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Trying to go from a

Output<InputList<string>>

into a

InputList<string>

The output is coming from a stack reference.

How did you get

Output<InputList<string>>

? It shouldn't be coming from a stack reference like that, so did you do an

.Apply(...)

to it?

Hey Josh, so from that post from yesterday https://pulumi-community.slack.com/archives/CQ2QFLNFL/p1661196667662129 I have that but now I am trying to pass that into another stack. let’s say

dev

. But when I do the apply should it be something like

Apply(x => x)

this give me an error, it does let me do a

Apply(x => x.ToString())

Ok so there is some confusion about how the

Apply(...)

function is meant to be used so checkout this blog post: https://leebriggs.co.uk/blog/2021/05/09/pulumi-apply To be clear,

.Apply(x => x);

is a no-op and doesn't do anything. The delegate that you pass to apply is meant to be used to transform the output of the eventual result, so if you are returning the same output you aren't doing any transformation. If you have an

Output<string> output

and you do

var newOutput = output.Apply(x => x);

than

newOutput

will still be

Output<string>

. However, if you do

var newOutput = output.Apply(x => int.Parse(x))

than you will have converted the

Output<string>

to an

Output<int>

. Note that it is still an output. You cannot get the inner value out of the output. If you have an

Output<string[]>

or an

Output<string>[]

or an

Output<IEnumerable<string>>

, any of these can be implicitly cast to

InputList<string>

without you needing to do anything. Outputs are meant to be able to be passed as inputs out of the box.

That is a good resource, so if I am understanding this correctly, I can do something like

StackRefProdUsers = (InputList<string>)Users

I don't know what

StackRefProdUsers

is or what

Users

is so it is hard to answer that

ahh I see, when dropping this is what I see.

Cannot convert source type 'Pulumi.Output<object?>' to target type 'Pulumi.InputList<string>'

Yea so the stack reference is

Output<object?>

so you need to do an

.Apply(...)

where the delegate does some type checking and transformation until you get something like an

Output<List<string>>

that can be cast to

InputList<string>

Thanks a bunch!