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fix(core): apply overrides after rendering properties #2685

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merged 2 commits into from
May 30, 2019

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@eladb eladb commented May 30, 2019

Resource overrides (addOverride and addPropertyOverride) should be
applied after rendering properties at the L1 level. Otherwise, validation
and capitalization changes would be applied to overrides and this
contradicts the idea of being able to specify arbitrary overrides as
"patches" to the synthesized resource.

The previous behavior had two adverse effects:

  1. If a property was unknown, it would be omitted from the resource
  2. Properties names would need to be capitalized in camel case instead of 1:1 with the CFN schema.

Fixes #2677

BREAKING CHANGE: Properties passed to addPropertyOverride should match in capitalization to the CloudFormation schema (normally pascal case). For example, addPropertyOverride('accessControl', 'xxx') should now be addPropertyOverride('AccessControl', 'xxx').


Pull Request Checklist

  • Testing
    • Unit test added (prefer not to modify an existing test, otherwise, it's probably a breaking change)
    • CLI change?: coordinate update of integration tests with team
    • cdk-init template change?: coordinated update of integration tests with team
  • Docs
    • jsdocs: All public APIs documented
    • README: README and/or documentation topic updated
    • Design: For significant features, design document added to design folder
  • Title and Description
    • Change type: title prefixed with fix, feat and module name in parens, which will appear in changelog
    • Title: use lower-case and doesn't end with a period
    • Breaking?: last paragraph: "BREAKING CHANGE: <describe what changed + link for details>"
    • Issues: Indicate issues fixed via: "Fixes #xxx" or "Closes #xxx"
  • Sensitive Modules (requires 2 PR approvers)
    • IAM Policy Document (in @aws-cdk/aws-iam)
    • EC2 Security Groups and ACLs (in @aws-cdk/aws-ec2)
    • Grant APIs (only if not based on official documentation with a reference)

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license.

Resource overrides (`addOverride` and `addPropertyOverride`) should be
applied after rendering properties at the L1 level. Otherwise, validation
and capitalization changes would be applied to overrides and this
contradicts the idea of being able to specify arbitrary overrides as
"patches" to the synthesized resource.

The previous behavior had two adverse effects:
1. If a property was unknown, it would be omitted from the resource
2. Properties names would need to be capitalized in camel case instead of 1:1 with the CFN schema.

Fixes #2677

BREAKING CHANGE: Properties passed to `addPropertyOverride` should match in capitalization to the CloudFormation schema (normally pascal case). For example, `addPropertyOverride('accessControl', 'xxx')` should now be `addPropertyOverride('AccessControl', 'xxx')`.
@eladb eladb requested a review from a team as a code owner May 30, 2019 13:44
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mergify bot commented Sep 23, 2019

Thanks so much for taking the time to contribute to the AWS CDK ❤️

We will shortly assign someone to review this pull request and help get it
merged. In the meantime, please take a minute to make sure you follow this
checklist
:

  • PR title type(scope): text
    • type: fix, feat, refactor go into CHANGELOG, chore is hidden
    • scope: name of module without aws- or cdk- prefix or postfix (e.g. s3 instead of aws-s3-deployment)
    • text: use all lower-case, do not end with a period, do not include issue refs
  • PR Description
    • Rationale: describe rationale of change and approach taken
    • Issues: indicate issues fixed via: fixes #xxx or closes #xxx
    • Breaking?: last paragraph: BREAKING CHANGE: <describe what changed + link for details>
  • Testing
    • Unit test added. Prefer to add a new test rather than modify existing tests
    • CLI or init templates change? Re-run/add CLI integration tests
  • Documentation
    • README: update module README to describe new features
    • API docs: public APIs must be documented. Copy from official AWS docs when possible
    • Design: for significant features, follow design process

This was referenced Dec 12, 2019
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addPropertyOverride() does not seem to work
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