From a0261003535c771919ad3f11b36fc4af29bc814d Mon Sep 17 00:00:00 2001
From: gabbhack <43146729+gabbhack@users.noreply.github.com>
Date: Thu, 16 Jan 2020 17:14:57 +0500
Subject: [PATCH] Fix ContentTypeFilter

Now the ContentTypeFilter  works correctly with single elements.
---
 aiogram/dispatcher/filters/builtin.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/aiogram/dispatcher/filters/builtin.py b/aiogram/dispatcher/filters/builtin.py
index b80448c9..683ee841 100644
--- a/aiogram/dispatcher/filters/builtin.py
+++ b/aiogram/dispatcher/filters/builtin.py
@@ -444,6 +444,8 @@ class ContentTypeFilter(BoundFilter):
     default = types.ContentTypes.TEXT
 
     def __init__(self, content_types):
+        if isinstance(content_types, str):
+            content_types = (content_types,)
         self.content_types = content_types
 
     async def check(self, message):