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CFN: add support for passing objects in GetAtt#13206

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pinzon merged 2 commits intomainfrom
cp/cfn/iam-resource-provider
Oct 8, 2025
Merged

CFN: add support for passing objects in GetAtt#13206
pinzon merged 2 commits intomainfrom
cp/cfn/iam-resource-provider

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@pinzon pinzon commented Sep 29, 2025 •
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Motivation

This PR enables Fn::GetAtt to return objects (e.g., nested or structured data) as values, a feature primarily used by CDK utilities like the JSON generator. This is critical for complex CDK constructs that rely on downstream resources expecting well-defined object structures.

Changes

  • Enable Fn::GetAtt to pass objects as values.

Testing

  • Since this is required for Custom Resources, the test is added in another repository.

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github-actions bot commented Sep 29, 2025 •
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Test Results - Preflight, Unit

22 292 tests  ±0   20 549 ✅ ±0   15m 39s ⏱️ ±0s
     1 suites ±0    1 743 💤 ±0 
     1 files   ±0        0 ❌ ±0 

Results for commit d61f59d. ± Comparison against base commit b592fbd.

♻️ This comment has been updated with latest results.

@pinzon pinzon added aws:cloudformation AWS CloudFormation semver: patch Non-breaking changes which can be included in patch releases aws:cloudformation:v2 Issues related to the V2 CloudFormation engine docs: skip Pull request does not require documentation changes labels Sep 29, 2025
@pinzon pinzon added this to the Playground milestone Sep 29, 2025
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Test Results (amd64) - Acceptance

7 tests  ±0   5 ✅ ±0   3m 23s ⏱️ -1s
1 suites ±0   2 💤 ±0 
1 files   ±0   0 ❌ ±0 

Results for commit d61f59d. ± Comparison against base commit b592fbd.

♻️ This comment has been updated with latest results.

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LocalStack Community integration with Pro

  2 files  ±    0    2 suites  ±0   34m 44s ⏱️ - 1h 26m 3s
576 tests  - 4 226  461 ✅  - 4 003  115 💤  - 223  0 ❌ ±0 
578 runs   - 4 226  461 ✅  - 4 003  117 💤  - 223  0 ❌ ±0 

Results for commit d61f59d. ± Comparison against base commit b592fbd.

This pull request removes 4226 tests. 
tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_lambda_dynamodb
tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_opensearch_crud
tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_search_books
tests.aws.scenario.bookstore.test_bookstore.TestBookstoreApplication ‑ test_setup
tests.aws.scenario.kinesis_firehose.test_kinesis_firehose.TestKinesisFirehoseScenario ‑ test_kinesis_firehose_s3
tests.aws.scenario.lambda_destination.test_lambda_destination_scenario.TestLambdaDestinationScenario ‑ test_destination_sns
tests.aws.scenario.lambda_destination.test_lambda_destination_scenario.TestLambdaDestinationScenario ‑ test_infra
tests.aws.scenario.loan_broker.test_loan_broker.TestLoanBrokerScenario ‑ test_prefill_dynamodb_table
tests.aws.scenario.loan_broker.test_loan_broker.TestLoanBrokerScenario ‑ test_stepfunctions_input_recipient_list[step_function_input0-SUCCEEDED]
tests.aws.scenario.loan_broker.test_loan_broker.TestLoanBrokerScenario ‑ test_stepfunctions_input_recipient_list[step_function_input1-SUCCEEDED]
…

♻️ This comment has been updated with latest results.

@pinzon pinzon added the notes: skip Pull request does not have to be mentioned in the release notes label Sep 29, 2025
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Test Results (amd64) - Integration, Bootstrap

  5 files    5 suites   48m 14s ⏱️
600 tests 486 ✅ 114 💤 0 ❌
606 runs  486 ✅ 120 💤 0 ❌

Results for commit d61f59d.

♻️ This comment has been updated with latest results.

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Test Results - Alternative Providers

575 tests   330 ✅  25m 44s ⏱️
  1 suites  245 💤
  1 files      0 ❌

Results for commit d61f59d.

♻️ This comment has been updated with latest results.

@pinzon pinzon marked this pull request as ready for review September 29, 2025 19:45
dominikschubert
dominikschubert suggested changes Oct 2, 2025
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Minor change request, then good to go 👍

@dominikschubert dominikschubert self-requested a review October 2, 2025 17:42
dominikschubert
dominikschubert approved these changes Oct 2, 2025
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LGTM, thanks for addressing my comment by adding additional documentation on the allowed property types 👍

@pinzon pinzon force-pushed the cp/cfn/iam-resource-provider branch from bff5621 to d61f59d Compare October 7, 2025 19:48
@pinzon pinzon merged commit 0943c36 into main Oct 8, 2025
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@pinzon pinzon deleted the cp/cfn/iam-resource-provider branch October 8, 2025 17:44
baermat pushed a commit that referenced this pull request Oct 13, 2025
@pinzon @baermat
CFN: add support for passing objects in GetAtt (#13206)
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aws:cloudformation:v2 Issues related to the V2 CloudFormation engine aws:cloudformation AWS CloudFormation docs: skip Pull request does not require documentation changes notes: skip Pull request does not have to be mentioned in the release notes semver: patch Non-breaking changes which can be included in patch releases

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