arm-resource-patch

Id

@azure-tools/typespec-azure-resource-manager/arm-resource-patch

Validate ARM PATCH operations.

The request body of a PATCH must be a model with a subset of the resource properties. The PATCH body must not contain properties that do not exist on the resource.

Impact

• Area: API

Inconsistent PATCH properties violate the RPC contract.

LintDiff Equivalent

This rule corresponds to the LintDiff rule ConsistentPatchProperties.

❌ Incorrect

model FooResource is TrackedResource<FooProperties> {
  ...ResourceNameParameter<FooResource>;
}

model MyBadPatch {
  name?: string;
  ...Foundations.ArmTagsProperty;
  blah?: string; // does not exist on FooResource
}

✅ Correct

model FooResource is TrackedResource<FooProperties> {
  ...ResourceNameParameter<FooResource>;
}

model FooPatch {
  name?: string;
  ...Foundations.ArmTagsProperty;
  properties?: FooProperties;
}

Suppression

Suppress per the RPC guidelines; otherwise use the standard PATCH operations.