How to use Sub and GetAtt functions at the same time in CloudFormation template?

Question

I create CloudFormation yaml template and I need to use !GetAtt \"TestLambda.Arn\" as part of !Sub function in \"AWS::ApiGateway::Method\" Integrat

Answer 1

AWS CloudFormation provides several built-in functions that help you manage your stacks. Use intrinsic functions in your templates to assign values to properties that are not available until runtime.

Source from AWS

The Fn::GetAtt intrinsic function returns the value of an attribute from a resource in the template.

Declaration

• JSON
  • { "Fn::GetAtt" : [ "logicalNameOfResource", "attributeName" ] }
• YAML
  • Syntax for the full function name:
  • Fn::GetAtt: [ logicalNameOfResource, attributeName ]
• Syntax for the short form:
  • !GetAtt logicalNameOfResource.attributeName

Note: Should not confuse with double colon: Fn::GetAtt is like Fn_GetAtt