Hi, I'd like to add time filed in the event, the following example appears to add a string type "formatted_time", but I need a time type field. ``` <filter pattern> @type record_modifier <record> formatted_time ${Time.at(time).to_s} </record> </filter> ``` I try the following way ``` <filter pattern> @type record_modifier <record> formatted_time ${time} </record> </filter> ``` But I got the following errors: ``` 2021-11-10 06:24:28.085795373 +0000 fluent.warn: {"error":"#<NoMethodError: undefined method `to_msgpack' for 2021-11-10 06:24:28 +0000:Time>","location":"/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-1.10.2/lib/fluent/event.rb:60:in `write'","tag":"iam.gu.cn.admin_api","message":"emit transaction failed: error_class=NoMethodError error=\"undefined method `to_msgpack' for 2021-11-10 06:24:28 +0000:Time\" location=\"/opt/td-agent/embedded/lib/ruby/gems/2.4.0/gems/fluentd-1.10.2/lib/fluent/event.rb:60:in `write'\" tag=\"iam.gu.cn.admin_api\""} ``` Please advise is it feasible to add a time type filed in the fluentd event? Thank you in adance.
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