State machine definition does not support JSONata

[villagoizi]

Does not support JSONata

Description
In this line of code it expects a state.Parameters but when you use JSONata everything changes from Parameters to Arguments.

serverless-step-functions/lib/deploy/stepFunctions/compileIamRole.js

Line 329 in 313355a

const functionName = state.Parameters.FunctionName;

You get the following exception when performing an sls deploy:
TypeError: Cannot read properties of undefined (reading 'FunctionName')

This is the definition used

Comment: Validate
StartAt: input validation
QueryLanguage: JSONata
States:
  input validation:
    Type: Task
    Resource: arn:aws:states:::lambda:invoke
    Output: '{% $states.result.Payload %}'
    Assign:
      command: '{% $merge([$states.input.params.path, $states.input.body]) %}'
      meta: '{% $states.input %}'
    Arguments:
      FunctionName:
        'Fn::GetAtt':
          - ValidatorLambda
          - Arn
      Payload:
        rule: ${file(src/model-config/schemas/update.yml)}
        payload: '{% $merge([$states.input.params.path, $states.input.body]) %}'
    Retry:
      - ErrorEquals:
          - States.ALL
        IntervalSeconds: 1
        MaxAttempts: 2
        BackoffRate: 1
        JitterStrategy: FULL
    End: true

Additional data

• Serverless Framework Core Version you're using: ^3
• The Plugin Version you're using: ^3.21.1
• Operating System: Linux

[olivierto]

• 1 same issue !
  Converted a big step function to JSONata in the AWS console... lost 2 days of work to realise that it's not supported :'(
  I will try to make a PR ...

[zirkelc]

@villagoizi I have implemented JSONata support in PR #636

It looks like it wasn't released yet, but you can use my preview branch: https://pkg.pr.new/zirkelc/serverless-step-functions@d2555b7

@horike37 when will you release a new version?

[edvaldoszy]

Hi everyone!

I created a PR adding support for Lambda: #645

[gson88]

Hmm I use JSONata in step functions without issues so far, am I using it wrong?
What is the purpose of making the resource arn:aws:states:::lambda:invoke instead of the lambda I want to invoke?

StartAt: CloneStuff
QueryLanguage: "JSONata"
States:
  CloneStuff:
    Type: Task
    Resource:
      Fn::GetAtt: [ function, Arn ]
    Assign:
      fromNodeId: "{% $states.input.projectId %}"
      toNodeId: "{% $states.result.nodeId %}"
      author: "{% $states.input.author %}"
    Next: CopySomeTypes
  CopySomeTypes:
    Type: Task
    Resource: resourceArn
    Arguments:
      author: "{% $author %}"
      fromNodeId: "{% $fromNodeId %}"
      toNodeId: "{% $toNodeId %}"
    Output:
      output:
        someType: "{% $states.result.body %}"
    End: true

[zirkelc]

@gson88 arn:aws:states:::lambda:invoke is called an optimized integration: https://docs.aws.amazon.com/step-functions/latest/dg/connect-lambda.html

[zirkelc]

Closed by #645

[electric-al]

Just to flag, the above #645 only supports a Lambdas, not wider set of ItemReaders (e.g s3 buckets). I'll try to do PR when i can

[zirkelc]

@electric-al that would be appreciated, thanks! 👍