Angular 2 - 相当于路由器解析新路由器的数据

Question

我正在玩Angular 2.0 new router,我尝试使用类似于Angular 1.X ui-router/ng-route解析机制的东西.

我试图通过以下方式实现此目的RouteData:

import {Component, ViewEncapsulation} from 'angular2/core';
import {
  RouteConfig,
  ROUTER_DIRECTIVES
} from 'angular2/router';
// import {HTTP_PROVIDERS} from 'angular2/http';

import {HomeCmp} from '../home/home';
import {AboutCmp} from '../about/about';
import {NameList} from '../../services/name_list';
import {PersonalizationList} from '../../services/personalization_list';

@Component({
  selector: 'app',
  viewProviders: [NameList, PersonalizationList],
  templateUrl: './components/app/app.html',
  styleUrls: ['./components/app/app.css'],
  encapsulation: ViewEncapsulation.None,
  directives: [ROUTER_DIRECTIVES]
})
@RouteConfig([
  { path: '/', component: HomeCmp, as: 'Home', data: this.history },
  { path: '/about', component: AboutCmp, as: 'About' }
])
export class AppCmp {
  history: string[] = [];
  constructor(public list: PersonalizationList) {
    list.get('histoy', (response) => {
      this.history = response;
    });
  }
}

使用this(home)的组件:

import {Component} from 'angular2/core';
import {PersonalizationList} from '../../services/personalization_list';
import {Router, ROUTER_DIRECTIVES, routerBindings, RouteConfig, RouteData} from 'angular2/router';

@Component({
  selector: 'home',
  templateUrl: './components/home/home.html',
  styleUrls: ['./components/home/home.css'],
  directives: [ROUTER_DIRECTIVES]
})
export class HomeCmp {
  constructor(data: RouteData) {
    console.log(data);
  }
}

记录到控制台的数据不是我从服务初始化的数据.如果我直接初始化它@RouteConfig,它将起作用.例如:

@RouteConfig([
  { path: '/', component: HomeCmp, as: 'Home', data: [1,2,3,4] },
  { path: '/about', component: AboutCmp, as: 'About' }
])

所以,我错过了从控制器/组件传递数据的部分@RouteConfig.

另一个问题 - 在Angular 1.X中,通过路由器的解决方案将数据传递到路由是一种很好的做法.以这种方式将数据传递给组件仍然是一种很好的做法,使用new router/ components router？

编辑 可以在此处找到解决方案- 使用@CanActivate事件

Answer 1

您必须将@RouteConfig移动到AppCmp构造函数中:

//@RouteConfig([
//  { path: '/', component: HomeCmp, as: 'Home', data: this.history },
//  { path: '/about', component: AboutCmp, as: 'About' }
//])
export class AppCmp {
  history: string[] = [];
  constructor(public list: PersonalizationList,
              private router_: Router) {
    list.get('histoy', (response) => {
      this.history = response;
    });
    router_.config([
      { path: '/', component: HomeCmp, as: 'Home', data: this.history },
      { path: '/about', component: AboutCmp, as: 'About' }
    ]);
  }
}

在控制台输出上我可以看到:

RouteData {data:"test sample"}

希望能帮助到你!

Answer 2

更新

@Injectable()
export class CrisisDetailResolve implements Resolve<Crisis> {
  constructor(private cs: CrisisService, private router: Router) {}
  resolve(route: ActivatedRouteSnapshot): Promise<Crisis>|boolean {
    let id = route.params['id'];
    return this.cs.getCrisis(id).then(crisis => {
      if (crisis) {
        return crisis;
      } else { // id not found
        this.router.navigate(['/crisis-center']);
        return false;
      }
    });
  }
}

  children: [
  {
    path: ':id',
    component: CrisisDetailComponent,
    canDeactivate: [CanDeactivateGuard],
    resolve: {
      crisis: CrisisDetailResolve
    }
  },

ngOnInit() {
  this.route.data
    .subscribe((data: { crisis: Crisis }) => {
      this.editName = data.crisis.name;
      this.crisis = data.crisis;
    });
}

https://angular.io/docs/ts/latest/guide/router.html#!#resolve-guard

原版的

得到了在RC.4新的路由器解决增加

resolve是用于查找数据解析器的DI令牌的映射.有关详细信息,请参阅Resolve.

class TeamResolver implements Resolve {
  constructor(private backend: Backend) {}
  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot):Observable<any> {
    return this.backend.fetchTeam(this.route.params.id);
  }
}

bootstrap(AppComponent, [
  TeamResolver,
  provideRouter([{
    path: 'team/:id',
    component: TeamCmp,
    resolve: {
      team: TeamResolver
    }
  }])
);

另请参见RouterConfig