cache组件并发下，如果不设置模型字段缓存，会经常把报错

[augushong]

如下面报错，其实不用特别的高并发，用workerman开4个进程，如果有频繁的模型save，没有开启数据库字段缓存，就会频繁出现下面的报错。

TypeError: think\cache\driver\Redis::getTagItems(): Return value must be of type array, bool returned in /home/augushong/www/ulthon_admin/vendor/topthink/framework/src/think/cache/driver/Redis.php:233
Stack trace:
#0 /home/augushong/www/ulthon_admin/vendor/topthink/framework/src/think/cache/TagSet.php(112): think\cache\driver\Redis->getTagItems()
#1 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/db/PDOConnection.php(877): think\cache\TagSet->clear()
#2 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/db/PDOConnection.php(1167): think\db\PDOConnection->pdoExecute()
#3 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/db/BaseQuery.php(1260): think\db\PDOConnection->update()
#4 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/Model.php(673): think\db\BaseQuery->update()
#5 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/db/PDOConnection.php(1521): think\Model->think\{closure}()
#6 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/db/concern/Transaction.php(47): think\db\PDOConnection->transaction()
#7 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/Model.php(665): think\db\BaseQuery->transaction()
#8 /home/augushong/www/ulthon_admin/vendor/topthink/think-orm/src/Model.php(564): think\Model->updateData()
#9 /home/augushong/www/ulthon_admin/app/worker/net/worker/start.php(86): think\Model->save()
#10 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Events/Event.php(167): app\common\console\WorkerCommandConsole->{closure}()
#11 [internal function]: Workerman\Events\Event->timerCallback()
#12 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Events/Event.php(193): EventBase->loop()
#13 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Worker.php(1635): Workerman\Events\Event->loop()
#14 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Worker.php(1426): Workerman\Worker::forkOneWorkerForLinux()
#15 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Worker.php(1400): Workerman\Worker::forkWorkersForLinux()
#16 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Worker.php(1785): Workerman\Worker::forkWorkers()
#17 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Worker.php(1721): Workerman\Worker::monitorWorkersForLinux()
#18 /home/augushong/www/ulthon_admin/vendor/workerman/workerman/Worker.php(562): Workerman\Worker::monitorWorkers()
#19 /home/augushong/www/ulthon_admin/app/common/console/WorkerCommandConsole.php(84): Workerman\Worker::runAll()
#20 /home/augushong/www/ulthon_admin/app/common/command/fusion/NetWorker.php(35): app\common\console\WorkerCommandConsole->execute()
#21 /home/augushong/www/ulthon_admin/vendor/topthink/framework/src/think/console/Command.php(210): app\common\command\fusion\NetWorker->execute()
#22 /home/augushong/www/ulthon_admin/vendor/topthink/framework/src/think/Console.php(649): think\console\Command->run()
#23 /home/augushong/www/ulthon_admin/vendor/topthink/framework/src/think/Console.php(308): think\Console->doRunCommand()
#24 /home/augushong/www/ulthon_admin/vendor/topthink/framework/src/think/Console.php(245): think\Console->doRun()
#25 /home/augushong/www/ulthon_admin/think(12): think\Console->run()
#26 {main}

[big-dream]

有点奇怪，按照 phpredis 的文档，返回类型应该只有 array，不应该返回 bool