!If not working on Serverless:Function handler about serverless-application-model

[xazhao]

Hello @des-psl , thanks for raising the issue.

As mentioned in #2533 SAM Transform does not support intrinsic functions for handler. So to make sure that SAM handles the created resources as you expect, we recommend you to use the AWS::LanguageExtensions Transform, and add it before SAM Transform so SAM receives the template after got processed, and intrinsic function got replaced with the actual values.

You can update your template, and replace

Transform: AWS::Serverless-2016-10-31

with

Transform:
  - AWS::LanguageExtensions
  - AWS::Serverless-2016-10-31

[des-psl]

@xazhao I tried your solution but still not working:

AWSTemplateFormatVersion: "2010-09-09"
Transform:
  - AWS::LanguageExtensions
  - AWS::Serverless-2016-10-31

[moelasmar]

Hi @des-psl,
Looking to your example, I think the problem is you defined the intrinsic function in the Globals section, and as it is not part of The CFN template anatomy (doc), so AWS::LanguageExtensions will not resolve the intrinsic functions defined in it. And since SAM Transform could not process the intrinsic functions, you are facing this problem.

The recommendation is not to use any intrinsic functions in the Globals section, and if you want to use intrinsic functions, you can use it in the resource itself.

[xazhao]

Closing the issue. Feel free to reopen it if you have other questions.

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