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Description
Description
When trying to use a lifecycle rule while passing null values for transition, noncurrent_version_transition and filter inputs, Terraform throws a "null value has no attributes" error. I believe this is due to how the for_each blocks are implemented:
for_each = try(flatten([rule.value.expiration]), [])
Since there is no compact, the flatten call will return [null] which is a valid list with one value.
In my case the null values are coming from a variable with optional fields, so it would be best if the module could handle null values correctly.
- ✋ I have searched the open/closed issues and my issue is not listed.
Versions
-
Module version [Required]: 4.5.0
-
Terraform version: 1.7.5
- Provider version(s): 5.84.0
Reproduction Code [Required]
module "s3_bucket" {
source = "terraform-aws-modules/s3-bucket/aws"
bucket = "tftest-foobar-bucket"
lifecycle_rule = [
{
id = "foobar"
enabled = true
expiration = null
transition = null
noncurrent_version_expiration = null
noncurrent_version_transition = null
filter = {
tags = null
}
}
]
}Steps to reproduce the behavior:
- run
terraform plan
Expected behavior
The plan to create a bucket with an empty lifecycle rule.
Actual behavior
Error:
│ Error: Attempt to get attribute from null value
│
│ on .terraform/modules/s3_bucket/main.tf line 281, in resource "aws_s3_bucket_lifecycle_configuration" "this":
│ 281: storage_class = transition.value.storage_class
│ ├────────────────
│ │ transition.value is null
│
│ This value is null, so it does not have any attributes.
╵
╷
│ Error: Attempt to get attribute from null value
│
│ on .terraform/modules/s3_bucket/main.tf line 302, in resource "aws_s3_bucket_lifecycle_configuration" "this":
│ 302: storage_class = noncurrent_version_transition.value.storage_class
│ ├────────────────
│ │ noncurrent_version_transition.value is null
│
│ This value is null, so it does not have any attributes.
╵
╷
│ Error: Invalid function argument
│
│ on .terraform/modules/s3_bucket/main.tf line 317, in resource "aws_s3_bucket_lifecycle_configuration" "this":
│ 317: for_each = [for v in try(flatten([rule.value.filter]), []) : v if max(length(keys(v)), length(try(rule.value.filter.tags, rule.value.filter.tag, []))) == 1]
│
│ Invalid value for "inputMap" parameter: argument must not be null.
╵
╷
│ Error: Invalid function argument
│
│ on .terraform/modules/s3_bucket/main.tf line 337, in resource "aws_s3_bucket_lifecycle_configuration" "this":
│ 337: for_each = [for v in try(flatten([rule.value.filter]), []) : v if max(length(keys(v)), length(try(rule.value.filter.tags, rule.value.filter.tag, []))) > 1]
│
│ Invalid value for "inputMap" parameter: argument must not be null.
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