angular

오류 수정에 대한 도움말을 찾고 Angular를 배우고 있습니다.이 링크를 따르고 있습니다 .https : //github.com/angular/angularfire2/blob/master/docs/install-and-setup.md
to create a angle small angular2 및 angularfirestore2가있는 앱

하지만 ng serve를 누르면 브라우저 콘솔에서 아래 오류가 발생합니다.

StaticInjectorError[AngularFirestore]:
  StaticInjectorError[AngularFirestore]:
    NullInjectorError: No provider for AngularFirestore!
    at _NullInjector.get (core.js:923)
    at resolveToken (core.js:1211)
    at tryResolveToken (core.js:1153)
    at StaticInjector.get (core.js:1024)
    at resolveToken (core.js:1211)
    at tryResolveToken (core.js:1153)
    at StaticInjector.get (core.js:1024)
    at resolveNgModuleDep (core.js:10585)
    at NgModuleRef_.get (core.js:11806)
    at resolveDep (core.js:12302)

나는 그것을 인터넷 검색을 시도했지만 나를 위해 일하지 않은 정확한 해결책을 찾지 못했습니다 :(,

내가 따랐던 것은 다음과 같습니다. 1) 설치된 Node 버전 8.9.1 2) npm install -g @ angular / cli-> 버전 1.5.2 3) ng new ‘project-name’4) npm install angularfire2 firebase –save

내 app.module.ts 파일은 다음과 같습니다.

import { BrowserModule } from '@angular/platform-browser';
import { NgModule } from '@angular/core';
import { AppComponent } from './app.component';
import { AngularFireModule } from 'angularfire2';
import { environment } from '../environments/environment';

@NgModule({
  imports: [
    BrowserModule,
    AngularFireModule.initializeApp(environment.firebase)
  ],
  declarations: [ AppComponent ],
  bootstrap: [ AppComponent ]
})
export class AppModule {}

app.component.ts :

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

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = 'app';
  constructor(db: AngularFirestore) {}
}

environemnt.ts :

export const environment = {
  production: false,
  firebase: {
    apiKey: 'xxxxx',
    authDomain: 'aaaaaaa',
    databaseURL: 'bbbbbbbbbbbbbbbbbb',
    projectId: 'aaaaaaaaaaaaaa',
    storageBucket: 'aaaaaaaaaaaa',
    messagingSenderId: 'aaaaaaaaaaaaa'
  }
};

그런 다음 제공하고 위의 오류가 발생합니다 …

답변

@NgModule({
  imports: [
    BrowserModule,
    AngularFireModule.initializeApp(environment.firebase)
  ],
  declarations: [ AppComponent ],
  providers: [AngularFirestore],
  bootstrap: [ AppComponent ]
})
export class AppModule {}

@Injectable()

@Injectable({
  providedIn: 'root'
})

@NgModule({
  declarations: [
    AppComponent,
    OtherComponent // Add other components here
    ...
  ],
  imports: [
    BrowserModule,
    AngularFireModule.initializeApp(environment.firebase, 'your-APP-name-here'),
    AngularFirestoreModule
  ],
  ...
})

imports: [
    BrowserModule, AngularFireModule,
    AngularFireModule.initializeApp(config),
    AngularFirestoreModule.enablePersistence()
]

import { AngularFirestore } from '@angular/fire/firestore/firestore';

import { AngularFirestore } from '@angular/fire/firestore';

$ npm install --save firebase @angular/fire

    import { BrowserModule } from '@angular/platform-browser';
    import { NgModule } from '@angular/core';

    import { AppComponent } from './app.component';
    import { FormsModule } from '@angular/forms';


    import { AngularFireModule } from '@angular/fire';
    import { AngularFireDatabaseModule } from '@angular/fire/database';
    import { environment } from '../environments/environment';
    import { AngularFirestoreModule } from '@angular/fire/firestore';


    @NgModule({
      declarations: [
        AppComponent
      ],
      imports: [
        BrowserModule,
        FormsModule,

        AngularFireModule.initializeApp(environment.firebase),
        AngularFirestoreModule,
        AngularFireDatabaseModule
      ],
      providers: [],
      bootstrap: [AppComponent]
    })
    export class AppModule { }