我如何确保该人拥有商店中的特定商品？

Question

这个问题已经有好几个小时了，我无法确定人们在与它进行活动之前是否已经购买了宠物。

它没有显示错误，但无法正常工作，而且我不知道如何引用玩家库存中的某个物品，因为我正在尝试实现一个宠物功能，您可以在其中与其他宠物战斗人，也将能够喂养你的宠物，还会有宠物比赛和统计数据等活动。

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 后面的字符串前不能有感叹号。

如果您这样做，它将连接真值，转换为字符串，因此在这种情况下为“假”。

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可以工作！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')