如何搜索和returnjson对象？

Question

我需要搜索 return 一个 json 对象 children，遵循 json children 值。

这是我写的工作代码（带回正确的对象）：

const sites = [
  {
    name: "Lightinthebox WW",
    site_url: "https://lightinthebox.com/",
    domain: "lightinthebox.com",
  },
  {
    name: "Aliexpress WW",
    site_url: "https://aliexpress.com/",
    domain: "aliexpress.com",
  },
  {
    name: "Dx WW",
    site_url: "http://dx.com/",
    domain: "dx.com",
  }
];

var site = "aliexpress.com";
const foundSite = sites.find(s => site.includes(s.domain)); 
//return: {name: "Aliexpress WW", site_url: "https://aliexpress.com/",    domain: "aliexpress.com"}

现在，我有一个不同的 JSON:

const sites = {"All":{"5631":{"id":5631,"name":"Lightinthebox WW","site_url":"https:\/\/lightinthebox.com\/","domain":"lightinthebox.com"},"6115":{"id":6115,"name":"Aliexpress WW","site_url":"https:\/\/aliexpress.com\/","domain":"aliexpress.com"},"7077":{"id":7077,"name":"Dx WW","site_url":"http:\/\/dx.com\/","domain":"dx.com","13318":{"id":13318,"name":"GearBest WW","site_url":"https:\/\/gearbest.com\/","domain":"gearbest.com"}}};

我尝试做同样的事情，但我有“sites.find 不是函数”

你能看出原因吗？试图寻找一种方法来带回正确的对象（搜索域："aliexpress.com" 然后带回所有对象 "{"id":6115,"name":"Aliexpress WW","site_url":"https://aliexpress.com/","域":"aliexpress.com"}")

谢谢

Answer 1

Array.prototype.find() 是一个数组方法，在您的第一个示例中可以在 sites 上使用，因为它是一个数组，但在您的第二次尝试中，您试图在对象上调用它。

在这种情况下，您可以使用 Object.values() 到 return 顶级对象的 All 属性中的值对象数组，并使用 .find() 关于那个。

（在这种情况下这不是 JSON related, but knowing the methods available for the class you are dealing with; Array vs Object）

const sites = {
  "All": {
    "5631": {
      "id": 5631, "name": "Lightinthebox WW", "site_url": "https:\/\/lightinthebox.com\/", "domain": "lightinthebox.com"
    },
    "6115": {
      "id": 6115, "name": "Aliexpress WW", "site_url": "https:\/\/aliexpress.com\/", "domain": "aliexpress.com"
    },
    "7077": {
      "id": 7077, "name": "Dx WW", "site_url": "http:\/\/dx.com\/", "domain": "dx.com"
    },
    "13318": {
      "id": 13318, "name": "GearBest WW", "site_url": "https:\/\/gearbest.com\/", "domain": "gearbest.com"
    }
  }
};

const site = "aliexpress.com";
const foundSite = Object.values(sites.All).find(s => site.includes(s.domain));

console.log(foundSite);

如何搜索和returnjson对象？

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