Angular Firebase：导入问题

Question

我创建了一个服务文件来管理我的 firebase 用户身份验证。但是，我在 auth.service.ts 文件中找到了导入错误。以下是导入后的错误和 ts 文件中的代码。

错误：

src/app/core/auth.service.ts(2,10) 中的错误：错误 TS2305：模块“C:/Users/Zakariah Siyaji/Desktop/or-api/node_modules/angularfire2/index”有没有导出的成员 'AngularFireAuth'。 src/app/core/auth.service.ts(2,27): error TS2305: Module '"C:/Users/Zakariah Siyaji/Desktop/or-api/node_modules/angularfire2/index"' 没有导出成员 'AngularFireDatabase '。 src/app/core/auth.service.ts(2,48): error TS2305: Module '"C:/Users/Zakariah Siyaji/Desktop/or-api/node_modules/angularfire2/index"' 没有导出成员 'FirebaseAuthState '。 src/app/core/auth.service.ts(2,67): error TS2305: Module '"C:/Users/Zakariah Siyaji/Desktop/or-api/node_modules/angularfire2/index"' 没有导出成员 'AuthProviders '。 src/app/core/auth.service.ts(2,82): error TS2305: Module '"C:/Users/Zakariah Siyaji/Desktop/or-api/node_modules/angularfire2/index"' 没有导出成员 'AuthMethods '。 src/app/core/auth.service.ts(2,95): error TS2305: Module '"C:/Users/Zakariah Siyaji/Desktop/or-api/node_modules/angularfire2/index"' 没有导出成员 'AngularFire '。

i ｢wdm｣：编译失败。

进口：

从“angularfire2”导入{ AngularFireAuth, AngularFireDatabase, FirebaseAuthState, AuthProviders, AuthMethods, AngularFire }；

angularfire2 也在 package.json 文件夹中，版本号为：“^5.0.0-rc.11”

代码：

import { Injectable } from '@angular/core';
import { AngularFireAuth, AngularFireDatabase, FirebaseAuthState, AuthProviders, AuthMethods, AngularFire } from "angularfire2";
import { Router } from "@angular/router";

@Injectable({
  providedIn: 'root'
})


export class AuthService {
  authState: FirebaseAuthState = null;

  constructor(private af: AngularFire, private db: AngularFireDatabase, private router: Router) {
    af.auth.subscribe((auth) => {
      this.authState = auth;
    });
  }


  //Return true if user is logged in
  get authenticated(): boolean {
  return this.authState !== null;
}
  //Returns current user
  get currentUser(): any {
  return this.authenticated ? this.authState.auth : null;
}

 //Returns current user UID
 get currentUserId(): string {
 return this.authenticated ? this.authState.uid : '';
}

// Anonymous User
get currentUserAnonymous(): boolean {
return this.authenticated ? this.authState.Anonymous : false
}

//Returns current user display name or guest
get currentUserDisplayName(): string {

if (!this.authenticated) { return 'GUEST' }
else if (this.currentUserAnonymous) { return 'ANONYMOUS'}
else { return this.authState.auth.displayName || 'OAUTH USER'}

}

//login through a Gmail account
googleLogin(): Promise<FirebaseAuthState> {
return this.socialSignIn(AuthProviders.Google);
}

private socialSignIn(provider: number): Promise<FirebaseAuthState> {
  return this.af.auth.login({provider, method: AuthMethods.popup})
  .then(() => this.updateUserData() )
  .catch(error => console.log(error));
}

private updateUserData(): void {
  //Writes user name and email to realtime db
  //useful if your app displays information about users or for admin features

  let path = `users/${this.currentUserId}`; //Endpoint on Firebase
  let data = { name: this.currentUser.displayName, email: this.currentUser.email, }

  this.db.object(path).update(data)
  .catch(error => console.log(error));
}


}

Answer 1

错误信息非常清楚。您从错误的路径导入。下面是一些正确的例子，看看导入位置。

import { AngularFireAuth } from 'angularfire2/auth';
import { AngularFireDatabase } from 'angularfire2/database';

Answer 2

您只需要更新您的导入语句。例如，要导入 auth 和 db 模块，您应该这样做：

import { AngularFireModule } from 'angularfire2';
import { AngularFireDatabaseModule, AngularFireDatabase, FirebaseListObservable } from 'angularfire2/database';
import { AngularFireAuthModule, AngularFireAuth } from 'angularfire2/auth';

文档给出了full upgrade path。