我不明白为什么
当我尝试从 OnDiscordReady() 函数访问 this.client 时,它返回未定义。 机器人
错误信息
/home/xcomegax/NCerberus/services/discordS.js:21
Logger.log(`Discord client logged in as ${this.client.user.tag}`);
^
TypeError: Cannot read property 'user' of undefined
at Client.OnDiscordReady (/home/xcomegax/NCerberus/services/discordS.js:21:63)
at Client.emit (events.js:203:15)
at WebSocketConnection.triggerReady (/home/xcomegax/NCerberus/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:125:17)
at WebSocketConnection.checkIfReady (/home/xcomegax/NCerberus/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:141:61)
at GuildCreateHandler.handle (/home/xcomegax/NCerberus/node_modules/discord.js/src/client/websocket/packets/handlers/GuildCreate.js:13:31)
at WebSocketPacketManager.handle (/home/xcomegax/NCerberus/node_modules/discord.js/src/client/websocket/packets/WebSocketPacketManager.js:105:65)
at WebSocketConnection.onPacket (/home/xcomegax/NCerberus/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:333:35)
at WebSocketConnection.onMessage (/home/xcomegax/NCerberus/node_modules/discord.js/src/client/websocket/WebSocketConnection.js:296:17)
at WebSocket.onMessage (/home/xcomegax/NCerberus/node_modules/ws/lib/event-target.js:120:16)
at WebSocket.emit (events.js:198:13)
at Receiver.receiverOnMessage (/home/xcomegax/NCerberus/node_modules/ws/lib/websocket.js:789:20)
at Receiver.emit (events.js:198:13)
at Receiver.dataMessage (/home/xcomegax/NCerberus/node_modules/ws/lib/receiver.js:413:14)
at Receiver.getData (/home/xcomegax/NCerberus/node_modules/ws/lib/receiver.js:352:17)
at Receiver.startLoop (/home/xcomegax/NCerberus/node_modules/ws/lib/receiver.js:138:22)
at Receiver._write (/home/xcomegax/NCerberus/node_modules/ws/lib/receiver.js:74:10)
我正在尝试修复调试的:
const EventEmitter = require('events');
const Logger = require('./loggerS');
const Discord = require('discord.js');
require('dotenv').config();
class discordS extends EventEmitter{
constructor(){
super();
this.client = new Discord.Client();
this.client.on('ready',this.OnDiscordReady);
this.client.on('message',this.OnDiscordMessage);
this.client.login(process.env.DiscordAuthToken);
}
OnDiscordMessage(msg){
if(msg.author == this.client.author) return;
}
OnDiscordReady(){
Logger.log(`Discord client logged in as ${this.client.user.tag}`);
}
}
module.exports = new discordS();
除了我无法访问 this.client 对象之外,一切似乎都正常。 机器人登录然后发出“就绪”信号,然后一切都不起作用
我尝试在构造函数中使用 Object.assign(this, client : new Discord.Client()) 而不仅仅是 this.client =
但这没有任何帮助。
我在这里缺少什么?
最佳答案
您的类方法有自己的 this
作用域。这就是为什么 this.client.user
未定义,因为这个 this
不是类的 this
。要纠正它,您可以在所使用的各个函数的构造函数内 .bind(this)
,或者您可以简单地使用箭头函数来获取类本身的词法 this
const EventEmitter = require('events');
const Logger = require('./loggerS');
const Discord = require('discord.js');
require('dotenv').config();
class discordS extends EventEmitter{
constructor(){
super();
this.client = new Discord.Client();
this.client.on('ready',this.OnDiscordReady);
this.client.on('message',this.OnDiscordMessage);
this.client.login(process.env.DiscordAuthToken);
}
OnDiscordMessage = (msg) => { //arrow function
if(msg.author == this.client.author) return;
}
OnDiscordReady =() => { //arrow function
Logger.log(`Discord client logged in as ${this.client.user.tag}`);
}
}
module.exports = new discordS();
关于node.js - 类型错误 : Cannot read property 'user' of undefined,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/58387582/