From 8983a4d371763ce221ff1bd1e8b2225d5760e5a8 Mon Sep 17 00:00:00 2001
From: Moon <moon.kyong@automattic.com>
Date: Thu, 13 May 2021 21:46:49 -0700
Subject: [PATCH] Make sure transformers exist
 (https://github.com/woocommerce/woocommerce-admin/pull/6987)

---
 .../RemoteInboxNotifications/OptionRuleProcessor.php   | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/plugins/woocommerce-admin/src/RemoteInboxNotifications/OptionRuleProcessor.php b/plugins/woocommerce-admin/src/RemoteInboxNotifications/OptionRuleProcessor.php
index b8b62bdab50..ff141636c2e 100644
--- a/plugins/woocommerce-admin/src/RemoteInboxNotifications/OptionRuleProcessor.php
+++ b/plugins/woocommerce-admin/src/RemoteInboxNotifications/OptionRuleProcessor.php
@@ -72,10 +72,12 @@ class OptionRuleProcessor implements RuleProcessorInterface {
 			return false;
 		}
 
-		foreach ( $rule->transformers as $transform_args ) {
-			$transformer = TransformerService::create_transformer( $transform_args->use );
-			if ( ! $transformer->validate( $transform_args->arguments ) ) {
-				return false;
+		if ( isset( $rule->transformers ) && is_array( $rule->transformers ) ) {
+			foreach ( $rule->transformers as $transform_args ) {
+				$transformer = TransformerService::create_transformer( $transform_args->use );
+				if ( ! $transformer->validate( $transform_args->arguments ) ) {
+					return false;
+				}
 			}
 		}