typescript 从“angularfire2/database”导入 { AngularFireDatabase, FirebaseListObservable };
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import { AngularFireDatabase, FirebaseListObservable } from "angularfire2/database";
提问by asli
i had problem to
我有问题
import { AngularFireDatabase, FirebaseListObservable } from "angularfire2/database";
i imported AngularFireDatabase but FirebaseListObservable was under a red line after searching this post helped me resolve my problem Getting an error: "Has no exported member AngularFire, AuthProviders, AUthMethods, FirebaseListObservable" in AngularFire2?
我导入了 AngularFireDatabase，但在搜索这篇文章后，FirebaseListObservable 位于红线下帮助我解决了我的问题 收到错误：“AngularFire2 中没有导出成员 AngularFire、AuthProviders、AUthMethods、FirebaseListObservable”？
import { AngularFireDatabase, FirebaseListObservable } from "angularfire2/database-deprecated";
but when i compile i get and it cant help i dont know what to do where searching ect core.es5.js:1020 ERROR Error: Uncaught (in promise): Error: No provider for AngularFireDatabase! Error: No provider for AngularFireDatabase!
但是当我编译时我得到了它并不能帮助我不知道在搜索 ect core.es5.js:1020 错误错误：未捕获（承诺）：错误：没有 AngularFireDatabase 的提供者！错误：没有 AngularFireDatabase 的提供者！
"angularfire2": "^5.0.0-rc.2", "core-js": "^2.4.1", "firebase": "^4.5.0",
"angularfire2": "^5.0.0-rc.2", "core-js": "^2.4.1", "firebase": "^4.5.0",
回答by asli
i got the answer after reading https://github.com/angular/angularfire2/blob/master/CHANGELOG.md5.0.0-rc.0 (2017-10-03)
我在阅读https://github.com/angular/angularfire2/blob/master/CHANGELOG.md5.0.0-rc.0 (2017-10-03)后得到了答案
the -deprecated allows you to use the old database API
-deprecated 允许您使用旧的数据库 API
import { AngularFireDatabaseModule } from 'angularfire2/database-deprecated';
in the app.module.js and in your service you use
在 app.module.js 和您使用的服务中
import { AngularFireDatabase, FirebaseListObservable } from "angularfire2/database-deprecated";
thank you both of you, you helped me
谢谢你们，你们帮助了我
回答by S.Adikaram
In angularfire2": "^5.0.0-rc.2 you can't use FirebaseListObservable instead you will have to use
在 angularfire2": "^5.0.0-rc.2 你不能使用 FirebaseListObservable 而你必须使用
import { AngularFireDatabase } from 'angularfire2/database';
and use it like this
并像这样使用它
constructor(public af: AngularFireDatabase) {
let restaurants = this.af.list('/path');
}
回答by Sajeetharan
You need to import the following and add it under your app.module.ts
您需要导入以下内容并将其添加到您的 app.module.ts 下
import { AngularFireModule } from 'angularfire2';
import { AngularFireDatabaseModule } from 'angularfire2/database';
@NgModule({
declarations: [
AppComponent
],
imports: [
BrowserModule,
AngularFireModule.initializeApp(firebaseConfig),
AngularFireDatabaseModule
],
providers: [],
bootstrap: [AppComponent]
})
export class AppModule { }
回答by Ahmed fathy
You can't use FirebaseListObservable in current version of angularfire2.
It worked in old version of angularfire2 like 4.0.0-rc.1.
您不能在当前版本的 angularfire2 中使用 FirebaseListObservable。
它适用于旧版本的 angularfire2，如 4.0.0-rc.1。
So, install it and it will work totally fine (in terminal):
因此，安装它，它将完全正常工作（在终端中）：
npm i [email protected]
npm i [email protected]
and import:
并导入：
import {AngularFireDatabase,FirebaseListObservable} from 'angularfire2/database';
import { AngularFireAuthModule, AngularFireAuth } from 'angularfire2/auth';
