fix(channel): improve handling of placeholder guilds in GuildChannel and Thread

changelog/1287.bugfix.rst

@@ -0,0 +1 @@
+Improve checks for partial :class:`Guild`\s in guild-dependent attributes of channels and threads, which could previously raise errors with user-installed apps.

disnake/abc.py

@@ -600,6 +600,8 @@ def category(self) -> Optional[CategoryChannel]:
 
         If there is no category then this is ``None``.
         """
+        if isinstance(self.guild, Object):
+            return None
         return self.guild.get_channel(self.category_id)  # type: ignore
 
     @property
@@ -611,7 +613,7 @@ def permissions_synced(self) -> bool:
 
         .. versionadded:: 1.3
         """
-        if self.category_id is None:
+        if self.category_id is None or isinstance(self.guild, Object):
             return False
 
         category = self.guild.get_channel(self.category_id)
@@ -679,6 +681,13 @@ def permissions_for(
         - The default role permission overwrites
         - The permission overwrites of the role used as a parameter
 
+        .. note::
+            If the channel originated from an :class:`.Interaction` and
+            the :attr:`.guild` attribute is unavailable, such as with
+            user-installed applications in guilds, this method will not work
+            due to an API limitation.
+            Consider using :attr:`.Interaction.permissions` or :attr:`~.Interaction.app_permissions` instead.
+
         .. versionchanged:: 2.0
             The object passed in can now be a role object.
 

disnake/channel.py

@@ -44,6 +44,7 @@
 from .flags import ChannelFlags, MessageFlags
 from .iterators import ArchivedThreadIterator
 from .mixins import Hashable
+from .object import Object
 from .partial_emoji import PartialEmoji
 from .permissions import PermissionOverwrite, Permissions
 from .soundboard import GuildSoundboardSound, PartialSoundboardSound, SoundboardSound
@@ -341,6 +342,8 @@ def permissions_for(
     @property
     def members(self) -> List[Member]:
         """List[:class:`Member`]: Returns all members that can see this channel."""
+        if isinstance(self.guild, Object):
+            return []
         return [m for m in self.guild.members if self.permissions_for(m).view_channel]
 
     @property
@@ -349,6 +352,8 @@ def threads(self) -> List[Thread]:
 
         .. versionadded:: 2.0
         """
+        if isinstance(self.guild, Object):
+            return []
         return [thread for thread in self.guild._threads.values() if thread.parent_id == self.id]
 
     def is_nsfw(self) -> bool:
@@ -978,6 +983,8 @@ def get_thread(self, thread_id: int, /) -> Optional[Thread]:
         Optional[:class:`Thread`]
             The returned thread or ``None`` if not found.
         """
+        if isinstance(self.guild, Object):
+            return None
         return self.guild.get_thread(thread_id)
 
     @overload
@@ -1217,6 +1224,9 @@ def _sorting_bucket(self) -> int:
     @property
     def members(self) -> List[Member]:
         """List[:class:`Member`]: Returns all members that are currently inside this voice channel."""
+        if isinstance(self.guild, Object):
+            return []
+
         ret = []
         for user_id, state in self.guild._voice_states.items():
             if state.channel and state.channel.id == self.id:
@@ -1241,6 +1251,9 @@ def voice_states(self) -> Dict[int, VoiceState]:
         Mapping[:class:`int`, :class:`VoiceState`]
             The mapping of member ID to a voice state.
         """
+        if isinstance(self.guild, Object):
+            return {}
+
         return {
             key: value
             for key, value in self.guild._voice_states.items()
@@ -2277,6 +2290,8 @@ def instance(self) -> Optional[StageInstance]:
 
         .. versionadded:: 2.0
         """
+        if isinstance(self.guild, Object):
+            return None
         return utils.get(self.guild.stage_instances, channel_id=self.id)
 
     async def create_instance(
@@ -3090,6 +3105,8 @@ def channels(self) -> List[GuildChannelType]:
 
