尝试为discord bot创建一个用户信息代码，一切运行良好，但当它加载时，字段Joined Server被设置为未定义的任何提示？

Question

im使用节点和visual studio代码，脚本运行良好，文本嵌入，它正好在字段标题的正下方，而不是实际显示连接的服务器日期，它只是说“未定义”。

switch(args[0]){
case 'userinfo':         
     let usera = message.mentions.users.first()
     if(!usera) return message.channel.send("Must specify user")
     const joinDiscord = moment(user.createdAt).format('llll')

          let embed = new Discord.MessageEmbed()
          .setAuthor(usera.tag, usera.avatarURL)
          .addField("ID", usera.id, true)
          .addField("Username", usera.username, true)
          .addField("Status", usera.presence.status, true)
          .addField("Joined Server",usera.joinedAt, true)//its this part
          .addField("Created", usera.createdAt, true)
          .addField("Bot", usera.bot, true)
          .setTimestamp()
          .setColor(0x0f7fa6)
          .setThumbnail(usera.displayAvatarURL())
     message.channel.send({embed});
                        
}
});

Answer 1

joinedat是GuildMember对象类型的变量，但您拥有的是一个用户对象。您可以通过执行以下操作从user对象获取member对象:

switch(args[0]){
case 'userinfo':         
     let usera = message.mentions.users.first()
     if(!usera) return message.channel.send("Must specify user")
     const joinDiscord = moment(user.createdAt).format('llll')

          let embed = new Discord.MessageEmbed()
          .setAuthor(usera.tag, usera.avatarURL)
          .addField("ID", usera.id, true)
          .addField("Username", usera.username, true)
          .addField("Status", usera.presence.status, true)
          .addField("Joined Server",message.channel.guild.members.cache.get(usera.id).joinedAt, true)//got the guild member from the users id
          .addField("Created", usera.createdAt, true)
          .addField("Bot", usera.bot, true)
          .setTimestamp()
          .setColor(0x0f7fa6)
          .setThumbnail(usera.displayAvatarURL())
     message.channel.send({embed});
                        
}
});