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我想使用角2与firebase和我已经设法推送数据到firebase和得到的后面,但是当我尝试向firebase添加新的数据他们不会反映在.get可观察到的自动 - 必须刷新页面或在路由之间切换,这是正确的行为?如果不是,我应该怎么做,以自动更新新的价值观,因为他们来了?可观察不发射新值
import { Component, OnInit } from "angular2/core";
import { FirebaseService } from "../shared/firebase.service";
import { ArcItem } from "./arc-item.model";
import { Observable } from "rxjs/Observable";
import { KeysPipe } from "../shared/keys.pipe";
@Component({
selector: "arc-list",
template: `
<ul class="arc-list">
<li *ngFor="#item of listItems | async | keys" class="arc-item">
<h3>{{ item.name}}</h3><a [href]="item.resourceUrl" target="_blank" class="btn btn-success pull-right"><span>Go</span></a>
<hr>
<blockquote>{{ item.description }}</blockquote>
<hr>
</li>
</ul>
`,
pipes: [KeysPipe]
})
export class ArcListComponent implements OnInit {
listItems: Observable<any[]>;
constructor(private _firebaseService: FirebaseService) {}
ngOnInit(): any {
this.listItems = this._firebaseService.getResources();
}
}
firebase.service
import { Injectable } from "angular2/core";
import { Http } from "angular2/http";
import { ArcItem } from "../arc/arc-item.model";
import "rxjs/Rx";
@Injectable()
export class FirebaseService {
constructor(private _http: Http) {}
setResource(id: number, title: string, description: string, resourceUrl: string) {
const body = JSON.stringify({ id: id, title: title, description: description, resourceUrl: resourceUrl});
return this._http
.post("https://#####.firebaseio.com/resource.json", body)
.map(response => response.json());
}
getResources() {
return this._http
.get("https://#####.firebaseio.com/resource.json")
.map(response => response.json());
}
}
有没有没有Firebase库的代码版本?因为我只是使用firebase的其余api。 –
事实上,如果没有这个,当你收到'setResource'的响应时(在'setResource'返回的observable中订阅的回调函数中),你需要明确调用'getResources'方法...希望我能正确理解你的使用案件。 –
我会尝试,谢谢你,但每次调用getResources都不会获取所有数据而不是只添加一个或? –