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Invalidate caches when an event with a relation is redacted. (#12121)

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The caches for the target of the relation must be cleared
so that the bundled aggregations are re-calculated after
the redaction is processed.
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Patrick Cloke 2022-03-07 09:00:05 -05:00 • committed by GitHub
parent 0211f18d65
commit f63bedef07
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6 changed files with 205 additions and 51 deletions
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38
synapse/storage/databases/main/events.py
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@ -1518,7 +1518,7 @@ class PersistEventsStore:
)
# Remove from relations table.
self._handle_redaction(txn, event.redacts)
self._handle_redact_relations(txn, event.redacts)
# Update the event_forward_extremities, event_backward_extremities and
# event_edges tables.
@ -1943,15 +1943,43 @@ class PersistEventsStore:
txn.execute(sql, (batch_id,))
def _handle_redaction(self, txn, redacted_event_id):
"""Handles receiving a redaction and checking whether we need to remove
any redacted relations from the database.
def _handle_redact_relations(
self, txn: LoggingTransaction, redacted_event_id: str
) -> None:
"""Handles receiving a redaction and checking whether the redacted event
has any relations which must be removed from the database.
Args:
txn
redacted_event_id (str): The event that was redacted.
redacted_event_id: The event that was redacted.
"""
# Fetch the current relation of the event being redacted.
redacted_relates_to = self.db_pool.simple_select_one_onecol_txn(
txn,
table="event_relations",
keyvalues={"event_id": redacted_event_id},
retcol="relates_to_id",
allow_none=True,
)
# Any relation information for the related event must be cleared.
if redacted_relates_to is not None:
self.store._invalidate_cache_and_stream(
txn, self.store.get_relations_for_event, (redacted_relates_to,)
)
self.store._invalidate_cache_and_stream(
txn, self.store.get_aggregation_groups_for_event, (redacted_relates_to,)
)
self.store._invalidate_cache_and_stream(
txn, self.store.get_applicable_edit, (redacted_relates_to,)
)
self.store._invalidate_cache_and_stream(
txn, self.store.get_thread_summary, (redacted_relates_to,)
)
self.store._invalidate_cache_and_stream(
txn, self.store.get_thread_participated, (redacted_relates_to,)
)
self.db_pool.simple_delete_txn(
txn, table="event_relations", keyvalues={"event_id": redacted_event_id}
)