angularfire2 找不到模块'firebase/app'

Question

app.component ：

import { AngularFireModule } from '@angular/fire';
import { AngularFirestoreModule } from 'angularfire2/firestore';
import { RoomComponent } from './component/room/room.component';
import { AngularFireAuth } from '@angular/fire/auth';
import { FirebaseService } from "./service/firebase.service";
import { AngularFireAuthModule } from 'angularfire2/auth';


imports: [
  BrowserModule,
  AngularFireModule.initializeApp(firebaseconfig),
  AngularFirestoreModule
],
providers: [
  FirebaseService,
  {
    provide: PERFECT_SCROLLBAR_CONFIG,
    useValue: DEFAULT_PERFECT_SCROLLBAR_CONFIG
  },
  AngularFireAuth
],

package.json 文件：

{
"dependencies": {
"@angular/animations": "^5.2.11",
"@angular/cdk": "^5.2.4",
"@angular/common": "^5.2.0",
"@angular/compiler": "^5.2.0",
"@angular/core": "^5.2.0",
"@angular/forms": "^5.2.0",
"@angular/http": "^5.2.0",
"@angular/material": "^5.2.4",
"@angular/platform-browser": "^5.2.0",
"@angular/platform-browser-dynamic": "^5.2.0",
"@angular/router": "^5.2.0",
"angularfire2": "^5.0.1",
"core-js": "^2.4.1",
"dateformat": "^3.0.3",
"firebase": "^5.5.1",
"rxjs": "^6.3.2",
"rxjs-compat": "^6.3.2",
  "zone.js": "^0.8.19"
  },
"devDependencies": {
"@angular/cli": "~1.7.4",
"@angular/compiler-cli": "^5.2.0",
"@angular/language-service": "^5.2.0",
"ts-node": "~4.1.0",
"tslint": "~5.9.1",
"typescript": "~2.5.3"
}
}

在服务中不起作用的导入：

import { AngularFirestore, AngularFirestoreCollection, 
   AngularFirestoreDocument } from 'angularfire2/firestore';
import { AngularFireAuth } from '@angular/fire/auth';
import { auth } from 'firebase/app'
import { Observable } from 'rxjs';

我只包含了可能与错误有关的依赖项，但如果我遗漏了什么，请告诉我。

我已经尝试了多个版本。这确实有效，但它有一个错误。问题在于允许我登录到 Firebase 的 import { auth }。我不知道问题是什么。有时它编译，有时它不编译。这是我迄今为止使用的唯一版本组合，有时即使出现错误也可以编译。其他版本只是破坏了其他导入。

只有当我暂时删除身份验证导入然后将其放回然后保存时，该项目才会编译。

Answer 1

npm install firebase

解决了我的问题

Answer 2

使用这个命令npm i @angular/fire安装firebase

Answer 3

我将从大的开始，我只想说尝试删除您的node_modules 文件夹和package-lock.json，然后重新运行命令npm install。除此之外，还有一些建议......

app.component (app.module?)

您的导入和文件不一致，我看到您从angularfire2 和@angular/fire 导入。虽然它们实际上是同一件事，只是 Angular 团队正在迁移/迁移到@angular/fire。运行npm uninstall angularfire2，然后运行npm i @angular/fire。最后你应该更新你的app.component（我想你的意思是app.module）......

import { AngularFireModule } from '@angular/fire';
import { AngularFirestoreModule } from '@angular/fire/firestore';
import { RoomComponent } from './component/room/room.component';
import { AngularFireAuth } from '@angular/fire/auth';
import { FirebaseService } from "./service/firebase.service";
import { AngularFireAuthModule } from '@angular/fire/auth';


imports: [
  BrowserModule,
  AngularFireModule.initializeApp(firebaseconfig),
  AngularFirestoreModule,
  AngularFireAuthModule // IMPORT THE AUTH MODULE IF YOU'RE GOING TO USE IT
],
  providers: [
    FirebaseService,
    {
      provide: PERFECT_SCROLLBAR_CONFIG,
      useValue: DEFAULT_PERFECT_SCROLLBAR_CONFIG
    },
    // AngularFireAuth (don't need/should not provide this, allow the module to set this up)
  ],

请注意，我希望能够看到更多代码，如果你有一个 repo 并希望我检查一下，我可以提供额外的帮助，但希望这将是一个可靠的开始/修复。

Answer 4

在您的 app.module.ts 中：

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { AngularFireModule } from '@angular/fire';
import { AngularFireDatabaseModule } from '@angular/fire/database';

import { AppComponent } from './app.component';

const config = {
  apiKey: "",
  authDomain: "",
  databaseURL: "",
  storageBucket: "",
  messagingSenderId: ""
};

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