terraform set domain record according to domain mapping

main.tf

# Domain mapping
resource "google_cloud_run_domain_mapping" "default" {
  location = "us-east1"
  name     = var.domain

  metadata {
    namespace = var.projectId
  }

  spec {
    route_name = google_cloud_run_service.app.name
  }
}
resource "google_dns_managed_zone" "default" {
  name       = "devresources"
  dns_name   = var.domain
  visibility = "public"
}

locals {
  dns_records = {
    "A" = [
      for rr in google_cloud_run_domain_mapping.default.resource_records :
      rr.rrdata if rr.type == "A"
    ]
    "AAAA" = [
      for rr in google_cloud_run_domain_mapping.default.resource_records :
      rr.rrdata if rr.type == "AAAA"
    ]
  }
}

resource "google_dns_record_set" "default" {
  for_each = local.dns_records

  managed_zone = google_dns_managed_zone.default.name

  name    = var.domain
  type    = each.key
  ttl     = 3600
  rrdatas = each.value
}