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我有一个Angular 2/4服务,它使用observables与其他组件进行通信。角度服务没有更新订阅组件
服务:
let EVENTS = [
{
event: 'foo',
timestamp: 1512205360
},
{
event: 'bar',
timestamp: 1511208360
}
];
@Injectable()
export class EventsService {
subject = new BehaviorSubject<any>(EVENTS);
getEvents(): Observable<any> {
return this.subject.asObservable();
}
deleteEvent(deletedEvent) {
EVENTS = EVENTS.filter((event) => event.timestamp != deletedEvent.timestamp);
this.subject.next(EVENTS);
}
search(searchTerm) {
const newEvents = EVENTS.filter((obj) => obj.event.includes(searchTerm));
this.subject.next(newEvents);
}
}
我home
组成部分能够在申请开通此项服务并正确当事件被删除更新:
export class HomeComponent {
events;
subscription: Subscription;
constructor(private eventsService: EventsService) {
this.subscription = this.eventsService.getEvents().subscribe(events => this.events = events);
}
deleteEvent = (event) => {
this.eventsService.deleteEvent(event);
}
}
我也有显示根组件搜索表单。表单提交后,它会调用服务,执行搜索并调用this.subject.next
,结果如上所示。但是,这些结果并未反映在home
组件中。我哪里错了?完整代码请参见plnkr.co/edit/V5AndArFWy7erX2WIL7N。