expressions.tf

# Type declaration
variable "users" {
  type = map(object({
    role = string
  }))
  default = {
    "mike" = { "role" = "admin" }
    "steve" = { "role" = "user" }
    "joe" = { "role" = "admin" }
  }
}

# Type inferred
variable "items" {
  default = {
    "mike" = { "role" = "admin" }
    "steve" = { "role" = "user" }
    "joe" = { "role" = "admin" }
  }
}

locals {
  # Group values by chosen key
  users_by_role = {
    for name, user in var.users : user.role => name...
  }
  # Conditionally choose elements returned as objects
  admin_users = {
    for name, user in var.users : name => user if user.role == "admin"
  }
  # Conditionally choose elements returns as tuple
  regular_users = [
    for name, user in var.users : name if user.role == "user"
  ]
}