TypeError：无法读取未定义 Discord.js 的属性“公会”答案

【问题标题】：TypeError: Cannot read property 'guild' of undefined Discord.jsTypeError：无法读取未定义 Discord.js 的属性“公会”
【发布时间】：2021-06-25 11:55:49
【问题描述】：

我目前遇到 Discord.js 的问题，它说：无法读取未定义的属性 'guild'。

msg.guild.id ^

它只是发送那个错误，代码：

client.on('message', (message, msg) => {
    if(db.get(`${msg.guild.id}_prefix`)) {
      var prefix = defaultPrefix;
    } else { 
        var prefix = db.get(`${msg.guild.id}_prefix`); 
    }
    if(msg.content.startsWith(prefix + `ping`)) {
        msg.channel.send(`Fetching Latency...`).then((m) => {
        const ping = new Discord.MessageEmbed()
        .setTitle(`Pong! ????`)
        .addFields( { name: `API Latency`, value: `${client.ws.ping}ms` },
                    { name: `Bot Latency`, value: `${msg.createdTimestamp - m.createdTimestamp}ms` } )
            m.delete()
           msg.channel.send(ping)
    })}
});

请帮帮我

【问题讨论】：

标签： node.js

【解决方案1】：

我用一些 cmets 重写了您的代码，以便更好地向您解释一切如何工作以及解决您的问题：

//! YOUR MAIN ERROR -> There is only one callback given to the on 'message' event. Which is a Discord.Message Object.
client.on('message', (msg) => {
    if (db.get(`${msg.guild.id}_prefix`)) {
        //let is a better option than var, since its newer it will likely be interpreted longer.
        let prefix = defaultPrefix;
    } else {
        //Once Again let is a better option than var, since its newer it will likely be interpreted longer.
        let prefix = db.get(`${msg.guild.id}_prefix`);
    }
    /*
    Since you're using the `` to define a string you dont need the (prefix + `ping`)
    Instead you can use (`${prefix}ping`)
    */
    if (msg.content.startsWith(`${prefix}ping`)) {
        /*
        Here I would recommend ; instead of ... it indicates a pause.
        You can also use msg.channel.startTyping() to validate the bot is in fact responding.
        */
        msg.channel.send("Fetching Latency...").then((m) => {
            //pingEmbed is a better naming option than ping, as per use of camelCasing and its own use.
            const pingEmbed = new Discord.MessageEmbed()
                .setTitle(`Pong! ?`)
                .addFields({ name: `API Latency`, value: `${client.ws.ping}ms` },
                    { name: `Bot Latency`, value: `${msg.createdTimestamp - m.createdTimestamp}ms` })
            m.delete({timeout:200, reason:"Needed To Clean Up Chat!"}).catch(err => {console.log(err)}) //Make sure you are specifying a timeout (in mili-seconds)... Reason is always optional but recommended as well.
            //If you took the above advice down here is where you would call msg.channel.stopTyping();
            msg.channel.send(pingEmbed)
        }).catch(err => {console.log(err)}); // Be Sure To Catch anything that could error. 
        //If you have multiple .then() statements, its "USUALLY" better to use a try{}catch(err){} block instead.
    }
});

【讨论】：

【解决方案2】：

通常client.on('message', (message, msg) => {} 只接受一个输出，如您所见：discord.js

所以你应该只使用message

【讨论】：