Hi Everyone. I have a newbie question that I've been stuck on for longer than I care to admin. Working in a dotnet project, I want to create a bucket and then immediately inject the name of this newly created bucket into an ECS Task Definition. Can someone assist with this? I figured the following would work but it doesn't. I also tried

bucket.Apply(b=>b.BucketName)

and

bucket.BucketName.Apply(v => v)

but neither work. Am I going about this horribly wrong? Thanks in advance.

using System.Collections.Generic;
using Pulumi;
using Aws = Pulumi.Aws;

return await Deployment.RunAsync(() => 
{
    var bucket = new Aws.S3.Bucket($"bucket", new()
    {
        Versioning = new BucketVersioningArgs { Enabled = true },
    });

    var test = new Aws.Ecs.TaskDefinition("test", new()
    {
        Family="family",
        ContainerDefinitions = $@"[{{
            ...
            ""environment"": [{{
                ""name"": ""BUCKETNAME"", 
                ""value"": ""{{bucket.BucketName}}""
            }}],
            ...
        }}]"
    });
});

you need to use

bucket.BucketName.Apply(name => JSON STRING HERE)

That doesn't seem to work as expected.. I'm getting something along the lines of this as my value ...

"value":"Calling [ToString] on an [Output<T>] is not supported.\n\nTo get the value of an Output<T> as an Output<string> consider:\n1. o.Apply(v => $\"prefix{v}suffix\")\n2. Output.Format($\"prefix{hostname}suffix\");\n\nSee <https://pulumi.io/help/outputs> for more details.\nThis function may throw in a future version of Pulumi."}]

please share what you have

I got it figured out actually.. what I did was something like ...

string bucketName;

ah you should not do it like that.

bucket.BucketName

is an

Output<string>

which is sort of like a task or promise - it represents a value that does not necessarily exist yet. you cannot use an

Output<string>

of a value that does not exist (but may exist in the future) to create a

string

value that you want "now" so you setting

ContainerDefinitions = someString

will not work as you are seeing luckily, pulumi lets you easily chain and combine Outputs to create other Outputs.

ContainerDefinitions

is an

Input<string>

which allows you to pass in a

string

(for convenience), or

Input<string>

or an

Output<string>

essentially in your first example you are trying to do something like this: (putting it in 2 separate statements to show what types you are working with)

string containerDefs = $@"[ ... ]";
ContainerDefinitions = containerDefs

there is no (good) way to take an Output<string> like bucket.BucketName and get it to appear somewhere in that

string containerDefs

what you want to do instead is something like

Output<string> containerDefs = ... something
ContainerDefinitions = containerDefs

and to do that, you have a few options.

Apply

is one way like @billowy-army-68599 mentioned:

Output<string> containerDefs = bucket.BucketName.Apply(x =>
{
   // here, x is a string you can use normally
   return $"some string with {x} inside";
});
ContainerDefinitions = containerDefs

you can also use the convenience helper method Output.Format

Output<string> containerDefs = Output.Format($"some string using {bucket.BucketName} inside");
ContainerDefinitions = containerDefs

Output.Format takes in a formattable string and does the Apply for you behind the scenes