角色分配向特定频道发布公告

Question

我正在使用 discord.js 尝试制作一个机器人，其唯一目的是每当成员被赋予特定角色（alpha、bravo、charlie、delta）时，它都会向特定频道发送通知（#general）恭喜你成为派系的一员！我该怎么做呢？ （我知道它是“GuildMembers”块的一部分）

const Discord = require('discord.js');
const client = new Discord.Client();
const token = 'NzUzNTY0NjA0MjM1MzgyODI1.X1oBug.E0GEmnakRtQMbOfg5IwllQsW_Ps';

client.on('ready', () => {
    console.log('This bot is online!')
})


client.on("guildMemberUpdate", async(oldMember, newMember) => {
    // On `guildMemberUpdate`

    if (oldMember.roles.cache !== newMember.roles.cache) {
        // Check if a role was updated

        let newRole;
        newMember.roles.cache.forEach((role) => {
            if (oldMember.roles.cache.includes(role)) return;
            // Check for the new role that was added

            let roleNames = ["bobbies", "beebos", "babbos", "bobbios"];
            if (roleNames.toLowerCase().includes(role.name.toLowerCase())) {
                // Check for only `['bobbies', 'beebos', 'babbos', 'bobbios']`
                newRole = role;
            }
        });

        // Anything you want to run here with the `newRole` data.
        const channel = oldMember.guild.channels.cache.find(
            (channel) => channel.name === "general"
        );
        channel.send("Congratulations on becoming part of the faction!");
    }
});


client.login(token);

不幸的是，这会返回错误：

(node:6240) UnhandledPromiseRejectionWarning: TypeError: oldMember.roles.cache.includes is not a function
    at C:\Users\sanderj\Desktop\Discord Bot\index.js:18:39
    at Map.forEach (<anonymous>)
    at Client.<anonymous> (C:\Users\sanderj\Desktop\Discord Bot\index.js:17:31)
    at Client.emit (events.js:315:20)
    at Object.module.exports [as GUILD_MEMBER_UPDATE] (C:\Users\sanderj\Desktop\Discord Bot\node_modules\discord.js\src\client\websocket\handlers\GUILD_MEMBER_UPDATE.js:25:16)
    at WebSocketManager.handlePacket (C:\Users\sanderj\Desktop\Discord Bot\node_modules\discord.js\src\client\websocket\WebSocketManager.js:384:31)
    at WebSocketShard.onPacket (C:\Users\sanderj\Desktop\Discord Bot\node_modules\discord.js\src\client\websocket\WebSocketShard.js:444:22)
    at WebSocketShard.onMessage (C:\Users\sanderj\Desktop\Discord Bot\node_modules\discord.js\src\client\websocket\WebSocketShard.js:301:10)
    at WebSocket.onMessage (C:\Users\sanderj\Desktop\Discord Bot\node_modules\ws\lib\event-target.js:125:16)
    at WebSocket.emit (events.js:315:20)
(node:6240) UnhandledPromiseRejectionWarning: Unhandled promise rejection. 

此错误源于在没有 catch 块的情况下抛出异步函数内部，或拒绝未使用 .catch() 处理的承诺。要在未处理的 Promise 拒绝时终止节点进程，请使用 CLI 标志 --unhandled-rejections=strict（请参阅 https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode）。 （拒绝编号：1） （节点：6240）[DEP0018] DeprecationWarning：不推荐使用未处理的承诺拒绝。将来，未处理的 Promise 拒绝将使用非零退出代码终止 Node.js 进程。

Answer 1

查看Client#guildMemberUpdate，当与member 属性有关的某些内容发生更改（即添加角色）时，它会发出。尝试将此代码添加到您的机器人：

client.on("guildMemberUpdate", async (oldMember, newMember) => {
  // On `guildMemberUpdate`

  if (!oldMember.roles.cache.equals(newMember.roles.cache)) {
    // Check if a role was updated

    let newRole;
    newMember.roles.cache.forEach((role) => {
      if (oldMember.roles.cache.includes(role)) return;
      // Check for the new role that was added

      let roleNames = ["alpha", "bravo", "charlie", "delta"];
      if (roleNames.toLowerCase().includes(role.name.toLowerCase())) {
        // Check for only `['alpha', 'bravo', 'charlie', 'delta']`
        newRole = role;
      }
    });

    // Anything you want to run here with the `newRole` data.
    const channel = oldMember.guild.channels.cache.find(
      (channel) => channel.name === "general"
    );
    channel.send("Congratulations on becoming part of the faction!");
  }
});