subnet_ids not optional

[jam01]

Description

subnet_ids is declared as optional, but is required per the implementation, leading to an error.

• ✋ I have searched the open/closed issues and my issue is not listed.

Versions

• Module version [Required]:

• Terraform version:
  v1.13.4

• Provider version(s):
  v6.22.0

Reproduction Code [Required]

Not adding subnet_ids

Expected behavior

Create the task-definition

Actual behavior

Error result

Terminal Output Screenshot(s)

│ Error: Error in function call
│ 
│   on .terraform/modules/ecs_job_dbmigration/modules/service/main.tf line 1875, in data "aws_subnet" "this":
│ 1875:   id = element(var.subnet_ids, 0)
│     ├────────────────
│     │ while calling element(list, index)
│     │ var.subnet_ids is empty list of string
│ 
│ Call to function "element" failed: cannot use element function with an
│ empty list.