nested Set does not detect updates to elements, only recreation

[khumps]

SDK version

github.com/hashicorp/terraform-plugin-sdk/v2 v2.7.0

Relevant provider source code

		Schema: map[string]*schema.Schema{
			"user": {
				Type: schema.TypeSet,
				Elem: resourceDoorUser(),
				Set: func(i interface{}) int {
					m := i.(map[string]interface{})
					token := m["token"].(string)
					return schema.HashString(token)
				},
				Required: true,
			},
		},
                 // resourceDoorUser() schema
		Schema: map[string]*schema.Schema{
			"token": {
				Type:     schema.TypeString,
				Computed: true,
			},
			"first_name": {
				Type:     schema.TypeString,
				Required: true,
			},
			"last_name": {
				Type:     schema.TypeString,
				Required: true,
			},
			"credential": {
				Type:     schema.TypeSet,
				Elem:     resourceDoorCredential(),
				Optional: true,
			},
		},
                 // resourceDoorCredential() schema
		Schema: map[string]*schema.Schema{
			"token": {
				Type:     schema.TypeString,
				Computed: true,
			},
			"profile_token": { // TODO this should support a set of profiles, not just a single one
				Type:     schema.TypeString,
				Required: true,
			},
			"pin": {
				Type:     schema.TypeString,
				Required: true,
			},
		}

Terraform Configuration Files

resource "axis_door_users" "test" {
  user {
	first_name = "Test"
	last_name = "User"
	credential {
	  profile_token = data.axis_door_profile.test.id //defined elsewhere
	  pin = "1234"
	}
  }

}

Debug Output

https://gist.github.com/khumps/20e7510f20089c677aa64c248f6c0dd8

Expected Behavior

If I change something about a user such as first/last name or profile_token or pin from credential it should show up in the plan as a change to the sub-block

Actual Behavior

A full deletion of the sub-block followed by a creation of an identical one with the changes

Steps to Reproduce

terraform apply followed by another terraform apply with a small change

[vadim-su]

I faced with same problem recently. What is temporary resolve do you use?

[BorisMikhailovski]

I have similiar problem with TypeSet, when trying to remove single member left in TypeSet, TF (SDK) fails to recognise last member removal

The current solution is to work with TypeList, yet there will be always chance that order will change