Question

我必须通过provider获取json并将其保存在键为“ id”且其他值为对象的地图中。这是我的json：

{
    "data": {
        "stores": [{
                "description": "a1",
                "name": "b1",
                "id": ["_0010008"]
            },
            {
                "description": "a2",
                "name": "b2",
                "id": ["_0010007"]
            }
        ]
    },
    "message": "",
    "status": "ok"
}

这是我的提供商。

import {
    HttpClient
} from '@angular/common/http';
import {
    HttpClientModule
} from '@angular/common/http'
import {
    Injectable
} from '@angular/core';
import 'rxjs/add/operator/map';
import {
    JsonStoresDataInterface
} from './../../providers/stores/stores';

/*
  Generated class for the StoresProvider provider.

  See https://angular.io/guide/dependency-injection for more info on providers
  and Angular DI.
*/
@Injectable()
export class StoresProvider {
    private JsonStoresData = new Map([]);
    defaultKey = "_0010008";
    url_request = "path/to/json";

    constructor(public http: HttpClient) {}

    getStoresRemote(s) {
        this.http.get < JsonStoresDataInterface > (this.url_request).subscribe(data => {
            var json = data.data;
            for (var store of json.stores) {
                var str = id[0];
                var arr = {
                    name: store.name,
                    description: store.description,
                }

                this.JsonStoresData.set(str, arr)
            }
        });

        console.log(this.JsonStoresData);
        console.log(this.JsonStoresData.get(this.defaultKey));
    }
}

console.log（this.JsonStoresData）可以：

https://i.stack.imgur.com/k1ssA.png

console.log（this.JsonStoresData.get（this.defaultKey））不合适：

Undefined

怎么了？以及如何通过地图键获取对象？

为什么这是重复的？我没有看到我的错误，并在“ answer post”中将其修复

如何通过地图键获取对象？

0 个答案: