Indexing an array of records

RE: Indexing an array of records

Mike Schmitt — Thu, 28 May 2026 13:51:40 GMT

[quote userid="113611" url="~/discussions/f/general/40464/indexing-an-array-of-records/154732"]

Such a simple mistake.... so much time lost.

[/quote]

Been there, hah.

RE: Indexing an array of records

stevenh6272 — Thu, 28 May 2026 13:43:34 GMT

Ran just fine using the [] indexing with an actual Numeric indexer.

Thanks all.

RE: Indexing an array of records

stevenh6272 — Thu, 28 May 2026 13:41:09 GMT

Aha! I had not noticed the data type issue. That would explain the matter.

The expression rule does accept an integer and Appian automatically converts the Text string to a number.

Such a simple mistake.... so much time lost.

Thank you!

RE: Indexing an array of records

Mike Schmitt — Thu, 28 May 2026 13:37:32 GMT

e.g.

RE: Indexing an array of records

Shubham Aware — Thu, 28 May 2026 13:35:53 GMT

recordIndex is Text, not Integer. Record arrays must be indexed by an integer.
Change recordIndex to Number (Integer), or use index(pv!performanceRecords, tointeger(pv!recordIndex), null).

RE: Indexing an array of records

Mike Schmitt — Thu, 28 May 2026 13:35:27 GMT

What happens if you replace "pv!recordIndex" in your test code here with the literal value of "1"? e.g. index(pv!record, 1, null())

Because I suspect this might be messing you up:

RE: Indexing an array of records

stevenh6272 — Thu, 28 May 2026 13:33:05 GMT

Here is the exact line in the script task:

pv!performanceRecords[pv!recordIndex]

Here is the error:

Here is the screen shot of the data type

Here's the exact line using index (without a default)

index(pv!performanceRecords, pv!recordIndex)

Here's the error:

Now, you had mentioned using index with a default of null. When I do this, it assigns null to the output variable (which of course causes downstream failures because a record is expected).

index(pv!performanceRecords, pv!recordIndex, null)

But expression rules can do both of these things without any problem.

RE: Indexing an array of records

Shubham Aware — Thu, 28 May 2026 13:04:15 GMT

Can you share your code snippet here?

RE: Indexing an array of records

stevenh6272 — Thu, 28 May 2026 12:59:30 GMT

I did and received the same error.

RE: Indexing an array of records

Mike Schmitt — Thu, 28 May 2026 12:57:44 GMT

is the PV actually set to Array/Multiple type?

RE: Indexing an array of records

Stefan Helzle — Thu, 28 May 2026 05:57:58 GMT

pv!myRecords[pv!recordIndex] works, if the PV is a list.

RE: Indexing an array of records

Shubham Aware — Thu, 28 May 2026 04:45:29 GMT

Bracket notation on a record array is reserved for field/relationship indexing, not integer position.Bracket notation on a record array is reserved for field/relationship indexing, not integer position.

Use index(pv!myRecords, pv!recordIndex, null) instead.

RE: Indexing an array of records

shivakanthreddyp0001 — Wed, 27 May 2026 23:19:07 GMT

Can you please share screenshot of what stored in the pv

RE: Indexing an array of records

stevenh6272 — Wed, 27 May 2026 18:41:18 GMT

Here's the error

An error occurred while evaluating expression: myRec:pv!myRecords[pv!recordIndex] (Expression evaluation error: PE My RecType must be indexed by its corresponding record type fields or relationships) (Data Outputs)

RE: Indexing an array of records

stevenh6272 — Wed, 27 May 2026 18:37:16 GMT

Yes, sorry, I forgot to post the error message. I need to regenerate the error and I will post the message in a bit.

Thanks.

RE: Indexing an array of records

Stefan Helzle — Wed, 27 May 2026 18:35:41 GMT

[quote userid="113611" url="~/discussions/f/general/40464/indexing-an-array-of-records"]However, this syntax does not work within the process model:[/quote]

What do you mean? What do you observe?