Is for_each Meta-Argument not the same as for_each in a Dynamic Block?

Terraform
1

Hello :slight_smile:

I was able to make a dynamic block for the additional disks. As the iterator I used a list of strings and it worked just fine, no errors. Here the code snippet from that:

variable "additional_disks" {
  type = list(string)
}

dynamic "disk" {
  for_each = var.additional_disks

  content {
	label       = "disk${sum([index(var.additional_disks, disk.value), 1])}"
	size        = disk.value
	unit_number = sum([index(var.additional_disks, disk.value), 1])
  }
}

Now what I wanna do is the same thing but instead of Dynamic Blocks I wanna use just the Meta-Argument for_each in a Data Block and here the same solution doesn’t work. Here my current code that throws an error:

variable  "vm_network_interface" {
  type = list(string)
}

data "vsphere_network" "network" {
  for_each = var.vm_network_interface
  
  name          = each.value
  datacenter_id = data.vsphere_datacenter.dc.id
}

The error I get is the following:

│ Error: Invalid for_each argument
│
│   on data.tf line 16, in data "vsphere_network" "network":
│   16:   for_each = var.vm_network_interface
│     ├────────────────
│     │ var.vm_network_interface is list of string with 2 elements
│
│ The given "for_each" argument value is unsuitable: the "for_each" argument must be a map, or set of strings, and you
│ have provided a value of type list of string.

Anyone have any experience with this? I know the workaround is just to use a map or a set but I am just confused why one works but the other doesnt. is for_each not equals for_each here?