From 014bc64d3b30cb4e26b584f8ceb2224fefb3c64e Mon Sep 17 00:00:00 2001
From: Thales Macedo Garitezi <thalesmg@gmail.com>
Date: Wed, 6 Sep 2023 16:12:18 -0300
Subject: [PATCH] chore: ensure general prop is a binary

---
 apps/emqx_rule_engine/src/emqx_rule_actions.erl | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/apps/emqx_rule_engine/src/emqx_rule_actions.erl b/apps/emqx_rule_engine/src/emqx_rule_actions.erl
index a83902aad..ce74203a4 100644
--- a/apps/emqx_rule_engine/src/emqx_rule_actions.erl
+++ b/apps/emqx_rule_engine/src/emqx_rule_actions.erl
@@ -327,4 +327,5 @@ coerce_properties_values(MQTTProperties, #{metadata := #{rule_id := RuleId}}) ->
 encode_mqtt_property('Payload-Format-Indicator', V) -> ensure_int(V);
 encode_mqtt_property('Message-Expiry-Interval', V) -> ensure_int(V);
 encode_mqtt_property('Subscription-Identifier', V) -> ensure_int(V);
-encode_mqtt_property(_Prop, V) -> V.
+%% note: `emqx_placeholder:proc_tmpl/2' currently always return a binary.
+encode_mqtt_property(_Prop, V) when is_binary(V) -> V.