相关疑难解决方法(0)

好吧，我刚刚开始使用 Angular Firebase，我已经挠头两天了。大多数教程主要针对旧版本的 firebase

这是我将身份验证服务注入组件时收到的错误

Uncaught (in promise): NullInjectorError: R3InjectorError(AppModule)[LoginService -> AngularFireAuth -> InjectionToken angularfire2.app.options -> InjectionToken angularfire2.app.options -> InjectionToken angularfire2.app.options]: 
  NullInjectorError: No provider for InjectionToken angularfire2.app.options!
NullInjectorError: R3InjectorError(AppModule)[LoginService -> AngularFireAuth -> InjectionToken angularfire2.app.options -> InjectionToken angularfire2.app.options -> InjectionToken angularfire2.app.options]: 
  NullInjectorError: No provider for InjectionToken angularfire2.app.options!

到目前为止，以下链接没有帮助

链接1 链接2 链接3

应用程序模块.ts

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { HttpClientModule } from '@angular/common/http';

import { LoginService } …

它发生在我第一次编译我的项目时。

显示这个问题：

 Module '".../node_modules/@angular/fire/firestore/angular-fire-firestore"' has no exported member 'FirestoreSettingsToken'

我的app.module.ts文件：

import { NgModule } from '@angular/core';

...

import { AppComponent } from './app.component';
import { AppRoutingModule } from './app-routing.module';
import { AngularFireModule } from '@angular/fire';
import { environment } from '../environments/environment';
import { AngularFirestoreModule, FirestoreSettingsToken } from '@angular/fire/firestore';

@NgModule({
  declarations: [AppComponent],
  entryComponents: [],
  imports: [
...
    AngularFireModule.initializeApp(environment.firebaseConfig),
      AngularFirestoreModule,
  ],

与供应商：

{provide: FirestoreSettingsToken, useValue: { }}

我的工具：

Firestore: 8.0.2
Angular, Firebase, npm: 6.13.4

我一直试图解决这个错误一段时间.错误读取Can't resolve all parameters for AngularFirestore: ([object Object], ?).有没有其他人有这个问题,你怎么能解决这个问题.我已经阅读了文档,但我无法理解这个问题.

import { Component } from '@angular/core';
import { AngularFirestore } from 'angularfire2/firestore';
import { AngularFireDatabase } from 'angularfire2/database';
import { Observable } from 'rxjs/Observable';

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
    styleUrls: ['./app.component.css'],
    providers: [AngularFirestore, AngularFireDatabase]
})
export class AppComponent {
    items: Observable<any[]>;

    constructor(db: AngularFirestore, adb: AngularFireDatabase) {
        this.items = db.collection('0').valueChanges();
        console.log(this.items)

    }
}

的package.json

"angularfire2": "^5.0.0-rc.3",
"firebase": "^4.6.0",