由于通道错误，批量删除discord.js不起作用

Question

import DiscordJS, { TextChannel, Intents, Message, Channel } from 'discord.js'
import dotenv from 'dotenv'
dotenv.config()

//sets prefix to be used when running bot commands
const prefix = '~';

//This lets the discord bot know what your intentions are using this bot. Hence the guilds, guilds messages and message reactions
const client = new DiscordJS.Client({
    intents: [
        Intents.FLAGS.GUILDS,
        Intents.FLAGS.GUILD_MESSAGES,
        Intents.FLAGS.GUILD_MESSAGE_REACTIONS,
        Intents.FLAGS.DIRECT_MESSAGES
    ]
})


//Deleting messages in bulk
client.on("message", (message) => {
    if (message.content.toLowerCase().startsWith(prefix + "clearchat")) {
        async function clear() {
            message.delete();
            var fetched = await message.channel.messages.fetch({limit: 99})
            message.channel.bulkDelete(fetched);
        }
        clear();
    }
});

我正在尝试批量删除，但问题是message.channel.bulkDelete(fetched)；.channel部分说它是一个TextBasedChannel，而不是TextChannel。我早些时候问过别人这件事，他们说我应该用TextChannel的时候，却在用DMChannel。我知道它们是不同的类，但我不确定如何在代码中使用DMChannel而不是TextChannel。我不确定如何解决这个问题，如果有人有链接告诉我有什么不同，我会很感激的。只是很难理解DMChannel，因为我是在服务器中使用机器人，而不是在直接消息中。我只是有点迷惑

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编辑:我可以按预期清除聊天，但现在我得到了一个DiscordAPIError。我能捕捉到错误吗？以下是错误消息：

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编辑2:这是上述错误消息之后的内容

 DiscordAPIError: You can only bulk delete messages that are under 14 days old.
    at RequestHandler.execute (C:\Users\theod\Desktop\DiscordBot\node_modules\discord.js\src\rest\RequestHandler.js:298:13)
    at processTicksAndRejections (node:internal/process/task_queues:96:5)
    at async RequestHandler.push (C:\Users\theod\Desktop\DiscordBot\node_modules\discord.js\src\rest\RequestHandler.js:50:14)
    at async TextChannel.bulkDelete (C:\Users\theod\Desktop\DiscordBot\node_modules\discord.js\src\structures\interfaces\TextBasedChannel.js:312:7) {
  method: 'post',
  path: '/channels/872986149294047234/messages/bulk-delete',
  code: 50034,
  httpStatus: 400,
  requestData: { json: { messages: [Array] }, files: [] }

Answer 1

消息可能在DM中，您不能批量删除DM通道中的消息。首先检查消息是否在行会中：

import type { NewsChannel, TextChannel, ThreadChannel } from 'discord.js';

type GuildTextBasedChannel = TextChannel | NewsChannel | ThreadChannel

if (message.content.toLowerCase().startsWith(prefix + "clearchat")) {
    if (message.guild) {
        async function clear() {
            message.delete();
            var fetched = await message.channel.messages.fetch({limit: 99})
            (message.channel as GuildTextBasedChannel).bulkDelete(fetched, true);
        }
        clear();
    }
}

不幸的是，Discord.js的类型不是很好，所以需要类型断言as GuildTextBasedChannel来让TypeScript知道如果message.channel不是null，那么message.guild必须是一个基于行会文本的通道。

如果需要，您可以定义一个帮助器函数来消除对此类型断言的需要：

import type { Message } from 'discord.js';

function inGuild(message: Message): message is Message & { readonly channel: GuildTextBasedChannel } {
    return message.guild !== null;
}

if (inGuild(message)) {
  message.channel.bulkDelete(99, true); // no type assertion needed
}

或者，您可以使用类似以下内容：

import type * as Discord from 'discord.js';

type Message = Discord.Message &
  (
    | {
        readonly channel: GuildTextBasedChannel;
        readonly guild: Discord.Guild;
      }
    | {
        readonly channel:
          | Discord.DMChannel
          // if you're using partials
          | Discord.PartialDMChannel;
        readonly guild: null;
      }
  );

client.on("messageCreate", (_message) => {
    const message = _message as Message;
    // rest of code...
    // type assertion not required
});

bulkDelete(fetched, true)中的true参数意味着Discord.js将自动过滤超过14天的邮件。不一致不允许您批量删除超过14天的邮件，这是您的错误消息告诉您的。