FlagConverter not usable on app_commands #10358
Description
Summary
FlagConvert not usable on app_commands
Reproduction Steps
This might be a duplicate of #9641. If yes, feel free to close this.
Minimal Reproducible Code
class RaceFlags(commands.FlagConverter):
goal: str | None = None
when: str | None = None
streaming_required: bool = False
race_info: str | None = None
announce: bool = False
class LadxrRace(commands.Cog):
@app_commands.command()
@app_commands.guild_only()
async def communityrace(
self,
interaction: Interaction,
*,
flags: RaceFlags,
) -> None:
passExpected Results
it should just work :)
Actual Results
| Traceback (most recent call last):
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/ext/commands/bot.py", line 962, in _load_from_module_spec
| spec.loader.exec_module(lib) # type: ignore
| ~~~~~~~~~~~~~~~~~~~~~~~^^^^^
| File "<frozen importlib._bootstrap_external>", line 762, in exec_module
| File "<frozen importlib._bootstrap>", line 491, in _call_with_frames_removed
| File "/home/marcel/projects/discord_bot/v2.0/src/windfish/discord/cogs/ladxr_race.py", line 32, in <module>
| class LadxrRace(commands.Cog):
| ...<65 lines>...
| await interaction.followup.send(f"Your raceroom url: {url}")
| File "/home/marcel/projects/discord_bot/v2.0/src/windfish/discord/cogs/ladxr_race.py", line 45, in LadxrRace
| @app_commands.command()
| ~~~~~~~~~~~~~~~~~~~~^^
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/app_commands/commands.py", line 2065, in decorator
| return Command(
| name=name if name is not MISSING else func.__name__,
| ...<5 lines>...
| extras=extras,
| )
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/app_commands/commands.py", line 688, in __init__
| self._params: Dict[str, CommandParameter] = _extract_parameters_from_callback(callback, callback.__globals__)
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/app_commands/commands.py", line 384, in _extract_parameters_from_callback
| param = annotation_to_parameter(resolved, parameter)
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/app_commands/transformers.py", line 837, in annotation_to_parameter
| (inner, default, validate_default) = get_supported_annotation(annotation)
| ~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/app_commands/transformers.py", line 796, in get_supported_annotation
| raise TypeError(f'unsupported type annotation {annotation!r}')
| TypeError: unsupported type annotation <class 'windfish.discord.cogs.ladxr_race.RaceFlags'>
|
| The above exception was the direct cause of the following exception:
|
| Traceback (most recent call last):
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/client.py", line 846, in start
| await self.login(token)
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/client.py", line 689, in login
| await self.setup_hook()
| File "/home/marcel/projects/discord_bot/v2.0/src/windfish/discord/discord.py", line 47, in setup_hook
| await self.load_extension(mod, package=str(__package__))
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/ext/commands/bot.py", line 1040, in load_extension
| await self._load_from_module_spec(spec, name)
| File "/home/marcel/projects/discord_bot/v2.0/.venv/lib/python3.14/site-packages/discord/ext/commands/bot.py", line 965, in _load_from_module_spec
| raise errors.ExtensionFailed(key, e) from e
| discord.ext.commands.errors.ExtensionFailed: Extension 'windfish.discord.cogs.ladxr_race' raised an error: TypeError: unsupported type annotation <class 'windfish.discord.cogs.ladxr_race.RaceFlags'>
Intents
all
System Information
- Python v3.14.0-final
- discord.py v2.6.4-final
- aiohttp v3.13.2
- system info: Linux 6.17.8-arch1-1 Fix issue with author changing type #1 SMP PREEMPT_DYNAMIC Fri, 14 Nov 2025 06:54:20 +0000
Checklist
- I have searched the open issues for duplicates.
- I have shown the entire traceback, if possible.
- I have removed my token from display, if visible.
Additional Context
No response