如何添加"updatedAt"Elasticsearch文档的时间戳 [英] How to add "updatedAt" timestamp to elasticsearch documents

问题描述

我想确保某个doc_type的所有文档都具有一个"updatedAt"时间戳(ISO 8601)，该时间戳将在文档更新时进行更新.它必须是服务器端的时间戳，因为我不知道我是否可以相信所有客户端时间都是同步的.

I want to ensure that all documents of a certain doc_type have a "updatedAt" timestamp (ISO 8601) that gets updated whenever the document is updated. It needs to be a server-side timestamp as I don't know if I can trust that all of the clients times are in sync.

我使用摄取管道添加"createdAt"时间戳，但似乎不支持使用更新API的管道.

I use an ingest pipeline to add "createdAt" timestamps, but it seems that pipelines are not supported using the update API.

我尝试使用更新脚本(使用新提供的'ctx._now'值)，但是无法将解析转换为ISO 8601.此外，我不确定更新脚本是否是最可维护的方法，因为每种更新类型都需要自定义脚本.

I've tried using update scripts (using the newly available 'ctx._now' value), but cannot get the parsing into ISO 8601 working. Further, I'm not sure that update scripts are the most maintainable way of doing this since every update type would require a custom script.

推荐答案

在我的脚本中，我使用下面的无痛行来标记"updatedAt timestamp":

In my scripts I use following painless line to mark updatedAt timestamp:

ctx._source.updatedAt = ZonedDateTime.ofInstant(Instant.ofEpochMilli(ctx._now), ZoneId.of("Z"));

Z区域ID是UTC时区. updatedAt 字段的日期类型设置为 date .奇怪的是，仅将 ctx._now 分配给字段也可以.但是它在来源上看起来与我的其他日期字段不同，因此我更喜欢采用上述方法来保持一致.

Z zone id is for UTC timezone. The updatedAt field has date type set as date. What is weird is that just assigning ctx._now to field also works. But it then looks different in source than rest of my date fields so I prefer the above way to keep things consistent.

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