catch 不工作 - promise 被拒绝，原因是“#<Collection>”

Question

我正在尝试编写一个不和谐的机器人，现在它是一个结婚的命令。

除一件事外，一切正常。在 awaitReactions 函数中，我有 10 秒的时间，在这段时间之后我得到这个错误：

node:internal/process/promises:246 triggerUncaughtException(err, true /* fromPromise */); [UnhandledPromiseRejection: This error originated either by throwing inside of a n async function without a catch block, or by rejecting a promise which was not handled with .catch(). The promise rejected with the reason "#".] { code: 'ERR_UNHANDLED_REJECTION' }

我不明白为什么会这样，我在函数末尾有 .catch()，理论上一切都应该正常工作。

为什么 .catch() 对我的情况不起作用？可能是什么问题？

const { Command } = require('discord.js-commando');
const db = require("quick.db");


module.exports = class MarryCommand extends Command {
  constructor(client) {
    super(client, {
      name: 'marry',
      memberName: 'marry',
      group: 'test',
      description: 'Marry the mentioned user',
      guildOnly: true,
      args: [
        {
          key: 'userToMarry',
          prompt: 'Please select the member you wish to marry.',
          type: 'member'
        }
      ]
    });
  }

  run(message, { userToMarry }) {
    const exists = db.get(`${message.author.id}.user`);
    const married = db.get(`${userToMarry.id}.user`);
    if (!userToMarry) {
      return message.channel.send('Please try again with a valid user.')}
    if (exists == message.author.id) {
      return message.channel.send('You are already married!')}
    if (married == userToMarry.id) {
      return message.channel.send('This user is already married!')}
    if (userToMarry.id == message.author.id) {
      return message.channel.send('You cannot marry yourself!');
    }
    if (exists != message.author.id && married != userToMarry.id) {
    message.channel.send(`**Important announcement!**
    
    ${message.author} makes a marriage proposal ${userToMarry}
    
    Are you ready to get married?`).then(message => {
      message.react('').then(() => message.react(''));
    

      message.awaitReactions((reaction, user) => user.id == userToMarry.id && (reaction.emoji.name == '' || reaction.emoji.name == ''),
        { max: 1, time: 10000, errors: ['time'] })
      .then(collected => {
        const reaction = collected.first();
        if (reaction.emoji.name === '') {
      return message.channel.send('I think **no**...')}
    if (reaction.emoji.name === '') {
      db.set(message.author.id, { user: message.author.id, partner: userToMarry.id });
      db.set(userToMarry.id, { user: userToMarry.id, partner: message.author.id });
    message.channel.send(`${message.author} and ${userToMarry} now married!!`)
      .catch(() => {
           message.reply('No reaction after 10 seconds, operation canceled');
        });
      }
  });
});
}}};

Answer 1

这里的错误是每个 then 链都应该有一个 catch 块。你错过了两个 catch 块。解决方案是将 catch 块添加到所有 then 链，或者您可以将所有 then 链连接成一个大链，最后使用一个 catch 块

方法一

const { Command } = require("discord.js-commando");
const db = require("quick.db");

module.exports = class MarryCommand extends Command {
    constructor(client) {
        super(client, {
            name: "marry",
            memberName: "marry",
            group: "test",
            description: "Marry the mentioned user",
            guildOnly: true,
            args: [
                {
                    key: "userToMarry",
                    prompt: "Please select the member you wish to marry.",
                    type: "member",
                },
            ],
        });
    }

    run(message, { userToMarry }) {
        const exists = db.get(`${message.author.id}.user`);
        const married = db.get(`${userToMarry.id}.user`);
        if (!userToMarry) {
            return message.channel.send("Please try again with a valid user.");
        }
        if (exists == message.author.id) {
            return message.channel.send("You are already married!");
        }
        if (married == userToMarry.id) {
            return message.channel.send("This user is already married!");
        }
        if (userToMarry.id == message.author.id) {
            return message.channel.send("You cannot marry yourself!");
        }
        if (exists != message.author.id && married != userToMarry.id) {
            message.channel
                .send(
                    `**Important announcement!**
    
    ${message.author} makes a marriage proposal ${userToMarry}
    
    Are you ready to get married?`
                )
                .then((message) => {
                    message.react("")
          .then(() => message.react(""))
          .catch(()=>{
            //code
          });
                    message.awaitReactions((reaction, user) =>
                                user.id == userToMarry.id && (reaction.emoji.name == "" || reaction.emoji.name == ""),
                            { max: 1, time: 10000, errors: ["time"] }
                        ).then((collected) => {
                            const reaction = collected.first();
                            if (reaction.emoji.name === "") {
                                return message.channel.send("I think **no**...");
                            }
                            if (reaction.emoji.name === "") {
                                db.set(message.author.id, {
                                    user: message.author.id,
                                    partner: userToMarry.id,
                                });
                                db.set(userToMarry.id, {
                                    user: userToMarry.id,
                                    partner: message.author.id,
                                });
                                message.channel
                                    .send(`${message.author} and ${userToMarry} now married!!`)
                                    .catch(() => {
                                        message.reply(
                                            "No reaction after 10 seconds, operation canceled"
                                        );
                                    });
                            }
                        }).catch(()=>{
              //code
            });
                }).catch(()=>{
          //code
        });
        }
    }
};

方法二

const { Command } = require("discord.js-commando");
const db = require("quick.db");

module.exports = class MarryCommand extends Command {
    constructor(client) {
        super(client, {
            name: "marry",
            memberName: "marry",
            group: "test",
            description: "Marry the mentioned user",
            guildOnly: true,
            args: [
                {
                    key: "userToMarry",
                    prompt: "Please select the member you wish to marry.",
                    type: "member",
                },
            ],
        });
    }

    run(message, { userToMarry }) {
        const exists = db.get(`${message.author.id}.user`);
        const married = db.get(`${userToMarry.id}.user`);
        if (!userToMarry) {
            return message.channel.send("Please try again with a valid user.");
        }
        if (exists == message.author.id) {
            return message.channel.send("You are already married!");
        }
        if (married == userToMarry.id) {
            return message.channel.send("This user is already married!");
        }
        if (userToMarry.id == message.author.id) {
            return message.channel.send("You cannot marry yourself!");
        }
        if (exists != message.author.id && married != userToMarry.id) {
            message.channel
                .send(
                    `**Important announcement!**
    
    ${message.author} makes a marriage proposal ${userToMarry}
    
    Are you ready to get married?`
                )
                .then((message) => {
          
                    message.react("")
          .then(() => message.react(""))
          .catch(()=>{
            //code
          });
                    return message.awaitReactions((reaction, user) =>
                                user.id == userToMarry.id && (reaction.emoji.name == "" || reaction.emoji.name == ""),
                            { max: 1, time: 10000, errors: ["time"] }
                        )
                })
        .then((collected) => {
          const reaction = collected.first();
          if (reaction.emoji.name === "") {
            return message.channel.send("I think **no**...");
          }
          if (reaction.emoji.name === "") {
            db.set(message.author.id, {
              user: message.author.id,
              partner: userToMarry.id,
            });
            db.set(userToMarry.id, {
              user: userToMarry.id,
              partner: message.author.id,
            });
            return message.channel
              .send(`${message.author} and ${userToMarry} now married!!`)
          }
        })
        .catch(()=>{
          message.reply(
            "No reaction after 10 seconds, operation canceled"
          );
        });
        }
    }
};

catch 不工作 - promise 被拒绝，原因是“#<Collection>”

catch not working - The promise rejected with the reason "#<Collection>"

javascript

node.js

discord.js