constructing reference call with for_each in line

Question

Whats going on?

• I have created a couple of "google_compute_health_check" on GCP
• To re-use the health checks, my variables refer to whatever health_check they need
• I am now creating another resource that needs to refer to this health check

health-check.tf

resource "google_compute_health_check" "tcp-8008-hc" {
  name = "tcp-8008-hc"

  timeout_sec        = 5
  check_interval_sec = 5

  http_health_check {
    port         = "8008"
    request_path = "/"
  }
}

resource "google_compute_health_check" "tcp-80-hc" {
  name = "tcp-80-hc"

  timeout_sec        = 5
  check_interval_sec = 5

  http_health_check {
    port         = "80"
    request_path = "/"
  }
}

variables.tf

variable "applications" {
  default = {
    "app1" = {
      //.....(snipped)...
      health_check = "tcp-8008-hc"
      //.....(snipped)...
    },
    "app2" = {
      //.....(snipped)...
      health_check = "tcp-80-hc"
      //.....(snipped)...
    },
    "app3" = {
      //.....(snipped)...
      health_check = "tcp-8008-hc"
      //.....(snipped)...
    },
  }
}

main.tf

In this main.tf, I am creating another resource which needs to refer to the health-check based on the value of "health_check" variable of the current loop. I am not sure how do I do that with "each"?

resource "google_compute_backend_service" "backend" {
  //.....(snipped)...
  for_each = var.applications
  health_checks = [google_compute_health_check.each.value["health_check"].id]

}