Batch ArrayProperties configured from input in Step Functions

Question

I'd like to have the size of a Batch job be configurable from inputs of a Step Function.

However, both:
```
"ArrayProperties": {
  "Size": "$.ArraySize"
}
```
and
```
"ArrayProperties": {
  "Size": $.ArraySize
}
```
do not work. The former complains that type, string, is invalid for the paramter, and the latter complains of a syntax error.

Is it what I'd like to achieve possible?

Accepted Answer

Hi,

This should be possible. Can you please try the following:
```
        "ArrayProperties": {
            "Size.$": "$.ArraySize"
        },
```

I have just tried this out and the size parameter now takes it's value from the input. Please check out this part of our documentation for additional details in setting parameters -> https://docs.aws.amazon.com/step-functions/latest/dg/input-output-inputpath-params.html#input-output-parameters

If this does not work, kindly send your task state and I will check if I may have missed anything.

Batch ArrayProperties configured from input in Step Functions

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Batch ArrayProperties configured from input in Step Functions