Move table arn to separate locals

Author: drosin

main.tf

@@ -1,3 +1,7 @@
+locals {
+  dynamodb_table_arn = try(aws_dynamodb_table.this[0].arn, aws_dynamodb_table.autoscaled[0].arn, aws_dynamodb_table.autoscaled_gsi_ignore[0].arn, "")
+}
+
 resource "aws_dynamodb_table" "this" {
   count = var.create_table && !var.autoscaling_enabled ? 1 : 0
 
@@ -380,6 +384,6 @@ resource "aws_dynamodb_table" "autoscaled_gsi_ignore" {
 resource "aws_dynamodb_resource_policy" "this" {
   count = var.create_table && var.resource_policy != null ? 1 : 0
 
-  resource_arn = try(aws_dynamodb_table.this[0].arn, aws_dynamodb_table.autoscaled[0].arn, aws_dynamodb_table.autoscaled_gsi_ignore[0].arn, "")
-  policy       = replace(var.resource_policy, "__DYNAMODB_TABLE_ARN__", try(aws_dynamodb_table.this[0].arn, aws_dynamodb_table.autoscaled[0].arn, aws_dynamodb_table.autoscaled_gsi_ignore[0].arn, ""))
+  resource_arn = local.dynamodb_table_arn
+  policy       = replace(var.resource_policy, "__DYNAMODB_TABLE_ARN__", local.dynamodb_table_arn)
 }

outputs.tf

@@ -1,6 +1,6 @@
 output "dynamodb_table_arn" {
   description = "ARN of the DynamoDB table"
-  value       = try(aws_dynamodb_table.this[0].arn, aws_dynamodb_table.autoscaled[0].arn, aws_dynamodb_table.autoscaled_gsi_ignore[0].arn, "")
+  value       = local.dynamodb_table_arn
 }
 
 output "dynamodb_table_id" {