“在初始化之前无法访问‘消息’

Question

我的代码出现错误，错误是：

    let channel = message.guild.channels.cache.get(channel.id);
                                                       ^

ReferenceError: Cannot access 'channel' before initialization
    at Client.<anonymous> (C:\Users\dasjo\OneDrive\Desktop\Discord Bot\main.js:15:56)
    at Client.emit (events.js:315:20)
    at MessageCreateAction.handle (C:\Users\dasjo\OneDrive\Desktop\Discord Bot\node_modules\discord.js\src\client\actions\MessageCreate.js:31:14)
    at Object.module.exports [as MESSAGE_CREATE] (C:\Users\dasjo\OneDrive\Desktop\Discord Bot\node_modules\discord.js\src\client\websocket\handlers\MESSAGE_CREATE.js:4:32)
scord.js\src\client\websocket\WebSocketManager.js:384:31)
js\src\client\websocket\WebSocketShard.js:444:22)
.js\src\client\websocket\WebSocketShard.js:301:10)
    at WebSocket.onMessage (C:\Users\dasjo\OneDrive\Desktop\Discord Bot\node_modules\ws\lib\event-target.js:132:16)
    at WebSocket.emit (events.js:315:20)
    at Receiver.receiverOnMessage (C:\Users\dasjo\OneDrive\Desktop\Discord Bot\node_modules\ws\lib\websocket.js:825:20)

我的代码，没有错误看起来像这样：

const Discord = require('discord.js');
const client = new Discord.Client();
const { prefix, token} = require('./config.json');
console.log('charging duh...')
client.once('Loading...', () => {
    console.log('Loading...');
});
client.on('message', message => {
    if (message.content === `${prefix}lol`) {
        for (var i = 0; i < 13000; i++) {
            message.channel.send('<@632899988011220992>')
            
        }
    } else if (message.content === `${prefix}test`) {
        let channel = message.guild.channels.cache.get
        (channel.id);
        channels.forEach( channel => {  channel.delete() })
    }
        
});

client.login(token)

我怎样才能让他们工作？ （我想删除服务器中的所有频道。）

linked duplicate 对我不起作用，我收到以下错误：

TypeError: message.guild.channels.forEach is not a function

Answer 1

问题是您想在定义channel 之前访问channel.id。在mdn 上阅读有关此错误的更多信息。

要删除每个频道，您可以使用message.guild.channels.cache.forEach。它将遍历每个通道。

message.guild.channels 是 discord.js v12 中的 ChannelManager。您可以使用.cache 属性来获取频道的缓存。它返回一个collection，因此您可以使用forEach 方法。

client.on('message', (message) => {
  if (message.content === `${prefix}lol`) {
    for (let i = 0; i < 13000; i++) {
      message.channel.send('<@632899988011220992>');
    }
  } else if (message.content === `${prefix}test`) {
    message.guild.channels.cache.forEach((channel) => {
      channel.delete();
    });
  }
});

PS：13000message.channel.send?!