From c250195cc86b0482d8e7af3656d7793c6226eb3b Mon Sep 17 00:00:00 2001
From: StarHeartHunt <starheart233@gmail.com>
Date: Sun, 14 Jan 2024 11:54:33 +0800
Subject: [PATCH] :bug: serialize should check message length

Fix #87
---
 nonebot/adapters/feishu/message.py | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/nonebot/adapters/feishu/message.py b/nonebot/adapters/feishu/message.py
index 5e38da2..6f90170 100644
--- a/nonebot/adapters/feishu/message.py
+++ b/nonebot/adapters/feishu/message.py
@@ -606,8 +606,10 @@ def serialize(self) -> Tuple[str, str]:
                     combined.update(seg.data)
 
             return "post", json.dumps(combined, ensure_ascii=False)
-        else:
+        elif len(self) == 1:
             return self[0].type, json.dumps(self[0].data, ensure_ascii=False)
+        else:
+            raise ValueError("Cannot serialize empty message")
 
     @staticmethod
     def deserialize(