0
所以,我有以下服务/组件:入门推迟从订阅变量Angular2服务
dasboard.service.ts(节选)
@Injectable()
export class DashboardService extends RestHelpers {
private _Manager$: Subject<Manager> = new Subject();
constructor(private http: Http) {
super(http);
this.get<Manager>(url).subscribe(result => {
this._Manager$.next(result);
}, error => this.errorMsg = error);
}
get manager$(): Observable<Manager> {
return this.Manager$.asObservable();
}
}
rental.service.ts(节选)
@Injectable()
export class RentalService extends RestHelpers {
constructor(private http: Http, private _dashboardService: DashboardService) {
super(http);
this._dashboardService.manager$.subscribe(r => {
this._rentals = r.Rentals;
this._rentals$.next(this._rentals);
});
}
get rentals$(): Observable<{}> {
return this._rentals$.asObservable();
}
findRental(id: string): Observable<Rental> {
return this.rentals$.map((r: Rental) => r.find(rental => r.RentalId === id));
}
}
租赁-detail.component.ts(节选)
export class RentalDetailsComponent implements OnInit {
private rental: Rental;
public title = "Rental";
constructor(private _rentalService: RentalService, private route: ActivatedRoute, private router: Router) {
this.rental = <Rental>{};
}
ngOnInit() {
this.sub = this.route.params.subscribe(params => {
let id = params['id'];
if (id !== undefined) {
this._rentalService.findRental(id).subscribe((rental) => {
this.rental = rental;
this.title = rental.RentalName;
});
}
});
}
}
当构建组件时,该服务已在另一个组件上调用过一次,而当我想将其路由到细节时,我永远无法获得租用。在组件调用中,服务被启动(构造函数运行),但似乎subscribe方法什么都不产生,尽管第一次被称为subscribe实际上正在工作。
电话订购:
Dasboard Component --- Dashboard Service
|
+ Rental Dashboard Component --- Rental Service --- (depends on) Dashboard Service
|
+ Rental Details Component --- Rental Service --- (depends on) Dashboard Service
租金构成是通过路由器出口仪表板组件上两个孩子,所以它们不是直接分量。
我想过要等待订阅完成的变量,我尝试使用承诺,但他们永远不会返回订阅的价值,这是我想出来的最好的,但它不起作用。这是我第一次使用rxjs和angular2,我无法解开这个结。帮助将不胜感激。
的package.json(节选)
"@angular/common": "2.0.0-rc.5",
"@angular/compiler": "2.0.0-rc.5",
"@angular/core": "2.0.0-rc.5",
"@angular/http": "2.0.0-rc.5",
"@angular/router": "3.0.0-rc.1",
"@angular/router-deprecated": "2.0.0-rc.2",
"@angular/upgrade": "2.0.0-rc.5",
"angular2-in-memory-web-api": "0.0.15",
"core-js": "^2.4.0",
"reflect-metadata": "^0.1.3",
"rxjs": "5.0.0-beta.6",
"systemjs": "0.19.27",
"zone.js": "^0.6.12"
附加注释:我应该使用某种商店,因为服务正在被许多组件重用? – zbrukas
对我来说,你实际上试图完成的事情还不太清楚。什么是“经理”?你多久需要取回它?只有在启动时或每次出租搜索时才有一次? –
@GünterZöchbauer我只是在开始时加载它。经理有客户,出租等,我想分开他们自己的服务,因为他们有自己的仪表板。 – zbrukas