TFNFR12 - Dynamic for Optional Nested Objects

ID: TFNFR12 - Category: Code Style - Dynamic for Optional Nested Objects

An example from the community:

resource "azurerm_kubernetes_cluster" "main" {
  ...
  dynamic "identity" {
    for_each = var.client_id == "" || var.client_secret == "" ? [1] : []

    content {
      type                      = var.identity_type
      user_assigned_identity_id = var.user_assigned_identity_id
    }
  }
  ...
}

Please refer to the coding style in the example. Nested blocks under conditions, MUST be declared as:

for_each = <condition> ? [<some_item>] : []