From 423731751d4d676f8ee977818fb565884efcd843 Mon Sep 17 00:00:00 2001
From: Tulir Asokan <tulir@maunium.net>
Date: Fri, 13 Apr 2018 19:45:54 +0300
Subject: [PATCH] Make sure BotChat row exists before trying to delete it

---
 mautrix_telegram/bot.py | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/mautrix_telegram/bot.py b/mautrix_telegram/bot.py
index 02ef656a..e56eb814 100644
--- a/mautrix_telegram/bot.py
+++ b/mautrix_telegram/bot.py
@@ -103,8 +103,10 @@ class Bot(AbstractUser):
             del self.chats[id]
         except KeyError:
             pass
-        self.db.delete(BotChat.query.get(id))
-        self.db.commit()
+        existing_chat = BotChat.query.get(id)
+        if existing_chat:
+            self.db.delete(existing_chat)
+            self.db.commit()
 
     async def _can_use_commands(self, chat, tgid):
         if tgid in self.tg_whitelist: