From 50601934b952cbe9733265a3a4a7567881ef12fd Mon Sep 17 00:00:00 2001
From: yanyongyu <yanyongyu_1@126.com>
Date: Mon, 14 Sep 2020 22:38:03 +0800
Subject: [PATCH] :wrench: load extra config value from env if empty in file

---
 nonebot/config.py | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/nonebot/config.py b/nonebot/config.py
index f88b12b5..7b9281fb 100644
--- a/nonebot/config.py
+++ b/nonebot/config.py
@@ -79,6 +79,9 @@ class BaseConfig(BaseSettings):
 
         if env_file_vars:
             for env_name, env_val in env_file_vars.items():
+                if (env_val is None or
+                        len(env_val) == 0) and env_name in env_vars:
+                    env_val = env_vars[env_name]
                 try:
                     env_val = self.__config__.json_loads(env_val)
                 except ValueError as e: