NullInjectorError：没有 AngularFireAnalytics 的提供者！角 8

Question

运行“npm test”时，我收到此错误：

NullInjectorError: StaticInjectorError(DynamicTestModule)[ComparePageComponent -> AngularFireAnalytics]: StaticInjectorError（平台：核心）[ComparePageComponent -> AngularFireAnalytics]： NullInjectorError：没有 AngularFireAnalytics 的提供者！ 错误属性： Object({ ngTempTokenPath: null, ngTokenPath: [ 'ComparePageComponent', Function ] })

app.module.ts

import {AngularFireModule} from "@angular/fire";
import {AngularFireAnalyticsModule, AngularFireAnalytics} from "@angular/fire/analytics";

@NgModule({
   imports: [
   .....
       AngularFireModule.initializeApp(environment.firebase),
       AngularFireAnalyticsModule,
   ],
   providers: [
      AngularFireAnalytics,
      ...fromServices.services,
   ],

firebase.service.ts

import { Injectable } from '@angular/core';
import { AngularFireAnalytics } from "@angular/fire/analytics";

@Injectable({ providedIn: 'root' })
export class FirebaseService {

    constructor(private analytics: AngularFireAnalytics) {}

      public logEvent(eventName: string, params: {}) {

          this.analytics.logEvent(eventName, params).then( res => {
             console.log('event registered', eventName, params);
          })
          .catch(error => {
             console.log('error', error.message);
          });
      }
}

比较-page.component.ts

import {Component, OnDestroy, OnInit} from '@angular/core';
import {FirebaseService} from "../../../services/firebase.service";

export class ComparePageComponent implements OnInit, OnDestroy {

constructor(private firebaseService: FirebaseService) {
     this.firebaseService.logEvent('test', {});
}

您知道缺少什么吗？

我用过这个教程：https://www.positronx.io/firebase-authentication-in-angular-8-with-angularfire2/

Answer 1

没有名为AngularFireAnalytics 的提供程序。因此，您需要将providers 数组更改为以下内容：

  providers: [
      ...fromServices.services,
   ],

然后要使用 Firebase 分析，请在组件中执行以下操作：

import { AngularFireAnalytics } from '@angular/fire/analytics';

constructor(analytics: AngularFireAnalytics) {
  analytics.logEvent('custom_event', { ... });
}

在这里查看：

https://github.com/angular/angularfire/blob/master/docs/analytics/getting-started.md