Attribute of custom module not available in terraform - terraform

Question

I have created locally a custom module that just replicates the vault_identity_entity official module.
Here it is more or less
resource "vault_identity_entity" "this" {
name = var.name
policies = var.policies
metadata = var.metadata
disabled = var.disabled
external_policies = var.external_policies
}
In the corresponding outputs.tf file, I have this
output "entity" {
description = "The entity created"
value = vault_identity_entity.this
}
I am now trying to retrieve its id attribute as follows
module "identities_memberships" {
source = "../../../../path/to/identity_group_member_entity_ids"
for_each = {
for item in local.memberships: item.member_email => {
group = item.group
}
}
member_entity_ids = [module.identity_entities[each.key].id]
group_id = module.identity_groups[each.value.group].id
}
This fails as follows:
│ Error: Unsupported attribute
│
│ on main.tf line 101, in module "identities_memberships":
│ 101: member_entity_ids = module.identity_entities[each.key].id
│ ├────────────────
│ │ each.key is a string
│ │ module.identity_entities is a map of object
│
│ This object does not have an attribute named "id".
The vaule of local_memberships as printed when I set it in the outputs
+ local_memberships = [
+ {
+ group_name = "admins"
+ member_email = "john#gmail.com.com"
},
+ {
+ group_name = "admins"
+ member_email = "maria#gmail.com"
},
+ {
+ group_name = "operators"
+ member_email = "maria#gmail.com.com"
},
+ {
+ group_name = "viewers"
+ member_email = "adam#gmail.com.com"
},
]
and the module.identity_identities is the instantiation of the above module
module "identity_entities" {
source = "../../../../path/to/identity_entity"
for_each = local.member_groups
name = each.key
depends_on = [
module.identity_groups
]
}
where local.member_groups:
+ local_member_groups = {
+ "adam#gmail.com.com" = [
+ "viewers",
]
+ "john#gmail.com.com" = [
+ "admins",
]
+ "maria#gmail.com" = [
+ "admins",
]
+ "maria#gmail.com.com" = [
+ "operators",
]
}
Why can't I access the id attribute? What am I missing?
If I comment out the section that produces the error, the plan shows me it will create for example (among others) this:
# module.identity_entities["john#gmail.com"].vault_identity_entity.this will be created
+ resource "vault_identity_entity" "this" {
+ disabled = false
+ external_policies = false
+ id = (known after apply)
+ name = "john#gmail.com"
}
However when also hardcoding values as follows
module "identities_memberships" {
source = "../../../../modules-terraform/vault/identity_group_member_entity_ids"
for_each = {
for item in local.memberships : item.member_email => {
group = item.group
}
}
member_entity_ids = [module.identity_entities["john#gmail.com"].id]
group_id = module.identity_groups["admins"].id
depends_on = [
module.identity_entities
]
}
same error, (now for the other module as well)
│
│ on main.tf line 101, in module "identities_memberships":
│ 101: member_entity_ids = [module.identity_entities["john#gmail.com"].id]
│ ├────────────────
│ │ module.identity_entities["john#gmail.com"] is a object
│
│ This object does not have an attribute named "id".
╵
╷
│ Error: Unsupported attribute
│
│ on main.tf line 102, in module "identities_memberships":
│ 102: group_id = module.identity_groups["admins"].id
│ ├────────────────
│ │ module.identity_groups["admins"] is a object
│

Answer 1

To access id of the entity, you have to:
module.identity_entities["john#gmail.com"].entity.id