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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.
This commit is contained in:
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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1
changelog.d/12113.bugfix Normal file
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@ -0,0 +1 @@
Fix a long-standing bug when redacting events with relations.

1
changelog.d/12113.misc
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@ -1 +0,0 @@
Refactor the tests for event relations.

1
changelog.d/12121.bugfix Normal file
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@ -0,0 +1 @@
Fix a long-standing bug when redacting events with relations.

2
synapse/storage/databases/main/cache.py
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@ -200,6 +200,8 @@ class CacheInvalidationWorkerStore(SQLBaseStore):
self.get_relations_for_event.invalidate((relates_to,))
self.get_aggregation_groups_for_event.invalidate((relates_to,))
self.get_applicable_edit.invalidate((relates_to,))
self.get_thread_summary.invalidate((relates_to,))
self.get_thread_participated.invalidate((relates_to,))
async def invalidate_cache_and_stream(self, cache_name: str, keys: Tuple[Any, ...]):
"""Invalidates the cache and adds it to the cache stream so slaves

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}
)

213
tests/rest/client/test_relations.py
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@ -1273,7 +1273,21 @@ class RelationsTestCase(BaseRelationsTestCase):
class RelationRedactionTestCase(BaseRelationsTestCase):
"""Test the behaviour of relations when the parent or child event is redacted."""
"""
Test the behaviour of relations when the parent or child event is redacted.
The behaviour of each relation type is subtly different which causes the tests
to be a bit repetitive, they follow a naming scheme of:
test_redact_(relation|parent)_{relation_type}
The first bit of "relation" means that the event with the relation defined
on it (the child event) is to be redacted. A "parent" means that the target
of the relation (the parent event) is to be redacted.
The relation_type describes which type of relation is under test (i.e. it is
related to the value of rel_type in the event content).
"""
def _redact(self, event_id: str) -> None:
channel = self.make_request(
@ -1284,9 +1298,53 @@ class RelationRedactionTestCase(BaseRelationsTestCase):
)
self.assertEqual(200, channel.code, channel.json_body)
def _make_relation_requests(self) -> Tuple[List[str], JsonDict]:
"""
Makes requests and ensures they result in a 200 response, returns a
tuple of results:
1. `/relations` -> Returns a list of event IDs.
2. `/event` -> Returns the response's m.relations field (from unsigned),
if it exists.
"""
# Request the relations of the event.
channel = self.make_request(
"GET",
f"/_matrix/client/unstable/rooms/{self.room}/relations/{self.parent_id}",
access_token=self.user_token,
)
self.assertEquals(200, channel.code, channel.json_body)
event_ids = [ev["event_id"] for ev in channel.json_body["chunk"]]
# Fetch the bundled aggregations of the event.
channel = self.make_request(
"GET",
f"/_matrix/client/unstable/rooms/{self.room}/event/{self.parent_id}",
access_token=self.user_token,
)
self.assertEquals(200, channel.code, channel.json_body)
bundled_relations = channel.json_body["unsigned"].get("m.relations", {})
return event_ids, bundled_relations
def _get_aggregations(self) -> List[JsonDict]:
"""Request /aggregations on the parent ID and includes the returned chunk."""
channel = self.make_request(
"GET",
f"/_matrix/client/unstable/rooms/{self.room}/aggregations/{self.parent_id}",
access_token=self.user_token,
)
self.assertEqual(200, channel.code, channel.json_body)
return channel.json_body["chunk"]
def test_redact_relation_annotation(self) -> None:
"""Test that annotations of an event are properly handled after the
"""
Test that annotations of an event are properly handled after the
annotation is redacted.
The redacted relation should not be included in bundled aggregations or
the response to relations.
"""
channel = self._send_relation(RelationTypes.ANNOTATION, "m.reaction", "a")
self.assertEqual(200, channel.code, channel.json_body)
@ -1296,24 +1354,97 @@ class RelationRedactionTestCase(BaseRelationsTestCase):
RelationTypes.ANNOTATION, "m.reaction", "a", access_token=self.user2_token
)
self.assertEqual(200, channel.code, channel.json_body)
unredacted_event_id = channel.json_body["event_id"]
# Both relations should exist.
event_ids, relations = self._make_relation_requests()
self.assertCountEqual(event_ids, [to_redact_event_id, unredacted_event_id])
self.assertEquals(
relations["m.annotation"],
{"chunk": [{"type": "m.reaction", "key": "a", "count": 2}]},
)
# Both relations appear in the aggregation.
chunk = self._get_aggregations()
self.assertEqual(chunk, [{"type": "m.reaction", "key": "a", "count": 2}])
# Redact one of the reactions.
self._redact(to_redact_event_id)
# Ensure that the aggregations are correct.
channel = self.make_request(
"GET",
f"/_matrix/client/unstable/rooms/{self.room}/aggregations/{self.parent_id}",
