Azure Event Grid Subscription: advanced filters

Terraform Providers Azure
1

Hi!

I am trying to find a way to apply advanced filters to event subscription. I need to create 3 event subscription for that I have used for each and for advanced filter I have used nested dynamic block. below is my code snippet.

resource "azurerm_eventgrid_system_topic_event_subscription" "subscription" {
      for_each             = var.event_sub_name
      name                 = each.key
      system_topic         = each.value.system_topic
      resource_group_name  = "test-grp"
      event_delivery_schema = "EventGridSchema"
      advanced_filtering_on_arrays_enabled = true
      service_bus_queue_endpoint_id = try(each.value.service_bus_queue_endpoint_id, null)
      included_event_types =  each.value.included_event_types
      dynamic "advanced_filter" {
        #for_each = length(try(var.event_sub_name[1].advanced_filter[0], [])) != 0 ? [var.event_sub_name[1].advanced_filter] : []
        for_each = var.event_sub_name[each.key].advanced_filter != null ? ["advanced_filter"] : []
        
        content {
              dynamic "string_contains" {
                #for_each = lookup(var.event_sub_name[each.key].advanced_filter, "string_contains", {}) != {} ? ["string_contains"] : []
                for_each = lookup(var.event_sub_name[each.key].advanced_filter, "string_contains", {}) != {} ? ["string_contains"] : []
                content {
                  key    = lookup(var.event_sub_name.advanced_filter, "string_contains.key", null)
                  values = lookup(var.event_sub_name.advanced_filters, "string_contains.values", null)
                }
              }
            }
        }

I have passed values in yml file as mentioned below:

event_subscription:
  event_sub: 
      "test-evt":
        system_topic : "systemtopic2"
        service_bus_queue_endpoint_id : "/subscriptions/subscription_id/resourceGroups/test-grp/providers/Microsoft.ServiceBus/namespaces/cru-sub/queues/crudocroutinginboundqueuedev"
        storage_queue_endpoint : null
        included_event_types : ["Microsoft.Storage.BlobCreated", "Microsoft.Storage.BlobDeleted" ]
        retry_policy : [
           {
            "event_time_to_live": "1000",
            "max_delivery_attempts": "3"
           }
         ]
        advanced_filter: 
            {
              "string_contains" : {
                key  : "subject",
                values : ["scan-poor"]
              }
            }

I am getting below error:

Error: Unsupported attribute
│
│   on .terraform\modules\event_subscription\eventgrid.tf line 46, in resource "azurerm_eventgrid_system_topic_event_subscription" "subscription":
│   46:                   values = lookup(var.event_sub_name.advanced_filters, "string_contains.values", null)
│     ├────────────────
│     │ var.event_sub_name is object with 3 attributes
│
│ This object does not have an attribute named "advanced_filters".