如何在另一个公会中扮演角色并在新公会 Discord.js v.12 中获得排名

Question

run: async (client, message, args) => {
    let rolemember = message.guild.roles.cache.get("846761815899111460");
    const supportGuild = message.client.guilds.cache.get('830488981518942319')
    console.log(`supportGuild : ${supportGuild}`)
    const usermember = supportGuild.members.cache.get(message.author.id)
    console.log(`usermember : ${usermember}`)

    if(usermember.roles.has("831476829126393887")) {
      message.member.roles.add(rolemember);
      console.error();
      return message.channel.send(`${message.author} You already have this role`);
    }
    else{
      return message.channel.send(`${message.author} You don't have this role!`);
    }
  }
}

在日志中写着usermember : undefined

错误是：

(node:3696) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'roles' of undefined

感谢 Zsolt Meszaros

Answer 1

尝试fetch用户而不是依赖缓存，并检查该用户是否存在于其他公会中：

run: async (client, message, args) => {
  const rolemember = message.guild.roles.cache.get('846761815899111460');
  const supportGuild = message.client.guilds.cache.get('830488981518942319');
  const usermember = await supportGuild.members.fetch(message.author.id);

  if (!usermember)
    return message.channel.send(`${message.author} is not found on the ${supportGuild.name} server`);

  if (!usermember.roles.cache.has('831476829126393887'))
    return message.channel.send(`${message.author} You don't have this role!`);

  message.member.roles.add(rolemember);
  return message.channel.send(`${message.author} You already have this role`);
},

Answer 2

主要问题：.has()function 不是 #GuildMemberRoleManager 类中的函数。

试试：

usermember.roles.cache.get("831476829126393887")

if 语句内部

另外你没有指出哪一行给出了错误，所以我假设用户是问题所在。下次再清楚一点。