Terraform Complex Type Variables

List

list(string)	The values in the list are of type “string.”
list(number)	The values in the list are of type “number” (integer or floating-point).
list(bool)	The values in the list are of type “bool” (true or false).
list(list)	The values in the list are lists (arrays) containing elements of the same type.
list(set)	The values in the list are sets containing unique elements of the same type.
list(object({ … }))	The values in the list are objects (complex data structures) that must conform to a specific structure defined by the object’s attributes.

Map

map(string)	The values in the map are of type “string.”
map(number)	The values in the map are of type “number” (integer or floating-point).
map(bool)	The values in the map are of type “bool” (true or false).
map(list)	The values in the map are lists (arrays) containing elements of the same type.
map(set)	The values in the map are sets containing unique elements of the same type.
map(object({ … }))	The values in the map are objects (complex data structures) that must conform to a specific structure defined by the object’s attributes.

List of Objects

# Declaration
variable "userlist" {
  type = list(object({
    id = string
    name = string
    city = string
  }))
}

# Example
userlist = [
    {
        id = "1"
        name = "john"
        city = "newyork"
    },
    {
        id = "2"
        name = "jane"
        city = "california"
    },
]

Map of Objects

# Declaration
variable "mapofobjects" {
  type = map(object({
    name = string
    age = number
    city = string
    vaccinated = bool
  }))
  
}

# Example
# Example
mapofobjects = {
    user1 = {
      name = "John"
      age = 32
      city = "New York"
      vaccinated = true
    }
    user2 = {
      name = "Jane"
      age = 31
      city = "San Jose"
      vaccinated = false
    }
    user3 = {
      name = "Mary"
      age = 30
      city = "San Francisco"
      vaccinated = true
    }
  }

# Output
output "mapofobjects" {
    value = [for user in var.mapofobjects : user ]
}