fix: fix the prefix input variable in the DA to allow null (#690)

Author: mukulpalit-ibm

solutions/fully-configurable/variables.tf

@@ -37,7 +37,7 @@ variable "prefix" {
 
  validation {
  # must not exceed 16 characters in length
- condition = length(var.prefix) <= 16
+ condition = var.prefix == null || var.prefix == "" ? true : length(var.prefix) <= 16
  error_message = "Prefix must not exceed 16 characters."
  }
 }

solutions/security-enforced/variables.tf

@@ -37,7 +37,7 @@ variable "prefix" {
 
  validation {
  # must not exceed 16 characters in length
- condition = length(var.prefix) <= 16
+ condition = var.prefix == null || var.prefix == "" ? true : length(var.prefix) <= 16
  error_message = "Prefix must not exceed 16 characters."
  }
 }