Refactor code for specifying updates example.

CHANGES/5778.doc.rst

@@ -0,0 +1 @@
+Refactor code for specifying updates example.

examples/specify_updates.py

@@ -2,7 +2,8 @@ import asyncio
 import logging
 
 from aiogram import Bot, Dispatcher, Router
-from aiogram.filters import Command
+from aiogram.enums import ParseMode, UpdateType
+from aiogram.filters import LEAVE_TRANSITION, ChatMemberUpdatedFilter, CommandStart
 from aiogram.types import (
     CallbackQuery,
     ChatMemberUpdated,
@@ -19,7 +20,7 @@ logging.basicConfig(level=logging.INFO)
 router = Router()
 
 
-@router.message(Command("start"))
+@router.message(CommandStart())
 async def command_start_handler(message: Message) -> None:
     """
     This handler receives messages with `/start` command
@@ -57,25 +58,25 @@ sub_sub_router = Router()
 
 @sub_sub_router.edited_message()
 async def edited_message_handler(edited_message: Message) -> None:
-    await edited_message.reply("Message was edited, big brother watch you")
+    await edited_message.reply("Message was edited, Big Brother watches you")
 
 
 # this router will use only my_chat_member updates
 deep_dark_router = Router()
 
 
-@deep_dark_router.my_chat_member()
+@deep_dark_router.my_chat_member(~ChatMemberUpdatedFilter(LEAVE_TRANSITION))
 async def my_chat_member_change(chat_member: ChatMemberUpdated, bot: Bot) -> None:
     await bot.send_message(
         chat_member.chat.id,
-        "Member was changed from "
+        "This Bot`s status was changed from "
         + f"{chat_member.old_chat_member.status} to {chat_member.new_chat_member.status}",
     )
 
 
 async def main() -> None:
     # Initialize Bot instance with a default parse mode which will be passed to all API calls
-    bot = Bot(TOKEN, parse_mode="HTML")
+    bot = Bot(TOKEN, parse_mode=ParseMode.HTML)
 
     dp = Dispatcher()
     dp.include_router(router)
@@ -83,11 +84,21 @@ async def main() -> None:
     router.include_router(sub_router)
     router.include_router(sub_sub_router)
 
-    useful_updates = dp.resolve_used_update_types()
+    # Specify which updates should be handled by Dispatcher.
+    # By default, all types, that used in handlers will be used.
+    useful_updates = [
+        UpdateType.MESSAGE,
+        UpdateType.CALLBACK_QUERY,
+        UpdateType.EDITED_MESSAGE,
+        # UpdateType.MY_CHAT_MEMBER,  # Here we decided to skip the my_chat_member updates, even though it's used in our handlers. Uncomment this line to enable it.
+    ]
 
-    # And the run events dispatching
+    # Start event dispatching
     await dp.start_polling(bot, allowed_updates=useful_updates)
 
+    # If you want to use all the update types registered in the dispatcher, you should not specify the `allowed_updates` parameter:
+    # await dp.start_polling(bot)
+
 
 if __name__ == "__main__":
     logging.basicConfig(level=logging.INFO)