無法讀取未定義 discord.js 的屬性“計數”

Question

我正在使用 discord.js 的第 12 版，並且正在制作贈品命令。

let embed = new Discord.MessageEmbed()
            .setTitle('Giveaway!')
            .setAuthor('Hosted by ' + message.author.username, message.author.avatarURL())
            .setDescription('The prize is **' + prize + '**!')
            .setTimestamp(Date.now() + ms(args[1]))
            .setColor("BLUE")
            let m = await channel.send(embed)
            m.react("🎉")
            setTimeout(() => {
                if (m.reactions.cache.get("🎉").count <= 1) {
                  message.channel.send(`Reactions: ${m.reactions.cache.get("🎉").count}`);
                  return err('Not enough people reacted!')
                }

那是我的代碼，我得到這個錯誤：

                if (m.reactions.cache.get("🎉").count <= 1) {
                                               ^

TypeError: Cannot read property 'count' of undefined
    at Timeout._onTimeout (C:\Users\abhir\Downloads\Tada!\index.js:38:48)
    at listOnTimeout (internal/timers.js:549:17)
    at processTimers (internal/timers.js:492:7)

細節：

操作系統：Windows 家庭 64 位 Node.JS 版本：12 Discord.JS 版本：12.0.0

Answer 1

您應該嘗試在超時完成后重新獲取消息：

let m = await channel.send(embed);
m.react("🎉");
            
setTimeout(() => {
    const message = channel.messages.cache.get(m.id);
    const reactions = message.reactions.cache.get("🎉");

    if (!reactions) return message.channel.send('No reactions found.');

    if (reactions.count <= 1) {
        message.channel.send(`Reactions: ${reactions.count}`);
        return err('Not enough people reacted!');
    }
    // Do your stuff

希望這能解決您的問題:)