Hey, slight challenge getting the actual

string

from `vpc.ID()`:

package main

import (
	ec2Classic "<http://github.com/pulumi/pulumi-aws/sdk/v5/go/aws/ec2|github.com/pulumi/pulumi-aws/sdk/v5/go/aws/ec2>"
	"<http://github.com/pulumi/pulumi/sdk/v3/go/pulumi|github.com/pulumi/pulumi/sdk/v3/go/pulumi>"
)

func main() {
	vpc, err := ec2Classic.NewVpc(ctx, "vpc", &ec2Classic.VpcArgs{
		CidrBlock:          pulumi.String(cidrRange),
		EnableDnsHostnames: pulumi.Bool(true),
		EnableDnsSupport:   pulumi.Bool(true),
	}, opts...)
	if err != nil {
		return nil, err
	}
	ctx.Export("vpc", vpc)

	rt, err := ec2Classic.LookupRouteTable(ctx, &ec2Classic.LookupRouteTableArgs{
		// VpcId: pulumi.StringRef(fmt.Sprintf("%s", vpc.ID())),
		Filters: []ec2Classic.GetRouteTableFilter{
			{
				Name:   "vpc-id",
				Values: []string{"vpc-0497cc4ca5e669e0c"}, // how do I get the actual string value from vpc.ID()??
			},
			{
				Name:   "association.main",
				Values: []string{"true"},
			},
		},
	})
}

The type of

vpc.ID()

is

IDOutput

, a kind of Pulumi output, which means it can’t just be cast as a string, because its value is computed during the deployment (so it can’t be supplied to the lookup function as a “prompt” value). You can however obtain and use the computed string by converting the ID output to a string output, then doing the lookup in the string output’s

.Apply()

--

Perfect! Thank you, I wouldn't have thought of using ApplyT at all ...

Awesome, you bet!