fix: Fixed bug when custom_error_response is empty (#91)

Author: antonbabenko

examples/complete/main.tf

@@ -140,10 +140,13 @@ module "cloudfront" {
     ssl_support_method  = "sni-only"
   }
 
-  custom_error_response = {
+  custom_error_response = [{
     error_code         = 404
     response_page_path = "/errors/404.html"
-  }
+    }, {
+    error_code         = 403
+    response_page_path = "/errors/403.html"
+  }]
 
   geo_restriction = {
     restriction_type = "whitelist"

main.tf

@@ -246,7 +246,7 @@ resource "aws_cloudfront_distribution" "this" {
   }
 
   dynamic "custom_error_response" {
-    for_each = flatten([var.custom_error_response])
+    for_each = length(flatten([var.custom_error_response])[0]) > 0 ? flatten([var.custom_error_response]) : []
 
     content {
       error_code = custom_error_response.value["error_code"]