当不应该在 discord.js 命令处理程序中未定义时，无法读取未定义的属性 [英] Cannot read properties of undefined when it shouldn't be undefined in discord.js command handler

问题描述

我用一个简单的ping"命令创建了一个小命令处理程序.命令.但是，尝试访问 message.channel 显示未定义.这是为什么呢?

I created a small command handler with a simple "ping" command. However, trying to access message.channel shows up undefined. Why is this?

./index.js

//Discord, fs, prefix, client etc. declarations

client.commands = new Collection()

const files = fs.readdirSync("./commands").filter(file => file.endsWith(".js")

for (const file of files) {
  const command = require(`./commands/${file}`)
  client.commands.set(command.name, command)
}

client.on("messageCreate", message => {
  const [command, ...args] = message.content.slice(prefix.length).split(/ +/g)
  if (client.commands.has(command) {
    client.commands.get(command).execute(message, client, args)
  }
})

client.login(/*token*/)

./commands/ping.js

module.exports = {
  name: "ping",
  description: "Make me say pong",
  async execute(client, message, args) {
    message.channel.send("Pong!")
  }
}

推荐答案

虽然 Message.channel 可能有效，但 message 不是 Message<的实例/代码>.它实际上是 Client 的一个实例.参数的顺序总是很重要，将它们放在错误的顺序可能会引发 TypeErrors.这里有1个简单的解决方案

While Message.channel may be valid, message is not an instance of Message. It is actually an instance of Client. The order of the arguments always matter, and putting them in the wrong order can throw TypeErrors. There is 1 simple solution here

按正确的顺序排列参数！您可以更改执行或声明

Make the arguments in the right order! You can either change the execution, or the declaration

client.commands.get(command).execute(client, message, args)

这真的很常见，而且发生的不仅仅是向频道发送消息

This is really common and happens for more than sending messages to channels

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