import * as aws from "@pulumi/aws";

const cachingOptimizedPolicy = aws.cloudfront.getCachePolicyOutput({
  name: "Managed-CachingOptimized",
});

const distribution = new aws.cloudfront.Distribution("distribution", {
  orderedCacheBehaviors: [
    {
      cachePolicyId: cachingOptimizedPolicy.id,
      ...
    }
  ],
  ...
});

This code has a type error.

cachingOptimizedPolicy.id

is of type

Output<string | undefined>

but

cachePolicyId

expects something of type

string

. I had a similar code with Terraform but didn't have any issue.

This might be a typing bug in the SDK. I'm not sure if getCachePolicyOutput actually always sets the

id

value in the result, and if it doesn't then it coming back as

string | undefined

is accurate and you should handle that (maybe by just casing to

string

if you know that in your case it does always get set). If it always sets id then we should fix up the type for that. If you just want to cast it you can do

cachingOptimizedPolicy.id.apply(id => id!)

to tell TS to ignore the undefined part. Might be worth raising an issue at https://github.com/pulumi/pulumi-aws about this, the team that work on this will know better than me if

id

is actually optional or not.

Thanks @echoing-dinner-19531 for your answer! And in the meantime, I will adopt your solution with

.apply(id => id!)

that seems a good workaround.