use nulls instead of empty strings

examples/mysql-private-ip/main.tf

@@ -28,7 +28,7 @@ resource "random_id" "name" {
 
 locals {
   # If name_override is specified, use that - otherwise use the name_prefix with a random string
-  instance_name        = length(var.name_override) == 0 ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
+  instance_name        = var.name_override == null ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
   private_network_name = "private-network-${random_id.name.hex}"
   private_ip_name      = "private-ip-${random_id.name.hex}"
 }

examples/mysql-private-ip/variables.tf

@@ -55,5 +55,5 @@ variable "db_name" {
 variable "name_override" {
   description = "You may optionally override the name_prefix + random string by specifying an override"
   type        = string
-  default     = ""
+  default     = null
 }

examples/mysql-public-ip/main.tf

@@ -28,7 +28,7 @@ resource "random_id" "name" {
 
 locals {
   # If name_override is specified, use that - otherwise use the name_prefix with a random string
-  instance_name = length(var.name_override) == 0 ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
+  instance_name = var.name_override == null ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
 }
 
 # ------------------------------------------------------------------------------

examples/mysql-public-ip/variables.tf

@@ -55,7 +55,7 @@ variable "db_name" {
 variable "name_override" {
   description = "You may optionally override the name_prefix + random string by specifying an override"
   type        = string
-  default     = ""
+  default     = null
 }
 
 # When configuring a public IP instance, you should only allow secure connections

examples/mysql-replicas/main.tf

@@ -28,7 +28,7 @@ resource "random_id" "name" {
 
 locals {
   # If name_override is specified, use that - otherwise use the name_prefix with a random string
-  instance_name        = "${length(var.name_override) == 0 ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override}"
+  instance_name        = var.name_override == null ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
   private_network_name = "private-network-${random_id.name.hex}"
   private_ip_name      = "private-ip-${random_id.name.hex}"
 }

examples/mysql-replicas/variables.tf

@@ -78,5 +78,5 @@ variable "db_name" {
 variable "name_override" {
   description = "You may optionally override the name_prefix + random string by specifying an override"
   type        = string
-  default     = ""
+  default     = null
 }

examples/postgres-private-ip/main.tf

@@ -28,7 +28,7 @@ resource "random_id" "name" {
 
 locals {
   # If name_override is specified, use that - otherwise use the name_prefix with a random string
-  instance_name        = "${length(var.name_override) == 0 ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override}"
+  instance_name        = var.name_override == null ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
   private_network_name = "private-network-${random_id.name.hex}"
   private_ip_name      = "private-ip-${random_id.name.hex}"
 }

examples/postgres-private-ip/variables.tf

@@ -55,5 +55,5 @@ variable "db_name" {
 variable "name_override" {
   description = "You may optionally override the name_prefix + random string by specifying an override"
   type        = string
-  default     = ""
+  default     = null
 }

examples/postgres-public-ip/main.tf

@@ -28,7 +28,7 @@ resource "random_id" "name" {
 
 locals {
   # If name_override is specified, use that - otherwise use the name_prefix with a random string
-  instance_name = length(var.name_override) == 0 ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
+  instance_name = var.name_override == null ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
 }
 
 # ------------------------------------------------------------------------------

examples/postgres-public-ip/variables.tf

@@ -55,7 +55,7 @@ variable "db_name" {
 variable "name_override" {
   description = "You may optionally override the name_prefix + random string by specifying an override"
   type        = string
-  default     = ""
+  default     = null
 }
 
 # When configuring a public IP instance, you should only allow secure connections

examples/postgres-replicas/main.tf

@@ -28,7 +28,7 @@ resource "random_id" "name" {
 
 locals {
   # If name_override is specified, use that - otherwise use the name_prefix with a random string
-  instance_name        = length(var.name_override) == 0 ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
+  instance_name        = var.name_override == null ? format("%s-%s", var.name_prefix, random_id.name.hex) : var.name_override
   private_network_name = "private-network-${random_id.name.hex}"
   private_ip_name      = "private-ip-${random_id.name.hex}"
 }

examples/postgres-replicas/variables.tf

@@ -78,5 +78,5 @@ variable "db_name" {
 variable "name_override" {
   description = "You may optionally override the name_prefix + random string by specifying an override"
   type        = string
-  default     = ""
+  default     = null
 }