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Add db migration that clears the cache

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This fixes spaces or stickers not showing up for old databases as well
as the wrong format of the state_keys db.
This commit is contained in:
Nicolas Werner 2021-08-22 14:45:57 +02:00
parent c7dc9fb17a
commit 63998a217a
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GPG key ID: C8D75E610773F2D9
2 changed files with 47 additions and 10 deletions
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56
src/Cache.cpp
View file

@ -35,7 +35,7 @@
//! Should be changed when a breaking change occurs in the cache format.
//! This will reset client's data.
static const std::string CURRENT_CACHE_FORMAT_VERSION("2020.10.20");
static const std::string CURRENT_CACHE_FORMAT_VERSION("2021.08.22");
static const std::string SECRET("secret");
//! Keys used for the DB
@ -891,12 +891,6 @@ Cache::setNextBatchToken(lmdb::txn &txn, const std::string &token)
syncStateDb_.put(txn, NEXT_BATCH_KEY, token);
}
void
Cache::setNextBatchToken(lmdb::txn &txn, const QString &token)
{
setNextBatchToken(txn, token.toStdString());
}
bool
Cache::isInitialized()
{
@ -1137,6 +1131,51 @@ Cache::runMigrations()
nhlog::db()->info("Successfully migrated olm sessions.");
return true;
}},
{"2021.08.22",
[this]() {
try {
auto txn = lmdb::txn::begin(env_, nullptr);
auto try_drop = [this, &txn](const std::string &dbName) {
try {
auto db = lmdb::dbi::open(txn, dbName.c_str());
db.drop(txn, true);
} catch (std::exception &e) {
nhlog::db()->warning(
"Failed to drop '{}': {}", dbName, e.what());
}
};
auto room_ids = getRoomIds(txn);
for (const auto &room : room_ids) {
try_drop(room + "/state");
try_drop(room + "/state_by_key");
try_drop(room + "/account_data");
try_drop(room + "/members");
try_drop(room + "/mentions");
try_drop(room + "/events");
try_drop(room + "/event_order");
try_drop(room + "/event2order");
try_drop(room + "/msg2order");
try_drop(room + "/order2msg");
try_drop(room + "/pending");
try_drop(room + "/related");
}
// clear db, don't delete
roomsDb_.drop(txn, false);
setNextBatchToken(txn, "");
txn.commit();
} catch (const lmdb::error &) {
nhlog::db()->critical("Failed to clear cache!");
return false;
}
nhlog::db()->info(
"Successfully cleared the cache. Will do a clean sync after startup.");
return true;
}},
};
nhlog::db()->info("Running migrations, this may take a while!");
@ -3230,8 +3269,7 @@ Cache::isNotificationSent(const std::string &event_id)
std::vector<std::string>
Cache::getRoomIds(lmdb::txn &txn)
{
auto db = lmdb::dbi::open(txn, ROOMS_DB, MDB_CREATE);
auto cursor = lmdb::cursor::open(txn, db);
auto cursor = lmdb::cursor::open(txn, roomsDb_);
std::vector<std::string> rooms;

1
src/Cache_p.h
View file

@ -692,7 +692,6 @@ private:
std::optional<UserKeyCache> userKeys_(const std::string &user_id, lmdb::txn &txn);
void setNextBatchToken(lmdb::txn &txn, const std::string &token);
void setNextBatchToken(lmdb::txn &txn, const QString &token);
lmdb::env env_;
lmdb::dbi syncStateDb_;