access_token=self.user_token,
)
self.assertEqual(200, channel.code, channel.json_body)
self.assertEqual(
channel.json_body,
# The unredacted relation should still exist.
event_ids, relations = self._make_relation_requests()
self.assertEquals(event_ids, [unredacted_event_id])
self.assertEquals(
relations["m.annotation"],
{"chunk": [{"type": "m.reaction", "key": "a", "count": 1}]},
)
def test_redact_relation_edit(self) -> None:
# The unredacted aggregation should still exist.
chunk = self._get_aggregations()
self.assertEqual(chunk, [{"type": "m.reaction", "key": "a", "count": 1}])
@unittest.override_config({"experimental_features": {"msc3440_enabled": True}})
def test_redact_relation_thread(self) -> None:
"""
Test that thread replies are properly handled after the thread reply redacted.
The redacted event should not be included in bundled aggregations or
the response to relations.
"""
channel = self._send_relation(
RelationTypes.THREAD,
EventTypes.Message,
content={"body": "reply 1", "msgtype": "m.text"},
)
self.assertEqual(200, channel.code, channel.json_body)
unredacted_event_id = channel.json_body["event_id"]
# Note that the *last* event in the thread is redacted, as that gets
# included in the bundled aggregation.
channel = self._send_relation(
RelationTypes.THREAD,
EventTypes.Message,
content={"body": "reply 2", "msgtype": "m.text"},
)
self.assertEqual(200, channel.code, channel.json_body)
to_redact_event_id = channel.json_body["event_id"]
# Both relations exist.
event_ids, relations = self._make_relation_requests()
self.assertEquals(event_ids, [to_redact_event_id, unredacted_event_id])
self.assertDictContainsSubset(
{
"count": 2,
"current_user_participated": True,
},
relations[RelationTypes.THREAD],
)
# And the latest event returned is the event that will be redacted.
self.assertEqual(
relations[RelationTypes.THREAD]["latest_event"]["event_id"],
to_redact_event_id,
)
# Redact one of the reactions.
self._redact(to_redact_event_id)
# The unredacted relation should still exist.
event_ids, relations = self._make_relation_requests()
self.assertEquals(event_ids, [unredacted_event_id])
self.assertDictContainsSubset(
{
"count": 1,
"current_user_participated": True,
},
relations[RelationTypes.THREAD],
)
# And the latest event is now the unredacted event.
self.assertEqual(
relations[RelationTypes.THREAD]["latest_event"]["event_id"],
unredacted_event_id,
)
def test_redact_parent_edit(self) -> None:
"""Test that edits of an event are redacted when the original event
is redacted.
"""
@ -1331,34 +1462,19 @@ class RelationRedactionTestCase(BaseRelationsTestCase):
self.assertEqual(200, channel.code, channel.json_body)
# Check the relation is returned
channel = self.make_request(
"GET",
f"/_matrix/client/unstable/rooms/{self.room}/relations"
f"/{self.parent_id}/m.replace/m.room.message",
access_token=self.user_token,
)
self.assertEqual(200, channel.code, channel.json_body)
self.assertIn("chunk", channel.json_body)
self.assertEqual(len(channel.json_body["chunk"]), 1)
event_ids, relations = self._make_relation_requests()
self.assertEqual(len(event_ids), 1)
self.assertIn(RelationTypes.REPLACE, relations)
# Redact the original event
self._redact(self.parent_id)
# Try to check for remaining m.replace relations
channel = self.make_request(
"GET",
f"/_matrix/client/unstable/rooms/{self.room}/relations"
f"/{self.parent_id}/m.replace/m.room.message",
access_token=self.user_token,
)
self.assertEqual(200, channel.code, channel.json_body)
# The relations are not returned.
event_ids, relations = self._make_relation_requests()
self.assertEqual(len(event_ids), 0)
self.assertEqual(relations, {})
# Check that no relations are returned
self.assertIn("chunk", channel.json_body)
self.assertEqual(channel.json_body["chunk"], [])
def test_redact_parent(self) -> None:
def test_redact_parent_annotation(self) -> None:
"""Test that annotations of an event are redacted when the original event
is redacted.
"""
@ -1366,16 +1482,23 @@ class RelationRedactionTestCase(BaseRelationsTestCase):
channel = self._send_relation(RelationTypes.ANNOTATION, "m.reaction", key="👍")
self.assertEqual(200, channel.code, channel.json_body)
# The relations should exist.
event_ids, relations = self._make_relation_requests()
self.assertEqual(len(event_ids), 1)
self.assertIn(RelationTypes.ANNOTATION, relations)
# The aggregation should exist.
chunk = self._get_aggregations()
self.assertEqual(chunk, [{"type": "m.reaction", "key": "👍", "count": 1}])
# Redact the original event.
self._redact(self.parent_id)
# Check that aggregations returns zero
channel = self.make_request(
"GET",
f"/_matrix/client/unstable/rooms/{self.room}/aggregations/{self.parent_id}/m.annotation/m.reaction",
access_token=self.user_token,
)
self.assertEqual(200, channel.code, channel.json_body)
# The relations are not returned.
event_ids, relations = self._make_relation_requests()
self.assertEqual(event_ids, [])
self.assertEqual(relations, {})
self.assertIn("chunk", channel.json_body)
self.assertEqual(channel.json_body["chunk"], [])
# There's nothing to aggregate.
chunk = self._get_aggregations()
self.assertEqual(chunk, [])