ class PersistEventsStore:
txn.call_after(self.store.get_applicable_edit.invalidate, (parent_id,))
if rel_type == RelationTypes.THREAD:
txn.call_after(
self.store.get_thread_summary.invalidate, (parent_id, event.room_id)
)
txn.call_after(self.store.get_thread_summary.invalidate, (parent_id,))
# It should be safe to only invalidate the cache if the user has not
# previously participated in the thread, but that's difficult (and
# potentially error-prone) so it is always invalidated.