运行时错误:Object(...)不是函数Ionic/Firebase/Angular [英] Runtime Error: Object(...) is not a function Ionic/Firebase/Angular

问题描述

我正在创建一个Ionic应用程序，其中有我要显示的信息列表，我使用Firebase作为数据库(实时数据库).

I'm creating an Ionic app where there is a list of information that I want to display, I'm using Firebase as my database (Realtime Database).

但是我一直收到此错误:

But I've been getting this error:

Object(...)不是函数

Object(...) is not a function

而且我不确定为什么自从代码看起来还不错(我检查了angularfire2 git来确定).

And I'm not sure why since the code seems fine (I checked angularfire2 git to make sure).

所以这是代码:

list.ts

import { Component } from '@angular/core';
import { NavController, NavParams } from 'ionic-angular';
import { AngularFireDatabase } from 'angularfire2/database';


@Component({
  selector: 'page-list',
  templateUrl: 'list.html'
})
export class ListPage {

  informationslist:any;

  constructor(public navCtrl: NavController, public navParams: NavParams,
  private afDB: AngularFireDatabase) {



      try{
      this.informationslist = afDB.list('information',  (ref) => 
      ref.orderByChild('datetime')).valueChanges();

      }catch(e){

        console.log(e);
      }


  }



}

list.html

<ion-header>
  <ion-navbar>
    <button ion-button menuToggle>
      <ion-icon name="menu"></ion-icon>
    </button>
    <ion-title>List</ion-title>
  </ion-navbar>
</ion-header>

<ion-content>

<ion-list>
  <ion-item *ngFor="let i of informationslist | async">{{i.title}}</ion-item>
</ion-list>



</ion-content>

推荐答案

能否提供rxjs的版本.在大多数情况下，错误的版本可能会引起问题.我认为当前的angularfire2需要rxjs版本6.0.0或更高版本.完整的javascript堆栈也可能有用.

Can you please provide the version of rxjs. In most cases there could be a problem with the wrong version of it. I think current angularfire2 needs rxjs version 6.0.0 or greater. The full javascript stack could also be useful.

如果您以前使用过另一个rxjs版本，现在又尝试升级，请考虑以下迁移指南:

Also if you used another rxjs version before and now try to upgrade consider the migration guide for this: Migration guide rxjs from 5 to 6

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