Question

我试图将此代码用于avatar命令，以便甚至可以使用.avatar @mention ||甚至使用外部服务器的ID。 .avatar ID，但显示作者头像的.avatar不起作用，这是错误的。

(node:9656) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'id' of undefined
    at Object.User (C:\Users\zakaria\Desktop\test1011-master\node_modules\discord.js\src\util\Constants.js:109:16)
    at RESTMethods.getUser (C:\Users\zakaria\Desktop\test1011-master\node_modules\discord.js\src\client\rest\RESTMethods.js:406:51)
    at Client.fetchUser (C:\Users\zakaria\Desktop\test1011-master\node_modules\discord.js\src\client\Client.js:319:30)
    at Client.<anonymous> (C:\Users\zakaria\Desktop\test1011-master\bot.js:963:31)
    at Client.emit (events.js:327:22)
    at MessageCreateHandler.handle (C:\Users\zakaria\Desktop\test1011-master\node_modules\discord.js\src\client\websocket\packets\handlers\MessageCreate.js:9:34)
    at WebSocketPacketManager.handle (C:\Users\zakaria\Desktop\test1011-master\node_modules\discord.js\src\client\websocket\packets\WebSocketPacketManager.js:108:65)
    at WebSocketConnection.onPacket (C:\Users\zakaria\Desktop\test1011-master\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:336:35)
    at WebSocketConnection.onMessage (C:\Users\zakaria\Desktop\test1011-master\node_modules\discord.js\src\client\websocket\WebSocketConnection.js:299:17)
    at WebSocket.onMessage (C:\Users\zakaria\Desktop\test1011-master\node_modules\ws\lib\event-target.js:120:16)
(node:9656) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag `--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:9656) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

我的代码：

    const args = message.content.slice(prefix.length).trim().split(/ +/g);
    const command = args.shift().toLowerCase();
    if(command === 'avatar') {
        const userid = await client.fetchUser(args[0]);
        const User = message.mentions.users.first() || userid || message.author ;
        const embed = new Discord.RichEmbed()
            .setColor('#000000')
            .setAuthor(`${User.username}#${User.discriminator}`, User.displayAvatarURL)
            .setDescription(`[Avatar Link](${User.avatarURL})`)
            .setImage(User.displayAvatarURL)
            .setFooter(`Requested By ${message.author.username}#${message.author.discriminator}`, message.author.displayAvatarURL);
        message.channel.send(embed);
    }

Answer 1

此错误源自discord.js源文件中的this line：

if (userID.id) userID = userID.id;

在这种情况下，

userID是直接从fetchUser(args[0])传递的。这意味着您的args[0]是未定义的，但是您还是尝试client.fetchUser(undefined)，而discord.js抛出了一个神秘的错误，因为它没有检查fetchUser()中的用户输入。

要解决此问题，您只需要使用一个有条件的语句即可避免尝试发出无效的请求。我建议像这样：

if(command === 'avatar') {
    const User = message.mentions.users.first() ||
                 (args[0] && await client.fetchUser(args[0])) ||
                 message.author;
    const embed = ...
}

如何显示消息作者头像将用户ID添加到const

1 个答案: