Lifecycle: Unable to perform postcondition on lambda result

[nitaysol]

Expected Behavior

I'm trying to verify lambda invocation result and accordingly if the lambda result indicates a failure I want to fail the 'apply' stage. As described in the documentation I've created a lifecycle.postCondition on the dataAwsLambdaInvocation in order to do so. The lambda invocation returns a json with 'statusCode' - 200 for success, 500 for failure. My DataAwsLambdaInvocation variable is corresponding to the invocation itself('invocation') and is as follows:

        new dataAwsLambdaInvocation.DataAwsLambdaInvocation(this, `${id}`, {
            functionName: `${my_lambda_fun}.arn`,
            input: '',
            dependsOn: [invocation],
            lifecycle: {
                postcondition: [
                    {
                        condition: `${Fn.lookup(Fn.jsondecode(invocation.result), 'statusCode')} == 200}`,
                        errorMessage: 'error_test',
                    },
                ],
            },
        });

Actual Behavior

cdktf plan fails with:

│ Error: Invalid condition result
                 │ 
                 │   on cdk.tf.json line 44, in data.aws_lambda_invocation-*-data(*-data).lifecycle.postcondition[0]:
                 │   44:               "condition": "${jsondecode(aws_lambda_invocation*-invoc (*-invoc).result).statusCode} == 200}",

Steps to Reproduce

1. Create lambdaFunction variable 'lambda'.
2. Create lambdaInvocation.LambdaInvocation variable 'invocation' corresponding to the 'lambda' created on step 1.
3. Create dataAwsLambdaInvocation.DataAwsLambdaInvocation variable 'invocationData' with the same values as the 'invocation' itself(as the documentation says) and with postcondition that accessing the 'invocation'.result value

Versions

language: typescript cdktf-cli: 0.17.3 node: v18.17.1 cdktf: null constructs: null jsii: null terraform: 1.5.5 arch: x64 os: linux 5.15.0-89-generic

Providers

┌───────────────┬──────────────────┬─────────┬────────────┬─────────────────────┬─────────────────┐ │ Provider Name │ Provider Version │ CDKTF │ Constraint │ Package Name │ Package Version │ ├───────────────┼──────────────────┼─────────┼────────────┼─────────────────────┼─────────────────┤ │ aws │ 5.31.0 │ ^0.19.0 │ │ @cdktf/provider-aws │ 18.2.0 │ ├───────────────┼──────────────────┼─────────┼────────────┼─────────────────────┼─────────────────┤

Gist

No response

Possible Solutions

No response

Workarounds

No response

Anything Else?

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References

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Help Wanted

• [ ] I'm interested in contributing a fix myself

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[ansgarm]

Hi @nitaysol 👋

Could you post what's in your cdk.tf.json in line 44 (and the surrounding lines)? Is there a * in the id of your construct? It might cause this hickup 🤔

Thanks!

[nitaysol]

Thanks for reaching out @ansgarm . No there are no '*' in my construct I've used it in my comment to not use the full name. Line 44(with the surrounding lines): "lifecycle": { "postcondition": [ { "condition": "${jsondecode(aws_lambda_invocation.phau-ca-root-ca-create-root-ca-keys-invoc.result).statusCode} == 200}", "error_message": "error" } ] }

[DanielMSchmidt]

It looks like this error originates from terraform when a condition fails: https://github.com/hashicorp/terraform/blob/3c14eeb94552fc1b61485abeabeefa9b95dcc85e/internal/terraform/eval_conditions.go#L117

[nitaysol]

@DanielMSchmidt - Thanks Daniel I will check it out and leave them a comment then:)

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