Execute mutation without paramters?

I have a mutation without any parameters seems impossible to execute? (most likely its my GraphQL knowledge is lacking)

The following yields Missing bracets for mutation call scanForDevices.

mutation test {
  scanForDevices {
    id
  }
}

The following yields Error: line 2:17 extraneous input ')' expecting {1..11, 49}.

mutation test {
  scanForDevices() {
    id
  }
}

I have tried both with a empty parameter/arguments class and with no parameter/arguments class at all.

Method:

[GraphQLMutation]
public async Task<Expression<Func<DatabaseContext, IQueryable<Device>>>> ScanForDevices(DatabaseContext databaseContext, Empty parameters, IJobManager jobManager)
{
	var ids = await jobManager.StartWaitAsync<IEnumerable<int>, IDetectDeviceCommand>(ddc => ddc.ScanAsync()).ConfigureAwait(false);
	return ctx => ctx.Devices.Where(x => ids.Contains(x.Id));
}

[lukemurray]

I follow, this repo generates it with (). I don’t think it should. The spec isn’t really clear. GraphiQL does process either. going with no brackets.

[lukemurray]

There is a beta2 with the attribute. Will make non beta in a few days