可以触发什么事件来触发DynamoDB中的lambda函数？ [英] What event can be triggered to fire a lambda function in DynamoDB?

问题描述

我似乎找不到有关DynamoDB能够基于哪些事件触发lambda函数的文档。我所能找到的只是提及何时将新记录添加到表中或更新记录。这两个唯一动作/事件是否可用？或者，当我请求不存在的记录时（我将使用DynamoDB作为缓存的情况），我是否还可以触发lambda函数？

I can't seem to find the documentation on what kinds of events DynamoDB is able to trigger a lambda function based on. All I can find is mentions of when a new record is added to a table or a record is updated. Are those the two "only" actions/events available? Or could I also trigger a lambda function when I request a records that does not exists (which is what I need in my case, where I will be using DynamoDB as a cache)?

推荐答案

DynamoDB不支持自动触发Lambda函数，因为有人查询了不存在的键。您必须在查询代码中进行处理。

Triggering a Lambda function automatically because somebody queried for a key that doesn't exist is not supported by DynamoDB. You would have to handle that in your querying code.

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