From 6147481b4086e937ddf91b8a829315a714cc89f9 Mon Sep 17 00:00:00 2001
From: Alex Snaps <alex@wcgw.dev>
Date: Tue, 15 Oct 2024 10:29:04 -0400
Subject: [PATCH] Deal with nil expression.Value as ""

---
 pkg/evaluators/authorization/kubernetes_authz.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkg/evaluators/authorization/kubernetes_authz.go b/pkg/evaluators/authorization/kubernetes_authz.go
index 613a7778..947327ea 100644
--- a/pkg/evaluators/authorization/kubernetes_authz.go
+++ b/pkg/evaluators/authorization/kubernetes_authz.go
@@ -64,6 +64,9 @@ func (k *KubernetesAuthz) Call(pipeline auth.AuthPipeline, ctx gocontext.Context
 
 	authJSON := pipeline.GetAuthorizationJSON()
 	jsonValueToStr := func(value expressions.Value) (string, error) {
+		if value == nil {
+			return "", nil
+		}
 		resolved, err := value.ResolveFor(authJSON)
 		if err != nil {
 			return "", err