一直给我未处理的承诺拒绝警告，我无法发现错误

Question

这是我的代码，我有一个命令处理程序btw.

const Discord = require('discord.js');
const bot = new Discord.Client();
const token = 'hidden';
const sqlite = require('sqlite3').verbose();
const dayno = '0';
const PREFIX = '$';
const fs = require('fs');

bot.on('message', (message) => { 
let userid = message.author.id;
if (message.author.bot || !message.content.startsWith(PREFIX)) return;
if(message.author.bot)return;
let db = new sqlite.Database('./database.db', sqlite.OPEN_READWRITE );

bot.commands = new Discord.Collection();
const commandFiles = fs.readdirSync('./commands/').filter(file => file.endsWith('.js'));
for(const file of commandFiles){
const command = require(`./commands/${file}`);
bot.commands.set(command.name, command);

if (message.author.bot || !message.content.startsWith(PREFIX)) 
return;
let args = message.content.substring(PREFIX.length).split(" ");
switch(args[0]){
case 'help':
bot.commands.get('help').execute(message, args);    
break;
case 'getreports':
if(message.member.roles.cache.find(r => r.name
=== "Developers")) return message.channel('You are not authorized to use this command.')
bot.commands.get('getreports').execute(message, args);         
break;
case 'getreportsof':

if(message.member.roles.cache.find(r => r.name
=== "Developer")){
bot.commands.get('getreportsof').execute(message, args);   
}else{
message.reply('You are not authorized to use this command.')
}    
break;

};
};

});
bot.on('ready', () =>{
console.log('Duncan Online');
bot.user.setActivity('$help', {type: "LISTENING"}).catch(console.error);
let db = new sqlite.Database('./database.db', sqlite.OPEN_READWRITE | sqlite.OPEN_CREATE)
db.run('CREATE TABLE IF NOT EXISTS data(userid INTEGER NOT NULL, reports INTEGER NOT NULL)')
});

bot.login(token);

这是错误：

(node:12456) UnhandledPromiseRejectionWarning: DiscordAPIError: Unknown Message
at RequestHandler.execute (C:UsersHP_OmenDesktopTestingnode_modulesdiscord.jssrcrestRequestHandler.js:170:25)
at processTicksAndRejections (internal/process/task_queues.js:97:5)
(node:12456) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a 
catch block, or by rejecting a promise which was not handled with .catch(). To terminate the node process on unhandled promise rejection, use the CLI flag 
`--unhandled-rejections=strict` (see https://nodejs.org/api/cli.html#cli_unhandled_rejections_mode). (rejection id: 1)
(node:12456) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.

Answer 1

我在您提供的代码中看不到任何会直接导致错误的内容。这很可能来自你的命令。

对于每种开关情况，都要使用这样的东西：

bot.commands.get('help').execute(message, args).catch(console.error)

catch将帮助您查找错误。如果没有，请将.catch(console.error)添加到命令中调用异步函数(返回promise的函数(的任何位置。

---

我个人发现使用async函数和await而不是then和catch更容易阅读，所以你也可以将代码重构为这样的东西：

// commands/help.js
module.exports = {
name: 'help',
async execute(message, args) {
// note how I use await here 
await message.channel.send('some useful help message');
}
};
// your main file (probably index.js or something)
bot.on('message', async (message) => {
try {
// rest of code...
switch (args[0]) {
case 'help':
// use await here as well so that the errors get caught
await bot.commands.get('help').execute(message, args);
break;
// rest of commands
}
} catch (error) {
// log all errors
console.error(error)
}
});

---

有关未经处理的承诺拒绝的更多信息，请参阅此答案。

Answer 2

我忘记关闭这个：

for(const file of commandFiles){
const command = require(`./commands/${file}`);
bot.commands.set(command.name, command);

它的工作原理如下：

for(const file of commandFiles){
const command = require(`./commands/${file}`);
bot.commands.set(command.name, command);
}

不管怎样，我感谢你的回答