从以下元素写入JSON文件夹

Question

我想知道如何从json文件中读/写。

const Discord = require ('discord.js');
const client = new Discord.Client();
const {prefix, token,} = require('./config.json');
const fs = require ('fs');
client.login(token)
client.on('message', message => {
if(message.content.startsWith(prefix + "TC")) { //TC = team create
var args = message.content.split(' ').join(' ').slice(4);
if(!args) return message.channel.send("No")
var TeamCreate = `{"NameTeam": "${args}", "ManagerTeam": ${message.author.id}}`
fs.writeFile("./team.json", TeamCreate, (x) => {
if (x) console.error(x)
})}});

json文件将显示：{"NameTeam": "teste","ManagerTeam": 481117441955463169}

我希望每次我们下订单时，它都会被添加到json文件中。

示例：

1 first order = {"NameTeam": "teste","ManagerTeam": 481117441955463169}
2 second order = {"NameTeam": "teste","ManagerTeam": 481117441955463169}, {"NameTeam": "teste2","ManagerTeam": 1234567890}

Answer 1

据我所知，您想要创建一个包含团队列表的json文件。

实现这一点的简单方法是读取和解析json，对其进行更改，然后字符串化json并更新文件。此外，用字符串生成json非常混乱，可能会导致语法错误，而在javascript中，将js对象转换为json就像执行JSON.stringify(javascriptObject)一样简单

试试这样的东西：

const Discord = require('discord.js');
const client = new Discord.Client();
const { prefix, token, } = require('./config.json');
const fs = require('fs');
client.login(token)
client.on('message', message => {
if (message.content.startsWith(prefix + "TC")) { //TC = team create
var args = message.content.split(' ').join(' ').slice(4);
if (!args) return message.channel.send("No")
var team = {
NameTeam: args,
ManagerTeam: message.author.id
}
fs.readFile("./team.json", (err, data) => {
if (!err && data) {
var parsedJson;
try {
parsedJson = JSON.parse(data);
//Make sure the parsedJson is an array
if (!(parsedJson instanceof Array)) {
parsedJson = [];
}
}
catch (e) {
console.log("Couldn't parse json.");
parsedJson = [];
}
finally {
//Add the newly created team to parsedJson
parsedJson.push(team);
//Write file, stringifying the json.
fs.writeFile("./team.json", JSON.stringify(parsedJson), (err) => {
if (!err) {
console.log("Successfully created team.");
}
else {
console.log("Error writing to file.")
}
});
}
}
else {
console.log("Error reading json");
}
});
}
});

希望这能有所帮助，祝你好运。