         These are sorted by the official Discord UI, which places voice channels below the text channels.
         """
+        if isinstance(self.guild, Object):
+            return []
 
         def comparator(channel):
             return (
@@ -3104,6 +3121,9 @@ def comparator(channel):
     @property
     def text_channels(self) -> List[TextChannel]:
         """List[:class:`TextChannel`]: Returns the text channels that are under this category."""
+        if isinstance(self.guild, Object):
+            return []
+
         ret = [
             c
             for c in self.guild.channels
@@ -3115,6 +3135,9 @@ def text_channels(self) -> List[TextChannel]:
     @property
     def voice_channels(self) -> List[VoiceChannel]:
         """List[:class:`VoiceChannel`]: Returns the voice channels that are under this category."""
+        if isinstance(self.guild, Object):
+            return []
+
         ret = [
             c
             for c in self.guild.channels
@@ -3129,6 +3152,9 @@ def stage_channels(self) -> List[StageChannel]:
 
         .. versionadded:: 1.7
         """
+        if isinstance(self.guild, Object):
+            return []
+
         ret = [
             c
             for c in self.guild.channels
@@ -3143,6 +3169,9 @@ def forum_channels(self) -> List[ForumChannel]:
 
         .. versionadded:: 2.5
         """
+        if isinstance(self.guild, Object):
+            return []
+
         ret = [
             c
             for c in self.guild.channels
@@ -3157,6 +3186,9 @@ def media_channels(self) -> List[MediaChannel]:
 
         .. versionadded:: 2.10
         """
+        if isinstance(self.guild, Object):
+            return []
+
         ret = [
             c
             for c in self.guild.channels
@@ -3368,11 +3400,15 @@ def permissions_for(
     @property
     def members(self) -> List[Member]:
         """List[:class:`Member`]: Returns all members that can see this channel."""
+        if isinstance(self.guild, Object):
+            return []
         return [m for m in self.guild.members if self.permissions_for(m).view_channel]
 
     @property
     def threads(self) -> List[Thread]:
         """List[:class:`Thread`]: Returns all the threads that you can see."""
+        if isinstance(self.guild, Object):
+            return []
         return [thread for thread in self.guild._threads.values() if thread.parent_id == self.id]
 
     def is_nsfw(self) -> bool:
@@ -3466,6 +3502,8 @@ def get_thread(self, thread_id: int, /) -> Optional[Thread]:
         Optional[:class:`Thread`]
             The returned thread of ``None`` if not found.
         """
+        if isinstance(self.guild, Object):
+            return None
         return self.guild.get_thread(thread_id)
 
     @overload

disnake/threads.py

@@ -11,6 +11,7 @@
 from .errors import ClientException
 from .flags import ChannelFlags
 from .mixins import Hashable
+from .object import Object
 from .partial_emoji import PartialEmoji, _EmojiTag
 from .permissions import Permissions
 from .utils import MISSING, _get_as_snowflake, _unique, parse_time, snowflake_time
@@ -244,12 +245,14 @@ def type(self) -> ThreadType:
     @property
     def parent(self) -> Optional[Union[TextChannel, ForumChannel, MediaChannel]]:
         """Optional[Union[:class:`TextChannel`, :class:`ForumChannel`, :class:`MediaChannel`]]: The parent channel this thread belongs to."""
+        if isinstance(self.guild, Object):
+            return None
         return self.guild.get_channel(self.parent_id)  # type: ignore
 
     @property
     def owner(self) -> Optional[Member]:
         """Optional[:class:`Member`]: The member this thread belongs to."""
-        if self.owner_id is None:
+        if self.owner_id is None or isinstance(self.guild, Object):
             return None
         return self.guild.get_member(self.owner_id)
 
@@ -429,6 +432,13 @@ def permissions_for(
         :attr:`GuildChannel.permissions_for <.abc.GuildChannel.permissions_for>`
         method directly.
 
+        .. note::
+            If the thread originated from an :class:`.Interaction` and
+            the :attr:`.guild` attribute is unavailable, such as with
+            user-installed applications in guilds, this method will not work
+            due to an API limitation.
+            Consider using :attr:`.Interaction.permissions` or :attr:`~.Interaction.app_permissions` instead.
+
         .. versionchanged:: 2.9
             Properly takes :attr:`Permissions.send_messages_in_threads`
             into consideration.