保存 json 文件时遇到困难

Question

我有一个连接到 api 的函数，并为许多不同的项目提取 particle、name 和 community_price。它运行良好，但现在我希望它将数据保存在 json 文件中。它应该是这样的：

[
    {
        "particle": "xxx",
        "name": "xxx",
        "community_price": "xxx"
    },
    {
        "particle": "xxx",
        "name": "xxx",
        "community_price": "xxx"
    },
    {
        "particle": "xxx",
        "name": "xxx",
        "community_price": "xxx"
    }
]

我花了很多时间玩 fs.writeFileSync 但不幸的是 none 由于我对 js 的了解不足，我的尝试没有奏效。欢迎任何帮助，将选择最佳答案。提前致谢！

函数如下：

function get_community_price(){

  let url = 'https://example.com/api/IGetPrices/v4?key=' + backpackkey;
  var massive;
  let quality = '5';
  request({url:url, json:true},  function(err, res, body){
        if (err) console.log(err);

        massive = body.response.items;
        console.log('recieved comminty prices')
        for(let i = 0; i < data.length; i += 1){

          let get_json = other.urltojson(data[i].ApiLink);
          let particle = get_json.particle
          let name = data[i].BuyLink;
              name = name.replace(/(\/Tradable).*/, '');
              name = name.replace(/.*(\/)/, '');
              name = name.replace(/\%20/g, ' ');
              name = name.replace(/\%27/g, '\'')

          let community_price = massive[name].prices[quality].Tradable.Craftable[particle].value;
          data[i].BuyPrice = community_price;

        }
         CreateOrders()    
      });
}

这是我认为应该的，但仍然不起作用。

function get_community_price(){

  let url = 'https://example.com/api/IGetPrices/v4?key=' + backpackkey;
  var massive;
  let quality = '5';
  request({url:url, json:true},  function(err, res, body){
        if (err) console.log(err);

        massive = body.response.items;
        console.log('recieved comminty prices')
        for(let i = 0; i < data.length; i += 1){

          let get_json = other.urltojson(data[i].ApiLink);
          let particle = get_json.particle
          let name = data[i].BuyLink;
              name = name.replace(/(\/Tradable).*/, '');
              name = name.replace(/.*(\/)/, '');
              name = name.replace(/\%20/g, ' ');
              name = name.replace(/\%27/g, '\'')

          let community_price = massive[name].prices[quality].Tradable.Craftable[particle].value;
          data[i].BuyPrice = community_price;

          var priceLog = [];

          priceLog.push({particle, name, community_price});
        }

  fs.writeFileSync('./app/comPrice.json', JSON.stringify(priceLog, null, 4));
  console.log('Fresh community price saved.');

  CreateOrders()    
  });
}

Answer 1

按照 official documentation 说明 writeFileSync 可以这样使用：

const fs = require("fs");
const json = { /* Big object of whatever */ };
const path = "path/file.json";
fs.writeFileSync(path, JSON.stringify(json));

我在你的代码中看不到任何内容 fs.writeFileSync，但我想这就是你想要做的。

保存 json 文件时遇到困难

Difficulties in saving a json file

javascript

json

file

fs

node.js