All Module Outputs Typed as String

[skorfmann]

Community Note

• Please vote on this issue by adding a 👍 reaction to the original issue to help the community and maintainers prioritize this request
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request
• If you are interested in working on this issue or have submitted a pull request, please leave a comment

cdktf & Language Versions

• ALL

Affected Resource(s)

• Modules

Debug Output

E.g the AWS VPC Module:

public get publicSubnetsOutput(): string {
    return this.interpolationForOutput('public_subnets')
  }

Expected Behavior

This should be treated as list of strings

Actual Behavior

It's treated as simple string

Steps to Reproduce

Import VPC module and reference the output

[orendain]

In the meantime, are there workarounds that are expected to work?

@jsteinich wrote in #606:

You could try using Token.asList on the module output to workaround.

In my case, I have an output that should be recognized as an object w/ a couple of attributes. I'm struggling to have it recognized as such. Using Token().as_any will still result in AttributeError: '<class 'cdktf._IResolvableProxy'>' object has no attribute 'my_attribute' when synthesizing.

[jsteinich]

In my case, I have an output that should be recognized as an object w/ a couple of attributes. I'm struggling to have it recognized as such. Using Token().as_any will still result in AttributeError: '<class 'cdktf._IResolvableProxy'>' object has no attribute 'my_attribute' when synthesizing.

You could manually construct hcl and use escape hatches, but probably easier to try to use Fn.lookup. Should just be able to pass the output directly, the name of the attribute, and a default value to the function.

[c0deaddict]

I also encounter this bug using Python with the CDKTF and the VPC module. Is there any known workaround for Python? I tried typing.cast(list[str], self.vpc.private_subnet_outputs) but that doesn't change anything.

Update Found it! Token.as_list(self.vpc.private_subnet_outputs) seems to work

[josh-thisisbud]

This sort of thing needs to be documented.

[starbuggx]

Token.as_list is working with a list from _output, but when I tried to get a target group arn from target_groups_output, the original output is string, but after I tried Token.as_list, Token.as_string_map(dict), I still cannot get the arn.