我如何确保此人从商店购买了某件商品？

Question

我已经遇到这个问题好几个小时了，我无法确保人们在与宠物进行活动之前已经购买了宠物。

它没有显示错误，但它不能正常工作，我不知道如何引用玩家库存中的某个项目，因为我正在尝试实现一个宠物功能，你可以在其中与其他人打宠物，也将能够喂养你的宠物，并且会有宠物比赛和统计等活动。

const db = require('quick.db');

const Discord = require('discord.js');

module.exports = {

  name: "fight",

  description: "fight someone",

  async run(client, message, args) {

    let target = message.mentions.users.first();

    if (!target) return message.channel.send('please provide a person to fight');

    let user = message.author;

    let theitemsofuser = await db.fetch(message.author.id, {

      items: []

    });

    if (target === user) return message.channel.send('You can\'t fight yourself!')

    if (db.has(user.id + !'.items.hamster')) return message.channel.send('you need a pet to fight');

    if (db.has(user.id + !'.items.dog')) return message.channel.send('you need a pet to fight');

    if (db.has(user.id + !'.items.cat')) return message.channel.send('you need a pet to fight');

    if (db.has(target.id + !'.items.hamster')) return message.channel.send('your opponent needs a pet to fight');

    if (db.has(target.id + !'.items.dog')) return message.channel.send('your opponent needs a pet to fight');

    if (db.has(target.id + !'.items.cat')) return message.channel.send('your opponent needs a pet to fight');

    message.channel.send('your all good!')

  }

}

Answer 1

您的字符串连接错误。target.id 之后的字符串前不应有感叹号。如果这样做，它将连接真值，转换为字符串，因此在本例中为“false”。你现在拥有的（坏的）'test' + !'string' // >> 'testfalse'你需要什么（好）'test' + 'string' // >> 'teststring'如果你只是删除它应该工作！来自 db.has

Answer 2

试试这个结构async run(client, message, args) {  ...  const match = {     userPet : "",    targetPet : ""  }  ["hamster","dog","cat"].forEach(pet => {    if (db.has(user.id.items[pet])) match.userPet = pet    if (db.has(target.id.items[pet])) match.targetPet = pet   });  if (!match.userPet) { message.channel.send('You need a pet to fight'); return }  if (!match.targetPet) {message.channel.send('Your opponent needs a pet to fight'); return; }  message.channel.send('your all good!')}

Answer 3

我用这段代码修复了它：const Discord = require('discord.js');module.exports = {name:"fight",description:"fight someone",async run (client, message, args){let target = message.mentions.users.first();if(!target)return message.channel.send('please provide a person to fight');let user = message.author;let theitemsofuser = await db.fetch(message.author.id, { items: []}); if(target === user) return message.channel.send('You can\'t fight yourself!')if(!db.has(user.id + '.items', 'hamster'))return message.channel.send('you need a pet to fight');if(!db.has(user.id + '.items', 'dog'))return message.channel.send('you need a pet to fight');if(!db.has(user.id + '.items', 'cat'))return message.channel.send('you need a pet to fight');if(!db.has(target.id + '.items', 'hamster'))return message.channel.send('your opponent needs a pet to fight');if(!db.has(target.id + '.items', 'dog'))return message.channel.send('your opponent needs a pet to fight');if(!db.has(target.id + '.items', 'cat'))return message.channel.send('your opponent needs a pet to fight');message.channel.send('your all good!')}}```Fixes: I used !db.has(user.id + '.items', 'dog') return message.channel.send('you dont have a dog at the moment') Instead of db.has(user.id + '.items', 'dog') return message.channel.send('you dont have a dog at the moment')