Output complains about missing attribute when it is shurely present

[yurykar]

After switching to new terraform version 0.12.12 we experince some issues, specifically route53 module output seems to be working with errors, it complains about missing attribute, thought the resource created is obviously has name and fqdn attributes.

Terraform Version

0.12.12

Terraform Configuration Files

output "fqdn" {
  description = "List of created non-alias record FQDNs."
  value       = aws_route53_record.record[*].fqdn
}

Expected Behavior

0.12.9

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

alias_record_fqdn = [
  "app-test4.test.io",
]
record_fqdn = [
  "app1.test.io",
]

Actual Behavior

0.12.12

Error: Unsupported attribute

  on ../../resource_modules/route53_record/outputs.tf line 3, in output "fqdn":
   3:   value       = aws_route53_record.record[*].fqdn

This object does not have an attribute named "fqdn".

Additional Context

when use without .fqdn the output is expected

output "fqdn" {
 description = "List of created non-alias record FQDNs."
 value       = aws_route53_record.record[*]
}

Apply complete! Resources: 0 added, 0 changed, 0 destroyed.

Outputs:

alias_record_fqdn = [
  {
    "app-test4.test.io" = {
      "alias" = [
        {
          "evaluate_target_health" = false
          "name" = "xxx"
          "zone_id" = "xxx"
        },
      ]
      "failover_routing_policy" = []
      "fqdn" = "app-test4.test.io"
      "geolocation_routing_policy" = []
      "health_check_id" = ""
      "id" = "xxx"
      "latency_routing_policy" = []
      "name" = "xxx"
      "records" = []
      "set_identifier" = ""
      "ttl" = 0
      "type" = "A"
      "weighted_routing_policy" = []
      "zone_id" = "xxx"
    }
  },
]
record_fqdn = [
  {
    "app1.test.io" = {
      "alias" = []
      "failover_routing_policy" = []
      "fqdn" = "app1.test.io"
      "geolocation_routing_policy" = []
      "health_check_id" = ""
      "id" = "xxx"
      "latency_routing_policy" = []
      "name" = "xxx"
      "records" = [
        "xxx",
      ]
      "set_identifier" = ""
      "ttl" = 3600
      "type" = "CNAME"
      "weighted_routing_policy" = []
      "zone_id" = "xxx"
    }
  },
]

[pselle]

The issue is that you're using a splat operator to refer to try and get something out of a map, but splat has wrapped that map in a list. More details at #22476. The short answer is that if you were to modify your code to values(aws_route53_record.record)[*].fqdn it will work as you're expecting it to.

I suggest reading through the linked issue for more insight as to why this happens, and that the splat operator operates on lists, or it will wrap anything not a list into one, as a matter of convenience.

[ghost]

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