(stepfunctions): No replacement for JSONPath.numberAt, etc.

[snowe2010]

Describe the bug

Previously with step functions steps like DynamoPutItem, we were able to do DynamoAttributeValue.fromNumber(JsonPath.numberAt(key)), which would use JSONPath to access the number and save the number in dynamo. With JSONata it seems like there is no replacement for this. I tried DynamoAttributeValue.numberFromString("$states.input.blah") but that fails with The parameter cannot be converted to a numeric value: $states.input.blah, as I'm pretty sure that's for turning a string like "1" into the numeric in DDB.

This is most likely a missed part of the addition of JSONata, and not a bug, but it still prevents migration to JSONata for any Dynamo related steps. There are other functions in the DynamoAttributeValue class like listFromJsonata, mapFromJsonata, and booleanFromJsonata so I'm unsure whether this should be a new method on the DynamoAttributeValue class or if it should be its own replacement like JSONata.numberAt.

Regression Issue

• Select this option if this issue appears to be a regression.

Last Known Working CDK Version

No response

Expected Behavior

I would either expect to have a new class software.amazon.awscdk.services.stepfunctions.JSONata with functions equivalent to those of software.amazon.awscdk.services.stepfunctions.JSONPath, or for there to be methods on DynamoAttributeValue for JSONata.

Current Behavior

No ability to translate JSONata paths into Dynamo attributes.

Reproduction Steps

There is no reproduction for this because there is no function to achieve this. The bug is a missing method or class.

Possible Solution

No response

Additional Information/Context

No response

CDK CLI Version

2.178.0

Framework Version

2.178.0

Node.js Version

v22.8.0

OS

macOS

Language

Java

Language Version

Kotlin 2.1.10 JVM 21

Other information

No response

[snowe2010]

Never mind, I was forgetting to use {% %} in the string, so the correct solution is DynamoAttributeValue.numberFromString("{% $states.input.blah %}")

[github-actions]

Comments on closed issues and PRs are hard for our team to see.
If you need help, please open a new issue that references this one.