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a

adorable-alligator-23779

03/22/2021, 10:21 PM
How do i convert a `pulumi.StringPtrOutpu`` to a string or a normal pointer in go, feels like i am missing something. I want to get the name of the created service with `service, err := corev1.NewService(ctx, svcName, &corev1.ServiceArgs...``
l

little-cartoon-10569

03/22/2021, 10:29 PM
You can access it only from within an 
Apply
function. Often, you don't need to, as you can pass the StringPtrOutput into Pulumi resource constructors without resolving the StringPtr inside it.
What do want to do with the name of the service?
a

adorable-alligator-23779

03/22/2021, 10:32 PM
use as ingress backend
im creating a service, and then i want to create a ingress that references the service just created
so i need the servicename
l

little-cartoon-10569

03/22/2021, 10:32 PM
So the name of the service is being passed to the constructor of another Pulumi resource?
a

adorable-alligator-23779

03/22/2021, 10:33 PM
correct
ing, err := networkingv1.NewIngress(ctx, svcName, &networkingv1.IngressArgs{
		Spec: &networkingv1.IngressSpecArgs{
			Rules: &networkingv1.IngressRuleArray{
				&networkingv1.IngressRuleArgs{
					Host: pulumi.String("<http://test.roffe.nu|test.roffe.nu>"),
					Http: &networkingv1.HTTPIngressRuleValueArgs{
						Paths: &networkingv1.HTTPIngressPathArray{
							&networkingv1.HTTPIngressPathArgs{
								Backend: &networkingv1.IngressBackendArgs{
									Service: &networkingv1.IngressServiceBackendArgs{
										Name: svcName,
										Port: &networkingv1.ServiceBackendPortArgs{
											Number: <http://pulumi.Int|pulumi.Int>(port),
										},
									},
								},
							},
						},
					},
				},
			},
		},
	})
l

little-cartoon-10569

03/22/2021, 10:33 PM
Then don't get the StringPtr. Use the StringPtrOutput as-is.
a

adorable-alligator-23779

03/22/2021, 10:33 PM
but it’s complaining
cannot use service.Metadata.Name() (value of type pulumi.StringPtrOutput) as pulumi.StringInput value in argument to createIngress: missing method ToStringOutput
if _, err := createIngress(ctx, svc.Name, service.Metadata.Name(), t.Port); err != nil {
				return err
			}
service
is a *corev1.Service
and the backend does not take a pointer it seems
cannot use backendName (variable of type pulumi.StringPtrInput) as pulumi.StringInput value in struct literal: missing method ToStringOutput
must be a `pulumi.StringInput`so i need to get the value of it xD
l

little-cartoon-10569

03/22/2021, 10:37 PM
Usually Pulumi looks after that. You can't get the value, since it's not known yet. What resource type is NewService creating? Something in Azure or GCP?
a

adorable-alligator-23779

03/22/2021, 10:38 PM
neither
Kubernetes
here is the relevant code
here: https://play.golang.org/p/WHRtbDGEen3
line 36 is where it does not accept the stringptroutput i get from the service creation
which needs to be just a string
and it must be the name of the service i just created
l

little-cartoon-10569

03/22/2021, 10:40 PM
I see that line 78 is getting the name. Is 
service.Metadata.Elem().Name()
different to what you need?
a

adorable-alligator-23779

03/22/2021, 10:41 PM
does not work
same shit
it returns a StringPtrOutput that i need to get as a string
the ctx.Export resolves it and prints it yes, but i need it as a string 🙂
it seems 
backendName.ToStringPtrOutput().Elem()
might work
atleast it’s not complaining about types now
l

little-cartoon-10569

03/22/2021, 10:44 PM
Ah good. Generally, you don't need a string. You can't get at a string, most of the time. You need to provide the Output (StringOutput or StringPtrOutput) to something that knows how to handle it.
There are a few exceptions, such as when you create a new output string from an old one (often used when building AWS ARNs, for example). But most of the time, you just hang on to the Output object and pass that into the next Pulumi resource you're creating.
w

white-balloon-205

03/23/2021, 12:22 AM
it seems 
backendName.ToStringPtrOutput().Elem()
might work Yes - if you want to convert a 
StringPtrOutput
to a 
StringOutput
you can use 
.Elem()
which is the equivalent of de-referencing with 
*
on a plain value. Elem is just a shorthand for an Apply that de references the pointer value of the output (if/when it becomes available). A 
StringOutput
can then be passed anywhere a 
StringInput
is expected.
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