Allow Message.channel to be a thread

discord/guild.py

@@ -493,6 +493,10 @@ class Guild(Hashable):
     def get_channel(self, channel_id):
         """Returns a channel with the given ID.
 
+        .. note::
+
+            This does *not* search for threads.
+
         Parameters
         -----------
         channel_id: :class:`int`

discord/message.py

@@ -80,6 +80,7 @@ __all__ = (
     'DeletedReferencedMessage',
 )
 
+
 def convert_emoji_reaction(emoji):
     if isinstance(emoji, Reaction):
         emoji = emoji.emoji
@@ -513,8 +514,8 @@ class Message(Hashable):
         This is not stored long term within Discord's servers and is only used ephemerally.
     embeds: List[:class:`Embed`]
         A list of embeds the message has.
-    channel: Union[:class:`TextChannel`, :class:`DMChannel`, :class:`GroupChannel`]
-        The :class:`TextChannel` that the message was sent from.
+    channel: Union[:class:`TextChannel`, :class:`Thread`, :class:`DMChannel`, :class:`GroupChannel`]
+        The :class:`TextChannel` or :class:`Thread` that the message was sent from.
         Could be a :class:`DMChannel` or :class:`GroupChannel` if it's a private message.
     reference: Optional[:class:`~discord.MessageReference`]
         The message that this message references. This is only applicable to messages of
@@ -632,7 +633,7 @@ class Message(Hashable):
         self,
         *,
         state: ConnectionState,
-        channel: Union[TextChannel, DMChannel, GroupChannel],
+        channel: Union[TextChannel, Thread, DMChannel, GroupChannel],
         data: MessagePayload,
     ):
         self._state = state
@@ -850,7 +851,7 @@ class Message(Hashable):
     def _handle_components(self, components: List[ComponentPayload]):
         self.components = [_component_factory(d) for d in components]
 
-    def _rebind_channel_reference(self, new_channel: Union[TextChannel, DMChannel, GroupChannel]) -> None:
+    def _rebind_channel_reference(self, new_channel: Union[TextChannel, Thread, DMChannel, GroupChannel]) -> None:
         self.channel = new_channel
 
         try:

discord/state.py

@@ -380,7 +380,7 @@ class ConnectionState:
             channel = DMChannel._from_message(self, channel_id)
             guild = None
         else:
-            channel = guild and guild.get_channel(channel_id)
+            channel = guild and (guild.get_channel(channel_id) or guild.get_thread(channel_id))
 
         return channel or Object(id=channel_id), guild
 
@@ -1181,7 +1181,7 @@ class AutoShardedConnectionState(ConnectionState):
             new_guild = self._get_guild(msg.guild.id)
             if new_guild is not None and new_guild is not msg.guild:
                 channel_id = msg.channel.id
-                channel = new_guild.get_channel(channel_id) or Object(id=channel_id)
+                channel = new_guild.get_channel(channel_id) or new_guild.get_thread(channel_id) or Object(id=channel_id)
                 msg._rebind_channel_reference(channel)
 
     async def chunker(self, guild_id, query='', limit=0, presences=False, *, shard_id=None, nonce=None):