&#39;Observable&#39; 类型不存在属性 &#39;timeout&#39;<Object> &#39;

Question

我正在尝试从 5 升级到 Angular 6 并收到此错误：

src/app/services/http.service.ts(17,14) 中的错误：错误 TS2339：“可观察”类型上不存在属性“超时”。

我在 http.service.ts 中的代码：

import { throwError as observableThrowError,  Observable } from 'rxjs';
import { Injectable } from '@angular/core';
import { environment } from "environments/environment";
import { AppService } from 'app/app.service';
import { HttpClient } from '@angular/common/http';

@Injectable()
export class HttpService {

    private baseUrl = environment.apiUrl;

    constructor(private http: HttpClient, private appService: AppService) { }

    public get(endpoint: string): Observable<any>{
        return this.http.get(this.baseUrl + endpoint)
            .timeout(this.appService.timeoutInterval)
            .retryWhen(error => error.delay(this.appService.waitInterval)
                .take(this.appService.numberOfRetries)
                .concat(observableThrowError(new Error())))
            .share();
    }
}

我在这里缺少什么？

Answer 1

自 Rxjs 6 起，您必须添加一个.pipe ，然后在其中使用任何运算符。

像这样改变你的实现：

import { throwError ,  Observable, timer } from 'rxjs';
import { Injectable } from '@angular/core';
import { environment } from "environments/environment";
import { AppService } from 'app/app.service';
import { HttpClient } from '@angular/common/http';

import { 
  timeout,
  retryWhen,
  take,
  concat,
  share,
  delayWhen
} from 'rxjs/operators';

@Injectable()
export class HttpService {

  private baseUrl = environment.apiUrl;

  constructor(
    private http: HttpClient, 
    private appService: AppService
  ) {}

  public get(endpoint: string): Observable < any > {
    return this.http.get(this.baseUrl + endpoint)
      .pipe(
        timeout(2500),
        retryWhen(errors =>
          errors.pipe(
            delayWhen(val => timer(val * 1000))
          )
        ),
        take(2),
        concat(throwError('This is an error!')),
        share()
      );
  }
}

PS：我冒昧更改了您的AppService. 引用我自己的实现，因为您没有共享您的AppService代码。

Answer 2

现在，您应该使用debounceTime而不是timeout 。 例如，来自官方文档：

this.heroes$ = this.searchTerms.pipe(
      // wait 300ms after each keystroke before considering the term
      debounceTime(300),

      // ignore new term if same as previous term
      distinctUntilChanged(),

      // switch to new search observable each time the term changes
      switchMap((term: string) => this.heroService.searchHeroes(term)),
    );

Answer 3

您应该使用 ng update 进行更新 - 请参阅https://blog.angular.io/version-6-of-angular-now-available-cc56b0efa7a4 （向下滚动一点）

根据此链接，这将自动安装rxjs-compat ，它将启用对 RxJs v5 和 v6 的支持

但是，如果需要，您可以手动安装rxjs-compat 。

这将简化 ng5 到 ng6 的转换，然后（可选）稍后在更专注于 RxJ 的任务中将其拉出。

Answer 4

你必须执行命令

npm install rxjs-compat