From 2c8769adf6151113417ecc7851942451354134da Mon Sep 17 00:00:00 2001
From: Laurence Jones <laurence.jones@live.co.uk>
Date: Fri, 16 Jun 2023 18:34:55 +0100
Subject: [PATCH] Update jsonextract.go (#2287)

Return nil instead of empty string as ParseKV does the same
---
 pkg/exprhelpers/jsonextract.go | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkg/exprhelpers/jsonextract.go b/pkg/exprhelpers/jsonextract.go
index a874122ff..a616588a7 100644
--- a/pkg/exprhelpers/jsonextract.go
+++ b/pkg/exprhelpers/jsonextract.go
@@ -175,8 +175,8 @@ func UnmarshalJSON(params ...any) (any, error) {
 	err := json.Unmarshal([]byte(jsonBlob), &out)
 	if err != nil {
 		log.Errorf("UnmarshalJSON : %s", err)
-		return "", err
+		return nil, err
 	}
 	target[key] = out
-	return "", nil
+	return nil, nil
 }