Discord 机器人无法添加大量角色......抱怨事件监听器 [英] Discord bot having trouble adding lots of roles... complains about event listeners

问题描述

我有一个 Discord 机器人，可以更新我们 Discord 上的排行榜频道.每次在数据库中记录游戏时，机器人都会获取排行榜数据，然后对于遇到的每个 memberId，它会删除所有技能徽章(更高的技能等于更有声望的徽章)，然后根据他们当前的技能添加正确的徽章.出于某种原因，连续添加大量成员角色导致机器人只能通过前 100 名中的大约 15 个成员.我对 js 很陌生，但我认为每个 addRole 命令都会触发 GuildMemberUpdate 事件，而且处理起来实在是太多了.这是我收到的警告信息.紧随其后的是大量添加角色超时错误(我将包括一个).

I have a discord bot that updates a leaderboard channel on our discord. Each time a game is recorded in the database, the bot gets the leaderboard data, then for each memberId it comes across, it removes all the skill badges (higher skill equals more prestigious badge), then adds the correct badge based on their current skill. For some reason, adding a lot of member roles in succession is causing the bot to only get through about 15 or so members out of the top 100. I'm pretty new to js, but I think each addRole command is triggering a GuildMemberUpdate event, and it's just too much to handle. Here is the warning message I get. It's followed by a ton of adding role timeout errors (I'll include one).

(node:612) MaxListenersExceededWarning: Possible EventEmitter memory leak detected. 11 guildMemberUpdate listeners added. Use emitter.setMaxListeners() to increase limit
    at _addListener (events.js:280:19)
    at Client.addListener (events.js:297:10)
    at Promise (/home/ubuntu/bots/node_modules/discord.js/src/client/rest/RESTMethods.js:511:19)
    at new Promise (<anonymous>)
    at RESTMethods.addMemberRole (/home/ubuntu/bots/node_modules/discord.js/src/client/rest/RESTMethods.js:501:12)
    at GuildMember.addRole (/home/ubuntu/bots/node_modules/discord.js/src/structures/GuildMember.js:453:37)
    at C6Leaderboard.applyTags (/home/ubuntu/bots/modules/leaderboard.js:139:17)
    at C6Leaderboard.createLeaderboard (/home/ubuntu/bots/modules/leaderboard.js:110:18)
    at C6Leaderboard.publishLeaderboard (/home/ubuntu/bots/modules/leaderboard.js:67:29)
    at <anonymous>
Error: Adding the role timed out.
    at timeout.client.setTimeout (/home/ubuntu/bots/node_modules/discord.js/src/client/rest/RESTMethods.js:514:16)
    at Timeout.setTimeout [as _onTimeout] (/home/ubuntu/bots/node_modules/discord.js/src/client/Client.js:433:7)
    at ontimeout (timers.js:475:11)
    at tryOnTimeout (timers.js:310:5)
    at Timer.listOnTimeout (timers.js:270:5)

这是我的模块代码的要点:

Here is the gist of my module's code:

class C6Leaderboard
{
    constructor() {
        util.client.on('ready', () =>
        {
            guild = util.client.guilds.get("291751672106188800");
            this.generate(); //generate an up to date leaderboard
        });
    }

    async generate()
    {
        try
        {
            // Grab data
            this.leaderboard = await util.makeRGRequest('leaderboard.php', {});

            // Publish new Leaderboard
            this.publishLeaderboard();
        }
        catch(err)
        {
            console.log('[leaderboard_err]' + err);
        }
    }

    async publishLeaderboard()
    {
        const channel = util.getChannel(483346000233365526);
        const msg = await channel.fetchMessage(channel.lastMessageID());
        const content_new = this.createLeaderboard();

        if( msg.content != content_new) msg.edit( content_new );
    }

    createLeaderboard(i, max_top)
    {
        //loop through leaderboard data
            //print line of leaderboard message
            this.applyTags(this.leaderboard[i].id, this.leaderboard[i].skill);
    }

    async applytags(id, skill)
    {
         if (!guild)
            return;
        let mem = guild.members.get(id);
        if (!mem)
            return;
        mem.removeRoles(difficulties);
        if (skill < 1500)
            mem.addRole(settler).catch(console.error);
        else if (skill >= 1500 && skill < 1600)
            mem.addRole(chieftain).catch(console.error);
        else if (skill >= 1600 && skill < 1700)
            mem.addRole(warlord).catch(console.error);
        else if (skill >= 1700 && skill < 1800)
            mem.addRole(prince).catch(console.error);
        else if (skill >= 1800 && skill < 1900)
            mem.addRole(king).catch(console.error);
        else if (skill >= 1900 && skill < 2000)
            mem.addRole(emperor).catch(console.error);
        else if (skill >= 2000 && skill < 2100)
            mem.addRole(immortal).catch(console.error);
        else if (skill >= 2100)
            mem.addRole(deity).catch(console.error);
    }
}

推荐答案

返回Promise的方法需要使用await调用，不能嵌套.

Methods that return a Promise need to be called using await and cannot be nested.

async function applytags(id, skill)
{
     if (!guild)
        return;
    let mem = await guild.members.get(id);
    if (!mem)
        return;
    await mem.removeRoles(difficulties);
    if (skill < 1500)
        await mem.addRole(settler).catch(console.error);
    else if (skill >= 1500 && skill < 1600)
        await mem.addRole(chieftain).catch(console.error);
    else if (skill >= 1600 && skill < 1700)
        await mem.addRole(warlord).catch(console.error);
    else if (skill >= 1700 && skill < 1800)
        await mem.addRole(prince).catch(console.error);
    else if (skill >= 1800 && skill < 1900)
        await mem.addRole(king).catch(console.error);
    else if (skill >= 1900 && skill < 2000)
        await mem.addRole(emperor).catch(console.error);
    else if (skill >= 2000 && skill < 2100)
        await mem.addRole(immortal).catch(console.error);
    else if (skill >= 2100)
        await mem.addRole(deity).catch(console.error);
}

1. https://anidiots.guide/other-guides/async-await
2. https://hackernoon.com/javascript-promises-and-why-async-await-wins-the-battle-4fc9d15d509f
3. https://medium.com/@tkssharma/writing-neat-asynchronous-node-js-code-with-promises-async-await-fa8d8b0bcd7c
4. https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Promise/all
5. https://developer.mozilla.org/zh-CN/docs/Web/JavaScript/Reference/Statements/async_function

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