Terraform genesyscloud provider: for_each with YAML variables fails on queue creation

I’m completely stumped as to why my for_each loop fails when creating queues from a YAML file using the genesyscloud provider. I get a state drift error immediately.

Error: Invalid for_each argument. A value on the left side of for_each must be a map or set of strings.

My environment:

• Terraform 1.5.7
• genesyscloud provider 1.20.0
• Python 3.10 for YAML parsing

Here is the snippet:

resource "genesyscloud_routing_queue" "this" {
 for_each = var.queues
 name = each.value.name
}

The YAML output is a list of objects, not a map. How do I convert it?

Cause: YAML parsing often returns lists or complex objects, not the flat map required by for_each.

Solution: Convert the parsed structure explicitly.

locals {
 queue_map = { for q in yaml_queue_list : q.name => q }
}

resource "genesyscloud_routing_queue" "q" {
 for_each = local.queue_map
}

The main issue here is that for_each requires a map or set, but your YAML parser likely returns a list of objects.

1. Define a local variable to convert the list to a map keyed by a unique identifier like name.
2. Use that local map in the for_each attribute of the genesyscloud_routing_queue resource.

locals {
 queue_map = { for q in var.queue_list : q.name => q }
}

resource "genesyscloud_routing_queue" "this" {
 for_each = local.queue_map
 name = each.value.name
}