Discord音乐机器人运行lyrics命令报DiscordAPIError空消息错误如何解决

问题根因与修复方案 #

你代码里共有4处导致空消息报错的问题，按优先级排序如下：

• 首先是Discord.js版本兼容问题：v13及以上版本发送Embed不能直接传入Embed实例，必须包装为{ embeds: [Embed实例] }格式，你直接传入Embed对象会被识别为要发送的纯文本内容，无法转为有效字符串就触发空消息报错。
• 第二是lyrics变量赋值语法错误：lyrics = No lyrics found for ${title}., { title: title } 这里用了逗号表达式，最终lyrics被赋值为后面的对象而非你需要的提示字符串，对象转字符串后会显示无效内容。
• 第三是title变量赋值错误：const title = player.queue.current 这里取的是完整的曲目对象而非曲目名字，直接插入字符串会得到[object Object]无效内容，应该取title属性。
• 第四是setTitle方法传参错误：setTitle(${title} - Lyrics, { title: title }) 第二个参数是无效参数，无任何作用。

修复后的完整代码 #

const { MessageEmbed } = require("discord.js");
const lyricsFinder = require("lyrics-finder");

module.exports = {
    name: "lyrics",
    aliases: ['ly'],
    category: "Music",
    description: "View the lyrics of a song",
    args: false,
    usage: "",
    permission: [],
    owner: false,
    player: true,
    inVoiceChannel: true,
    sameVoiceChannel: true,
    execute: async (message, args, client, prefix) => {
        const player = message.client.manager.get(message.guild.id);
        if (!player.queue.current) {
            let thing = new MessageEmbed()
                .setColor("RED")
                .setDescription("There is no music playing.");
            return message.channel.send({embeds: [thing]});
        }
        let lyrics = null;
        const title = player.queue.current.title;
        try {
            lyrics = await lyricsFinder(title, "");
            if (!lyrics) lyrics = `No lyrics found for ${title}.`;
        } catch (error) {
            lyrics = `No lyrics found for ${title}.`;
        }
        let lyricsEmbed = new MessageEmbed()
            .setTitle(`${title} - Lyrics`)
            .setDescription(lyrics)
            .setColor("#F8AA2A")
            .setTimestamp();
        if (lyricsEmbed.description.length >= 2048) {
            lyricsEmbed.description = `${lyricsEmbed.description.substr(0, 2045)}...`;
        }
        return message.channel.send({embeds: [lyricsEmbed]}).catch(console.error);
    }
};

内容的提问来源于stack exchange，提问作者Anto. B