### Terraform Version ```shell v1.12.0-dev (8865218ccb584267a558b4d0c6f0c14a2d1aefd0) ``` ### Terraform Configuration Files ```terraform terraform { required_providers { restful = { source = "magodo/restful" } } } provider "restful" { base_url = "http://local:3000" } ephemeral "restful_resource" "test" { path = "/ephemerals" method = "POST" renew_path = "/ephemerals/$(body.id)" renew_method = "PATCH" renew_body = { renew = 1 } expiry_type = "duration" expiry_locator = "exact.1s" close_path = "/ephemerals/$(body.id)" close_method = "DELETE" } resource "restful_resource" "test" { path = "/resources" read_path = "/resources/$(body.id)" body = { foo = "bar" } ephemeral_body = { secret = ephemeral.restful_resource.test.output.id } } ``` ### Debug Output ``` ╷ │ Error: Invalid use of ephemeral value │ │ with restful_resource.test, │ on main.tf line 30, in resource "restful_resource" "test": │ 30: resource "restful_resource" "test" { │ │ Ephemeral values are not valid for "ephemeral_body.secret", because it is not an assignable │ attribute. ╵ ``` ### Expected Behavior Terraform should accept this config as `ephemeral_body` is marked as `WriteOnly: true`, albeit it is of dynamic type. ### Actual Behavior `terraform validate` failed with error: ``` ╷ │ Error: Invalid use of ephemeral value │ │ with restful_resource.test, │ on main.tf line 30, in resource "restful_resource" "test": │ 30: resource "restful_resource" "test" { │ │ Ephemeral values are not valid for "ephemeral_body.secret", because it is not an assignable │ attribute. ╵ ``` ### Steps to Reproduce 1. Checkout and build the `magodo/terraform-provider-restful` at branch: https://github.com/magodo/terraform-provider-restful/tree/ephemeral_body 2. Instruct terraform to use the locally built provider via modifying the `.terraformrc` 3. `terraform validate` with the config above ### Additional Context Since the write-only attribute support [PR](https://github.com/hashicorp/terraform-plugin-framework/pull/1044) is merged in FW recently, I'm trying to support that in my [restful provider](https://github.com/magodo/terraform-provider-restful/tree/ephemeral_body). The provider offers a general resource `restful_resource`, whose `body` is defined as a dynamic value. For the same reason, I've introduced a new optional attribute `ephemeral_body` which has the `WriteOnly: true`, and is also a dynamic value. I expect as long the `ephemeral_body` is marked as write-only, then it can reference a ephemeral value. However, it turns out I can only directly assign an ephemeral value to `ephemeral_body`, but can't assign it to a nested field. I find the error is raised from Terraform, therefore submitting the issue here. ### References _No response_ ### Generative AI / LLM assisted development? _No response_