angularfire2 找不到模块“firebase/app”

Question

应用程序组件：

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"
}
}

位于服务中的无效导入：

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，但如果我错过了什么，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。问题出在 import { auth } 中，它允许我登录到 firebase。我不知道是什么问题。有时编译，有时不编译。这是迄今为止我使用的唯一版本组合，即使有时会出现错误也能编译。其他版本只会破坏其他进口。

该项目仅在我暂时删除身份验证导入然后将其放回然后保存时才编译。

Answer 1

npm install firebase

解决了我的问题

Answer 2

使用此命令安装 firebasenpm i @angular/fire

Answer 3

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

应用程序组件（应用程序模块？）

您的导入和文件不一致，我看到您从angularfire2以及导入@angular/fire。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. npm uninstall angularfire2那就跑吧npm i @angular/fire。最后你应该更新你的app.component（我想你的意思app.module是）......

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，如果您有存储库并且希望我检查一下我可以提供更多帮助，我希望能够看到更多代码，但希望这将是一个坚实的开始/修复。