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# typescript
s
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b
we have the new 
ec2.Vpc.getSubnetsOutput
which might be more helpful in this scenario
m
Ah, doesn't look like it's on my version awsx.Vpc (sorry should've mentioned this is awsx)
b
oh, sorry yes it's not in there yet
and no, you can't pass a promise to an Output, you'll need to await it and then build an output, which won't be fun
m
yeah sounds like bad things will occur 😅
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vpc.id.apply(() => vpc.publicSubnets)
wrap in a relateed output to maintain dependency data, return promise to subnets which should resolve some time after vpc.id
(in my head)
r
What @magnificent-lifeguard-15082 suggested worked as a charm ❤️
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const publicSubnetsIds = vpc.id.apply(async () => vpc.getSubnetsIds("public"));
and then I use it like this:
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const alb = new aws.lb.LoadBalancer(`${name}-alb`, {
      internal: false,
      loadBalancerType: "application",
      securityGroups: [albSecGroup.id],
      subnets: publicSubnetsIds.apply((ids) => ids),
    });
Thanks a bunch, @magnificent-lifeguard-15082!
❤️ 1
e
publicSubnetsIds.apply((ids) => ids),
is the same as just 
publicSubnetsIds
👍 1
r
hmhmh, this confuses me my IDEA says something else:
b
does this not work?
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const alb = new aws.lb.LoadBalancer(`${name}-alb`, {
      internal: false,
      loadBalancerType: "application",
      securityGroups: [albSecGroup.id],
      subnets: publicSubnetsIds
    });
r
Oh, got it - it does 😄
thanks!
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