（节点：7528）UnhandledPromiseRejectionWarning：TypeError：无法读取未定义的属性“确保”

Question

我正在尝试设置一个警告命令，该命令将基于每个服务器的警告信息推送到我的数据库。但是……它不喜欢这个主意

module.exports.run = async(client, message, args) => {


  const Discord = require('discord.js')
  if(!message.member.roles.find(r => r.name === 'moderator')) return message.channel.send(`You do not have the power to control meh! ||(need a role named "moderator") for testing purposes||`)
  let user = message.mentions.users.first()
  if(!user) return message.channel.send('Who do you want to warn?')
  let reason = args.slice(1).join(' ')
  if(!reason) return message.channel.send('Why is this person being warned?')
  const key = user.id

  user.warns.ensure(key, [])
  user.warns.push(key, { reason: reason, moderator: message.author.id, caseNum: user.warns.size + 1 ,date: new Date() })
  let warnedEmbed = new Discord.RichEmbed()
    .setTitle('L\'user' + user.tag + 'has been warned!')
    .addField('Reason being', reason)
  const cm = await message.channel.send(warnedEmbed)
  cm.delete(5000)
}

Answer 1

错误似乎是由这个字符串 user.warns.ensure(key, []) 触发的，其中用户的 warns 字段未定义。尝试在 user.warns.ensure(key, []) 之前添加此字符串

console.log(user.warns)

查看用户对象中是否存在警告对象。

如果它不存在，您需要定义警告。 既然有函数.ensure(key, [])，它的结构可能更复杂