I wrote a simple aiogram chat-bot code, which can write down messages to mongodb database:

`
@router.message(Command(‘memorize’), IsChat([‘group’, ‘supergroup’, ‘chat’, ‘channel’]), IsAdmin(admin_id))
async def memorize_handler(message: Message) -> None:
reply = message.reply_to_message
if not reply:
await message.answer(“⚙ Can’t find user”)
return

text = reply.text
if reply.from_user.username:
    username = reply.from_user.username
else:
    username = reply.from_user.full_name
try:
    user_id = reply.from_user.id
    mention = reply.from_user.mention_html(reply.from_user.first_name)
    memory_id = str(uuid.uuid4())
    memorize(memory_id=memory_id, text=text, username=username, user_id=user_id)
    await message.answer(f'???? Succesfully saved message from {mention}')
except:
    await message.answer(f'❗ Couldnt save message from {mention}')

`

Filter code here:
`

class IsChat(BaseFilter):

def __init__(self, chat_type: str | List[str]) -> None:
    self.chat_type = chat_type

async def __call__(self, message: Message) -> bool:
    if isinstance(self.chat_type, str):
        return message.chat.type == self.chat_type
    return message.chat.type in self.chat_type

`

The problem is, when you call bot from channel-chat – he doesn’t handle updates for some reason.
However, bot still works in private chats, groups and supergroups.

I already tried to expand IsChat filter with ‘channel’ and ‘chat’, but it didn’t work out