I’m trying to properly order route53 record creation using

.apply

but it doesn’t work like I would expect:

record = route53.Record(dns_name,
                        name=dns_name,
                        records=[new_instance.private_ip],
                        ttl=60,
                        type="A",
                        zone_id="..."")

dns_name = record.name.apply(lambda n: n)

yields

dns_name

value of

<pulumi.output.Output object at 0x110e60160>

. What am I missing?

apply

transforms an Output into another Output by running a function on the value within that Output.

lambda n: n

is the identity function, so what you get is

record.name

, which is an output. You can’t operate directly with outputs, but you can use

apply

to transform them and you can pass them directly to other resources: https://pulumi.io/reference/programming-model.html#outputs

The example under https://pulumi.io/reference/programming-model.html#apply implies that what I’m doing would work, right? It’s constructing a string from some output. I would like to understand this further, but perhaps there is a better way to indicate a dependency ordering to Pulumi. In this case the dependency is implicit, only magic strings relate these resources.

Yes, but what you linked is not the same as what you’re doing, right?

record.name.apply(lambda n: n)

is a no-op transformation on

record.name

, whereas the thing you linked transforms an output by putting

https://

on the front of it.

If I’m understanding, there is no way for me to get a value out of an Output outside of being part of an Input

That’s correct - that’s part of the design. Do you need the value?

I don’t. Ultimately I need my two dns records created in the proper order. One is a real record and the other is an alias to the first record. There is no hard dependency, and Pulumi is trying to create them out of order and failing on the alias.

If you want to force a dependency, you can use `depends_on`: https://pulumi.io/reference/pkg/python/pulumi/index.html#pulumi.ResourceOptions

It is a dependency within aws, but the Output of one is not an Input to the second within my script.

great, no problem!