Node.js + 不和谐.js：无法读取未定义的属性"类"

Question

我有一个变量问题。我正在开发Discord RPG机器人，但遇到了玩家数据问题。当我用控制台启动机器人并发送消息来构建我的统计数据时，控制台会返回

C:UserswilliOneDriveDesktopdiscord-bothomies.js:395
player[id].class = reply;
^
TypeError: Cannot set property 'class' of undefined

我使用以下代码。这是整个程序的一部分。此操作所需的所有文件都存在。

const Discord = require('discord.js');
const { prefix, token } = require('./config.json');
const client = new Discord.Client();
const fs = require('fs');
const player = fs.readFileSync('user.json', 'utf-8');
client.on('message', message => {
var id = message.author.id;
if (player[id] === undefined) {
player[id] = {
username: message.author.username,
class: undefined,
xp: 0,
lvl: 1,
xpReq: 100 + this.lvl * 75,
hp: 0,
maxHp: 0,
str: 0,
def: 0,
int: 0,
dex: 0,
luck: 0,
mana: 0,
maxMana: 0,
equip: {
top: undefined,
bottom: undefined,
hand: undefined,
acc1: undefined,
acc2: undefined
},
spellcaster: undefined,
spells: []
};
var authorVerifier = m => m.author.id === id;
var classAnswer = message.channel.createMessageCollector(authorVerifier, { time: 300000, max: 1 });
var classInterpreter = function(reply) {
if (reply !== 'fighter' && reply !== 'adventurer' && reply !== 'mage'
&& reply !== 'healer' && reply !== 'rouge' && reply !== 'tank') {
return message.channel.send('That was not a valid class!');
}
else {
player[id].class = reply;
fs.writeFileSync('user.json', player[id], (err) => {
if (err) throw err;
});
}
}
classAnswer.on('collect', m => classInterpreter(m.content));
}
});

我试着用message.author.id替换id，但没有成功。请帮忙！

Answer 1

您可以通过将播放器数组传递给classInterpreter来解决它函数，并使用它来设置player[id].class值。

classAnswer.on('collect', m => classInterpreter(m.content, player));