我试图在我的 !!userinfo 命令中显示角色，但出现错误

Question

我有一个!!userinfo 命令，我正在尝试将它带到我可以@anyone 的地方，它在那里显示了我如何让其他一切工作的信息，但后来我遇到了这个问题，这是错误。

UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'map' of undefined

我查了一下没有答案，但我确实想出了一些东西，它说这通常意味着无人居住，但我不知道如何把它放进去。

const Discord = module.require("discord.js");
const fs = require("fs");
const userdata = JSON.parse(fs.readFileSync('commands/storage/userdata.json', 'utf8'));

module.exports.run = async (bot, message, args) => {
    let member;
    if (message.mentions.users > 0) {
        member = message.mentions.user.size()
    } else {
        member = message.author
    }
    let user;
    if (message.mentions.users > 0) {
        user = message.mentions.user.size()
    } else {
        user = message.author
    }

    embed = new Discord.RichEmbed()
        .setAuthor(message.member.username)
        .setDescription("Users Info", true)
        .setColor("#64FF00", true)
        .addField("Full Username:", `${message.member.username}${message.member.discriminator}`, true)
        .addField("ID:", message.member.id, true)
        .addField("Created at:", message.member.createdAt, true)
        .addField("Status:", `${user.presence.status}`, true)
        .addField("Game:", `${user.presence.game}`, true)
        .addField("Roles", member.roles.map(r => `${r}`).join('|'), true);

    message.channel.send(embed);
}

module.exports.help = {
    name: "userinfo"
}

我想要它，这样我就可以@anyone 并且有信息出现

Answer 1

我认为问题在于如何为变量member 赋值。除此之外，我认为你有一些冗余代码，因为你有一个变量 member 和一个变量 user ，你用相同的代码给它们一个值。

您可以在下面找到我重写的代码。试一试，让我知道结果如何。

module.exports.run = async (bot, message, args) => {
  let guildMember;

  if (message.mentions.members.first()) {
    guildMember = message.mentions.members.first();
  } else {
    guildMember = message.member;
  }

  // We need the User object aswell for different properties
  const user = guildMember.user;

  let embed = new Discord.RichEmbed()
    .setAuthor(user.username)
    .setDescription("Users Info", true)
    .setColor("#64FF00", true)
    .addField("Full Username:", `${user.username}${user.discriminator}`, true)
    .addField("ID:", user.id, true)
    .addField("Created at:", user.createdAt, true)
    .addField("Status:", `${user.presence.status}`, true)
    .addField("Game:", `${user.presence.game}`, true)
    .addField("Roles", guildMember.roles.map(r => `${r}`).join('|'), true);

  message.channel.send(embed);
}

Answer 2

您可以轻松制作第一部分：

let member;
if (message.mentions.users > 0) {
    member = message.mentions.user.size()
} else {
    member = message.author
}
let user;
if (message.mentions.users > 0) {
    user = message.mentions.user.size()
} else {
    user = message.author
}

进入：

const user = message.mentions.users.first() || message.author;
const member = message.mentions.members.first() || message.member;
if(!member) return message.channel.send('This command can only be run in a guild!')

您还想将嵌入位更改为：

let embed = new Discord.RichEmbed()
    .setAuthor(user.tag)
    .setDescription("Users Info", true)
    .setColor("#64FF00", true)
    .addField("Full Username:", user.tag , true)
    .addField("ID:", user.id, true)
    .addField("Created at:", user.createdAt, true)
    .addField("Status:", user.presence.status , true)
    .addField("Game:", user.presence.game ? user.presence.game : 'none' , true)
    .addField("Roles", member.roles.map(r => `${r}`).join(' | '), true);
 message.channel.send(embed);

Answer 3

这会将member 设置为一个数字

member = message.mentions.user.size()

由于member 现在是一个数字，因此尝试访问member.roles 会导致undefined。由于undefined 没有.map 方法，您会看到该异常。