From cb67f4c62dac184303bb04019ce71ffd3ee66f87 Mon Sep 17 00:00:00 2001
From: Yannick Martin <yannick.martin@ovhcloud.com>
Date: Mon, 26 Aug 2024 18:03:33 +0200
Subject: [PATCH] allow 0 value as a valid value for set() and observe()

---
 prometheus.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/prometheus.lua b/prometheus.lua
index a1848a8..a5fedcf 100644
--- a/prometheus.lua
+++ b/prometheus.lua
@@ -549,7 +549,7 @@ end
 --   value: numeric value.
 --   label_values: a list of label values, in the same order as label keys.
 local function set(self, value, label_values)
-  if not value then
+  if tonumber(value) == nil then
     self._log_error("No value passed for " .. self.name)
     return
   end
@@ -573,7 +573,7 @@ end
 --   value: numeric value to record. Should be defined.
 --   label_values: a list of label values, in the same order as label keys.
 local function observe(self, value, label_values)
-  if not value then
+  if tonumber(value) == nil then
     self._log_error("No value passed for " .. self.name)
     return
   end