fix: missing default values for dynamic block attributes

Add ternary condition to validate `service.load_balancer` for `null` value.

Author: saumitra-dev

main.tf

@@ -58,7 +58,7 @@ resource "aws_ecs_service" "this" {
   wait_for_steady_state              = try(var.service.wait_for_steady_state, null)
 
   dynamic "load_balancer" {
-    for_each = try(var.service.load_balancer, [])
+    for_each = try(var.service.load_balancer != null ? var.service.load_balancer : [], [])
     iterator = load_balancer
 
     content {

variables.tf

@@ -28,12 +28,12 @@ variable "service" {
     scheduling_strategy                = optional(string)
     triggers                           = optional(map(string))
     wait_for_steady_state              = optional(bool)
-    load_balancer                      = optional(any)
-    network_configuration              = optional(any)
-    service_connect_configuration      = optional(any)
-    volume_configuration               = optional(any)
-    deployment_circuit_breaker         = optional(any)
-    service_registries                 = optional(any)
+    load_balancer                      = optional(any, [])
+    network_configuration              = optional(any, null)
+    service_connect_configuration      = optional(any, null)
+    volume_configuration               = optional(any, null)
+    deployment_circuit_breaker         = optional(any, null)
+    service_registries                 = optional(any, null)
     tags                               = optional(map(string), {})
   })
 }
@@ -56,8 +56,8 @@ variable "task_definition" {
     skip_destroy          = optional(bool)
     task_role_arn         = optional(string)
     track_latest          = optional(bool)
-    runtime_platform      = optional(any)
-    volume                = optional(any)
+    runtime_platform      = optional(any, null)
+    volume                = optional(any, null)
     tags                  = optional(map(string), {})
   })
 }