fix: Ensure database route table output works (terraform-aws-modules#926)

* fix: ensure database route table output works On initial plan the `database_route_table_ids` output is not available due to the values not being known until after apply. Switching the logic to test the length of the array fixes this issue. Credit to @martin566 for discovering the solution. fixes terraform-aws-modules#857 * Update outputs.tf * Update outputs.tf --------- Co-authored-by: Bryant Biggs <bryantbiggs@gmail.com>

Author: henworth

outputs.tf

@@ -279,7 +279,8 @@ output "database_subnet_group_name" {
 
 output "database_route_table_ids" {
  description = "List of IDs of database route tables"
- value = try(coalescelist(aws_route_table.database[*].id, local.private_route_table_ids), [])
+ # Refer to https://github.com/terraform-aws-modules/terraform-aws-vpc/pull/926 before changing logic
+ value = length(aws_route_table.database[*].id) > 0 ? aws_route_table.database[*].id : aws_route_table.private[*].id
 }
 
 output "database_internet_gateway_route_id" {