[英]Angular2 Router and Multiple Resolves in one route
在ui-router
很容易在路由配置中定义多个解析,所以让我们说一下:
export const APP_STATES: Ng2StateDeclaration[] = [
{
name: 'dashboard',
url: '/dashboard',
component: DashboardComponent,
resolve: [
{
token: 'playbookDurations',
deps: [DashboardService],
resolveFn: (svc: DashboardService) => svc.getPlaybookDurations()
},
{
token: 'playbookSuccesses',
deps: [DashboardService],
resolveFn: (svc: DashboardService) => svc.getPlaybookSuccesses()
},
{
token: 'playbookRuns',
deps: [DashboardService],
resolveFn: (svc: DashboardService) => svc.getPlaybookRuns()
},
{
token: 'activityLog',
deps: [DashboardService],
resolveFn: (svc: DashboardService) => svc.getActivityLog()
}
]
}
}];
使用 Angular2 路由器时,要求您为解析参数实现解析器模式。 所以像这样:
import { Resolve, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { Injectable } from '@angular/core';
import { DashboardService } from '.';
@Injectable()
export class DashboardResolver implements Resolve<any> {
constructor(private dashboardService: DashboardService) { }
resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
return this.dashboardService.get();
}
}
然后在我的路线中,我执行以下操作:
import { DashboardComponent } from './dashboard.component';
import { DashboardResolver } from './dashboard.resolver';
export const routes = [
{
path: '',
children: [
{
path: '',
component: DashboardComponent,
resolve: {
data: DashboardResolver
}
}
]
}
];
问题是只有一个解决方案。 如何像 ui-router 实现一样实现多个解析参数?
我想您有 2 个选择:为每个输入实现解析器,或者让解析返回一个对象,其中包含所有嵌套的解析。 第一个看起来很仪式,第二个听起来很hacky,所以必须有更好的方法。
好吧,我希望我没有误解这个问题。
Angular 的路由器支持每条路由尽可能多的解析器。
在路由声明中, resolve
属性是一个对象,它可以有任意多的键:
{
path: '',
component: DashboardComponent,
resolve: {
foo: Resolver1
bar: Resolver2,
// more resolves here...
}
}
然后从您的组件中检索解析的数据:
@Component({ ... })
export class MyComponent {
constructor(private route: ActivatedRoute) { }
ngOnInit() {
const foo = this.route.snapshot.data['foo'];
const bar = this.route.snapshot.data['bar'];
}
}
在所有解析完成/完成之前,不会激活该路线。
仅使用一个 RESOLVER 即可获得相同的结果:
resolve(route: ActivatedRouteSnapshot,state: RouterStateSnapshot,): Observable<any> {
let companyIdentifierTypes = this.companiesService.getCompanyIdentifierTypes();
let mobilePrefixes = this.registrationService.getMobilePrefixes();
let data = {companyIdentifierTypes: companyIdentifierTypes, mobilePrefixes: mobilePrefixes};
return Observable.of(data);
}
并以这种方式获取解析的数据:
fetchDataBeforeViewRender() {
let data = this.route.snapshot.data['data'];
if(data != null) {
data.companyIdentifierTypes.subscribe(data => {this.identityTypeIDList = data;});
data.mobilePrefixes.subscribe(data => {this.mobilePrefixOptions = data;});
}
}
确保正确命名解析器!
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.