如何使用 AngularFire2 执行可调用函数 [英] How to execute callable functions using AngularFire2

问题描述

firebase 中的可调用函数可以如下执行:

Callable functions in firebase can be executed as below:

firebase.functions().httpsCallable('addMessage');

我想知道 AngularFire2 中的等效项是什么.我已经扫描了文档，但没有看到任何提及.

I am wondering what is the equivalent of this in AngularFire2. I have scanned the documents and don't see any mention of this.

如果没有等价物，那么我如何在 AngularFire2 中获取底层 firebase 对象的句柄?

If there is no equivalent then how do i obtain a handle to underlying firebase object in AngularFire2 ?

推荐答案

确保将 angularfire2 版本更新到 RC9 或更高版本 - 因为这是 PR 已合并.

Make sure you update your angularfire2 version to RC9 or higher - as this is when the PR was merged.

npm install angularfire2@latest

将 AngularFireFunctions 添加到 app.module 中的 providers.

Add AngularFireFunctions to your providers in your app.module.

import { AngularFireFunctions } from 'angularfire2/functions';

@NgModule({
  providers: [
    AngularFireFunctions
  ],
});

在您的组件中，您可以从 AngularFireFunctions 运行 httpsCallable 函数.

Within your Component you can run httpsCallable function from AngularFireFunctions.

constructor(
  private afFun: AngularFireFunctions,
) { }

ngOnInit() {
  // Angular Fire - Converts Promise to Observable
  this.afFun.httpsCallable('myFunction')({ text: 'Some Request Data' })
    .pipe(first())
    .subscribe(resp => {
      console.log({ resp });
    }, err => {
      console.error({ err });
    });

  // Convert back to Promise
  const respRef = await this.afFun.httpsCallable('myFunction')({ text: 'Some Request Data' })
    .toPromise();

  console.log({ respRef });
}

AngularFire2 存储库中的 评论 询问了响应的原因已转换为 Observable.Firebase 文档 具有返回 Promise 的函数- 所以请注意不一致 - 它可能会在未来发生变化.

A comment in the AngularFire2 repo has asked why the response has been converted to an Observable. The Firebase documentation has the function returning a Promise - so be aware of the inconsistency - it could change in the future.

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