JSON 数据库的排行榜命令

Question

我有一个等级系统，代码如下，它使用 JSON 数据库对数据进行排序，如下所示{"626916199783071750":{"xp":94,"level":12} 我想创建一个命令，按等级顺序显示所有成员的排行榜。 代码

nst Discord = require('discord.js');
const client = new Discord.Client();
const config = require('./config.json');
const fs = require("fs");
let db = JSON.parse(fs.readFileSync("./database.json", "utf8"));

client.on("message", message => {
    if (message.author.bot) return; // ignore bots

    // if the user is not on db add the user and change his values to 0
    if (!db[message.author.id]) db[message.author.id] = {
        xp: 0,
        level: 0
      };
    db[message.author.id].xp++;
    let userInfo = db[message.author.id];
    if(userInfo.xp > 100) {
        userInfo.level++
        userInfo.xp = 0
        message.reply("Congratulations, you level up")
    }
    const args = message.content.slice(config.prefix.length).trim().split(/ +/g);
    const cmd = args.shift().toLowerCase();
    if(cmd === "rank") {
        let userInfo = db[message.author.id];
        let member = message.mentions.members.first();
        let embed = new Discord.RichEmbed()
        .setColor(0x4286f4)
        .addField("Level", userInfo.level)
        .addField("XP", userInfo.xp+"/100");
        if(!member) return message.channel.sendEmbed(embed)
        let memberInfo = db[member.id]
        let embed2 = new Discord.RichEmbed()
        .setColor(0x4286f4)
        .addField("Level", memberInfo.level)
        .addField("XP", memberInfo.xp+"/100")
        message.channel.sendEmbed(embed2)
    }
    fs.writeFile("./database.json", JSON.stringify(db), (x) => {
        if (x) console.error(x)
      });
})

client.login(config.token)

顺便说一句，我正在使用 discord.js v12+

Answer 1

如果您需要按照您提供的方式对 JSON 数据进行排序，这里是解决方案

// Your database
const members = [
  {"626916199783071750":{"xp":94,"level":7}},
  {"626916199783071750":{"xp":94,"level":22}},
  {"626916199783071750":{"xp":94,"level":12}}
];

// Sort function
members.sort(function(a, b) {
  const keyA = a[Object.keys(a)[0]].level,
        keyB = b[Object.keys(a)[0]].level;
  // Compare
  // (swap -1 and 1 to change sort order)
  if(keyA < keyB) return -1;
  if(keyA > keyB) return 1;
  return 0;
});
// Result
console.log(members);