aws-cdk-lib/aws-apigatewayv2: ApiMapping module is not removing mapping path for custom domains

[Madhan-droid]

Describe the bug

Hello Everyone,
I was working on mapping my aws apigateway with custom domain name. I was able to create the api mapping using aws cdk. But I'm not able to remove the api mapping path even after removing ApimappingKey from the deployment code.

Regression Issue

• Select this option if this issue appears to be a regression.

Last Known Working CDK Version

No response

Expected Behavior

Initially I created the custom domain with no path.

Here's the code snippet I used for creating the api maping.

It created the api mapping with no path.

In next deployment I updated the code like this:

I can see the mapping with path:

But I removed the apiMappingKey from the deployment code then deployed it.

I'm assuming it should remove the path from the mapping.

Current Behavior

I can see the logs of the apimapping being updated:

But the mapping path is not removed.

Is it the default behaviour of aws cdk?

Reproduction Steps

I have mentioned everything above.

Possible Solution

The mapping should be removed.

Additional Information/Context

No response

CDK CLI Version

2.170.0

Framework Version

No response

Node.js Version

v22.11.0

OS

Windows 10

Language

TypeScript

Language Version

No response

Other information

No response

[khushail]

Hi @Madhan-droid , thanks for reaching out. Could you share the result of cdk diff when you removed the path from the code and re-deployed it ? It would also be helpful to look at synthesized template before and after the change

[github-actions]

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