AWS Step Functions - 将输入传递给另一个任务

Question

如何在 AWS Step Functions 的 task 中将输入传递到输出？

我知道和文档：

If the value of ResultPath is null, that means that the state’s own raw output is discarded and its raw input becomes its result.

但我需要的是：

根据我的意见

{
  "input": "my_input"
}

还有我的 lambda 输出

{
  "output": "my_output"
}

我需要将以下内容传递给下一个状态 json:

{
  "input": "my_input",
  "output": "my_output"
}

Answer 1

我想到了两个建议，Use ResultPath to Replace the Input with the Result，这样您就可以

If you don't specify a ResultPath, the default behavior is as if you had specified "ResultPath": "$". Because this tells the state to replace the entire input with the result, the state input is completely replaced by the result coming from the task result.

要使此选项起作用，Lambda 函数必须return 所需的响应：

{
  "input": "my_input",
  "output": "my_output"
}

或者在 Step Functions 开发人员指南中 Use ResultPath to Include the Result with the Input。接下来，如果您将 Lambda 的 return 值更改为只包含 "my_output"，您可以指定 "ResultPath": "$.output" 以获得所需的结果：

{
  "input": "my_input",
  "output": "my_output"
}

Answer 2

对于任何遇到这个问题的人来说，不可能按照我的要求去做，但是你可以做的是，according to the docs:

{
  "States": {
    "my-state": {
      "Type": "task",
      "ResultPath": "$.response"
    }
  }
}

这会将任何 lambda returns 附加到 response 节点中，结果是：

{
  "input": "my_input",
  "response": {
    "output": "my_output"
  }
}

AWS Step Functions - 将输入传递给另一个任务

AWS Step Functions - Pass input to another task

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