Question

我正在尝试在Angular版本7上设置服务，但是我在res.json()上遇到问题，该问题引发了错误Property 'json' does not exist on type 'Object'。这是我的服务代码：

import {Injectable} from '@angular/core';
import {HttpClient} from '@angular/common/http';
import {Observable} from "rxjs";
import 'rxjs/add/operator/map';
import { map } from 'rxjs/operators';

import {
    SVCParameters,
    SVCResult
} from "./types";

const SERVER_URL: string = 'api/';

@Injectable()
export class IrisService {

    constructor(private http: HttpClient) {
    }

    public trainModel(svcParameters: SVCParameters): Observable<SVCResult> {
        return this.http.post(`${SERVER_URL}train`, svcParameters).pipe(map(res => res.json()));

    }
}

以下是我的types.ts代码：

export class SVCParameters {
C: number = 2.0;
}

export class SVCResult{
accuracy: number;
}

Answer 1

Angular 7 HttpClientModule，默认情况下返回响应为 JSON ，无需映射响应，因为res.json()只需删除管道运算符即可。一切都会正常。

import {Injectable} from '@angular/core';
import {HttpClient} from '@angular/common/http';
import {Observable} from "rxjs";
import 'rxjs/add/operator/map';
import { map } from 'rxjs/operators';

import {
    SVCParameters,
    SVCResult
} from "./types";

const SERVER_URL: string = 'api/';

@Injectable()
export class IrisService {

    constructor(private http: HttpClient) {
    }

    public trainModel(svcParameters: SVCParameters): Observable<SVCResult> {
        return this.http.post(`${SERVER_URL}train`, svcParameters);

    }
}

无法映射发布响应Angular 7

1 个答案: