[英]How to get object of object in JSON API response?
I'm using Ionic with Angular. I have a JSON API response and I want to get the items of an object inside an object, in this case, author items.我将 Ionic 与 Angular 一起使用。我有一个 JSON API 响应,我想在 object 中获取 object 的项目,在本例中为作者项目。
JSON API response JSON API 回复
{
x{
**authors**:{
auth-sara-rts-2022:
Code: "rts"
Contact:{
email:"xx@gmail.com"
phone:"0.."}
[[Prototype]]: Object
auth-sami-sgs-2022:
Code: "sgs"
Contact:{
email:"xx@gmail.com"
phone:"0.."}
[[Prototype]]: Object
[[Prototype]]: Object
}
[[Prototype]]: Object},
y{
yy: "text"
[[Prototype]]: Object}
[[Prototype]]: Object}
}
Here is how to call the API in ts file下面是在ts文件中调用API的方法
callAPI(body: any, header: any): Observable<any> {
return this.http.post(API_URL+API_ENDPOINT,body,header);
}
postAPI(body:any,header) {
this.callAPI(body, header).subscribe(
(data) => { console.log(data.x.authors);
}
);
}
I get a list of authors, and I'd like to access the items in each author's collection (code and contact).我得到了一份作者列表,我想访问每个作者收藏中的项目(代码和联系方式)。
I tried this code, but it returned an undefined value.我试过这段代码,但它返回了一个未定义的值。
console.log(data.x.authors[0]);
The issue you're having is that you are trying to use Array notation ( data.x.authors[0]
) to access key/value pairs in an Object. In order to transform the authors
Object into an Array, there are multiple approaches.您遇到的问题是您正在尝试使用数组表示法 ( data.x.authors[0]
) 访问 Object 中的键/值对。为了将authors
Object 转换为数组,有多种方法. I would propose Object.entries
, which returns an Array of tuples, each tuple containing the key followed by the value:我会建议Object.entries
,它返回一个元组数组,每个元组包含键和值:
const authors = Object.entries(data.x.authors);
console.log(authors[0]); // ['auth-sara-rts-2022', { Code: 'rts', ... }]
Here are the MDN docs for Object.entries()
: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries以下是Object.entries()
的 MDN 文档: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Object/entries
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