NullInjectorError：沒有 AngularFireAnalytics 的提供者！ 角 8

Question

運行“npm test”時，我收到此錯誤：

NullInjectorError: StaticInjectorError(DynamicTestModule)[ComparePageComponent -> AngularFireAnalytics]: StaticInjectorError(Platform: core)[ComparePageComponent -> AngularFireAnalytics]: NullInjectorError: 沒有 AngularFireAnalytics 的提供者！ 錯誤屬性: 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);
          });
      }
}

比較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', {});
}

你知道缺少什么嗎？

我使用了本教程： https : //www.positronx.io/firebase-authentication-in-angular-8-with-angularfire2/

Answer 1

沒有名為AngularFireAnalytics提供程序。 因此，您需要將providers數組更改為以下內容：

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

然后要使用 firebase 分析，請在組件中執行以下操作：

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

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

檢查這里：

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