“FirebaseListObservable"类型上不存在属性“过滤器" [英] Property 'filter' does not exist on type 'FirebaseListObservable'

问题描述

我正在使用 Ionic 2 和 Firebase 来构建聊天应用.

我添加了以下应该用于添加过滤器的内容:

import 'rxjs/add/operator/filter';...公共 af:AngularFire...this.firelist = this.af.database.list('/chat/', {询问: {orderByChild: '否定时间戳'}}).filter(item => item.memberIds === 'xxx');

但是，我得到以下信息:

<块引用>

[ts] 类型上不存在属性过滤器"'FirebaseListObservable'.

ps.this.af.database.list(...) 返回一个 FirebaseListObservable

感谢任何帮助.

更新

如果您查看

解决方案

此问题已在以下版本中修复:

"angularfire2": "^2.0.0-beta.7.1-pre",

解决方案:

npm install firebase angularfire2@^2.0.0-beta.7.1-pre --save

I am using Ionic 2 and Firebase to build a chat app.

I add the following which is supposed to be used to add a filter:

import 'rxjs/add/operator/filter';
        ...
public af: AngularFire
        ...
    this.firelist = this.af.database.list('/chat/', {
      query: {
        orderByChild: 'negativtimestamp'
      }
    }).filter(item => item.memberIds === 'xxx');

However, I get the following:

[ts] Property 'filter' does not exist on type 'FirebaseListObservable'.

ps. this.af.database.list(...) returns a FirebaseListObservable<any[]>. filter can be done on Observable but not on FirebaseListObservable.

Question

So how do I implement the filter on FirebaseListObservable because class FirebaseListObservable<T> extends Observable<T>?

Also

import 'rxjs/add/operator/map'
            ...
    this.af.database.list('').map(item => {});

has the following error:

[ts] Property 'map' does not exist on type 'FirebaseListObservable'.

More Info:

My package.json has:

 "rxjs": "5.0.0-beta.12",

Any help appreciated.

UPDATE

If you look at the following youtube tutorial, they do exactly what I want to achieve, but without the errors. Does anyone know why I get errors? I am using "angularfire2": "^2.0.0-beta.7-pre",.

解决方案

This issue was fixed in the following version:

"angularfire2": "^2.0.0-beta.7.1-pre",

Solution:

npm install firebase angularfire2@^2.0.0-beta.7.1-pre --save

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