amazon-web-services - AWS Step Functions - 将输入传递给另一个任务

Question

如何在 task 中将我的输入传递给我的输出在 AWS Step Functions 中？

我知道 this question ，以及文档:

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:

鉴于我的意见

{
  "input": "my_input"
}

还有我的 lambda 输出

{
  "output": "my_output"
}

我需要将以下 json 传递给下一个状态:

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

Answer 1

我想到了两个建议，要么Use ResultPath to Replace the Input with the Result ，这使您可以

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 函数必须返回所需的响应:

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

或者 Use ResultPath to Include the Result with the Input在 Step Functions 开发人员指南中。接下来，如果您将 Lambda 的返回值更改为仅包含 "my_output"您可以指定 "ResultPath": "$.output"达到预期的结果:

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