Map within a map in terraform variables

Question

Does anyone know if it's possible with possibly code snipits representing whether I can create a map variable within a map variable in terraform variables?

variable "var" {
  type = map
  default = {
    firstchoice = {
      firstAChoice ="foo"
      firstBChoice = "bar"
    }
    secondchoice = {
      secondAChoice = "foobar"
      secondBChoice = "barfoo"
    }
  }
}

If anyone has any insight to whether this is possible or any documentation that elaborates that would be great.

Answer 1

Yes, it's possible to have map variable as value of map variable key. Your variable just needed right indentation. Also I am putting ways to access that variable.

variable "var" {
  default = {
    firstchoice = {
      firstAChoice = "foo"
      firstBChoice = "bar"
    }

    secondchoice = {
      secondAChoice = "foobar"
      secondBChoice = "barfoo"
    }
  }
}

To access entire map value of a map key firstchoice, you can try following

value = "${var.var["firstchoice"]}"

output:
{
  firstAChoice = foo
  firstBChoice = bar
}

To access specific key of that map key (example firstAChoice), you can try

value = "${lookup(var.var["firstchoice"],"firstAChoice")}"

output: foo