[Bug]: aws_lb_target_group name_prefix validation

[nozo-moto]

Terraform Core Version

1.3.3

AWS Provider Version

4.37.0

Affected Resource(s)

• name_prefix of aws_lb_target_group's ValidateFunc.

Expected Behavior

This validation should Ignore variables or consider expansion.

Actual Behavior

This validation is return invalid even if name_prefix has variable.
And If value length exceeded 6, it return invalid.

validation code.

terraform-provider-aws/internal/service/elbv2/validate.go

Lines 82 to 98 in a72a7ff

	func validTargetGroupNamePrefix(v interface{}, k string) (ws []string, errors []error) {
	value := v.(string)
	prefixMaxLength := 32 - resource.UniqueIDSuffixLength
	if len(value) > prefixMaxLength {
	errors = append(errors, fmt.Errorf(
	"%q cannot be longer than %d characters", k, prefixMaxLength))
	}
	if !regexp.MustCompile(`^[0-9A-Za-z-]+$`).MatchString(value) {
	errors = append(errors, fmt.Errorf(
	"only alphanumeric characters and hyphens allowed in %q", k))
	}
	if regexp.MustCompile(`^-`).MatchString(value) {
	errors = append(errors, fmt.Errorf(
	"%q cannot begin with a hyphen", k))
	}
	return
	}

terraform-provider-aws/internal/service/elbv2/target_group.go

Lines 149 to 155 in e3c56e8

	"name_prefix": {
	Type: schema.TypeString,
	Optional: true,
	ForceNew: true,
	ConflictsWith: []string{"name"},
	ValidateFunc: validTargetGroupNamePrefix,
	},

Relevant Error/Panic Output Snippet

No response

Terraform Configuration Files

provider "aws" {}

resource "aws_alb_target_group" "tg" {
  count       = 5
  name_prefix = "tg-${count.index + 1}"
  port        = "80"
  protocol    = "HTTP"
  vpc_id   = aws_vpc.main.id
}

Steps to Reproduce

terraform validate

Debug Output

No response

Panic Output

No response

Important Factoids

No response

References

No response

Would you like to implement a fix?

No response

[github-actions]

Community Note

Voting for Prioritization

• Please vote on this issue by adding a 👍 reaction to the original post to help the community and maintainers prioritize this request.
• Please see our prioritization guide for information on how we prioritize.
• Please do not leave "+1" or other comments that do not add relevant new information or questions, they generate extra noise for issue followers and do not help prioritize the request.

Volunteering to Work on This Issue

• If you are interested in working on this issue, please leave a comment.
• If this would be your first contribution, please review the contribution guide.

[github-actions]

Marking this issue as stale due to inactivity. This helps our maintainers find and focus on the active issues. If this issue receives no comments in the next 30 days it will automatically be closed. Maintainers can also remove the stale label.

If this issue was automatically closed and you feel this issue should be reopened, we encourage creating a new issue linking back to this one for added context. Thank you!