Update in_whitelist_check to check against the parent channel, if one exists

docs/changelog.rst

@@ -4,6 +4,9 @@
 Changelog
 =========
 
+- :release:`11.8.0 <4th September 2025>`
+- :feature:`305` Update :obj:`pydis_core.utils.checks.in_whitelist_check` to check against the parent channel, if one exists, instead of the ``ctx.channel.id``.
+
 - :release:`11.7.0 <10th August 2025>`
 - :bug:`304 major` Update Discord invite regex to handle new protocol.
 

pydis_core/utils/checks.py

@@ -1,5 +1,6 @@
 import datetime
 from collections.abc import Callable, Container, Iterable
+from typing import TYPE_CHECKING
 
 from discord.ext.commands import (
     BucketType,
@@ -14,6 +15,9 @@
 
 from pydis_core.utils.logging import get_logger
 
+if TYPE_CHECKING:
+    import discord
+
 log = get_logger(__name__)
 
 
@@ -74,9 +78,14 @@ def in_whitelist_check(
         # categories, it's probably not wise to rely on its category in any case.
         channels = tuple(channels) + (redirect,)
 
-    if channels and ctx.channel.id in channels:
-        log.trace(f"{ctx.author} may use the `{ctx.command.name}` command as they are in a whitelisted channel.")
-        return True
+    if channels:
+        # If the channel is a thread/forum post we want to check the parent channel instead.
+        parent: discord.ForumChannel | discord.TextChannel | None = getattr(ctx.channel, "parent", None)
+        channel_id_to_check = parent.id if parent else ctx.channel.id
+
+        if channel_id_to_check in channels:
+            log.trace(f"{ctx.author} may use the `{ctx.command.name}` command as they are in a whitelisted channel.")
+            return True
 
     # Only check the category id if we have a category whitelist and the channel has a `category_id`
     if categories and hasattr(ctx.channel, "category_id") and ctx.channel.category_id in categories:

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "pydis_core"
-version = "11.7.0"
+version = "11.8.0"
 description = "PyDis core provides core functionality and utility to the bots of the Python Discord community."
 authors = ["Python Discord <[email protected]>"]
 license = "MIT"