我的 discord.js 代码说它不能 output 一个空消息，即使它不应该是空的

Question

I have a discord.js bot and I wanted to add an info command. I told it to get the user info and it spat this out in the console:

(node:15012) UnhandledPromiseRejectionWarning: DiscordAPIError: Cannot send an empty message
    at RequestHandler.execute (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:154:13)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async RequestHandler.push (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:39:14)
(node:15012) 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:15012) [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.
(node:15012) UnhandledPromiseRejectionWarning: DiscordAPIError: Cannot send an empty message
    at RequestHandler.execute (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:154:13)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async RequestHandler.push (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:39:14)
(node:15012) 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: 2)
(node:15012) UnhandledPromiseRejectionWarning: DiscordAPIError: Cannot send an empty message
    at RequestHandler.execute (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:154:13)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async RequestHandler.push (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:39:14)
(node:15012) 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: 3)
(node:15012) UnhandledPromiseRejectionWarning: DiscordAPIError: Cannot send an empty message
    at RequestHandler.execute (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:154:13)
    at processTicksAndRejections (internal/process/task_queues.js:97:5)
    at async RequestHandler.push (C:\Users\jakub\OneDrive\Počítač\da discord bot\node_modules\discord.js\src\rest\RequestHandler.js:39:14)
(node:15012) 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: 4)

And this is my code

 function info(){
  message.channel.send(message.mentions.users);

  else if (command === "info"){
    if (!args[0]){
        return message.channel.send("You Need to provide an argument");
    }
    else if (message.guild.member(message.mentions.users.length === 0)){
        return message.channel.send("You Need to Ping someone!");
    }

    message.channel.send(info.username);
    message.channel.send(info.createdAt);
    message.channel.send(info.id);
    message.channel.send(info.joinedAt);
}



);

How can I 1. improve my code, 2. help fix the problem?

Answer 1

Let's just pretend I didn't see that else if going for a walk in your code block.

function info() {
  message.channel.send(message.mentions.users);

  if (command === "info") {
    if (!args) { // [0] is useless here
      return message.reply("You Need to provide an argument");
    } else if (!message.mentions.users) {
      return message.reply("You Need to Ping someone!");
    }

    message.channel.send(`${info.username}\n${info.createdAt}\n${info.id}\n${info.joinedAt}`)

  }
};

I'll add that I did not understand a thing about your code. Here's what I changed:

• tried to correct SyntaxErrors
• remove redundant stuff
• did not send messages multiple times: it's because of ratelimits, and most importantly slowmodes

If that's the only code concerned by the error you gave, there's a high chance that yes, you're trying to send empty messages: where's that info even defined?