在Angular2 Dart中设置Router&RouterLink的正确方法是什么

Question

问:什么是正确的方法来设置Router和RouterLink在Angular2 Dart.

main.dart

import 'package:angular2/angular2.dart';
import 'package:angular2/router.dart';

import 'package:angular2/src/reflection/reflection.dart' show reflector;
import 'package:angular2/src/reflection/reflection_capabilities.dart' show ReflectionCapabilities;


@Component(
    selector: 'home'
)
@View(
    template: '<h1>I am Home</h1><a router-link="child">Go Child</a>',
    directives: const [RouterOutlet, RouterLink]
)
class Home {}

//
//
//

@Component(
  selector: 'child'
)
@View(
    template: '<h1>I am Child</h1><a router-link="home">Go Home</a>',
    directives: const [RouterOutlet, RouterLink]
)
class Child {}

//
//
//

@Component(
  selector: 'index'
)
@View(
  template: '''
  <router-outlet></router-outlet>
            ''',
  directives: const [RouterOutlet, RouterLink]
)
class Index {
  Router router;

  Index(Router this.router) {
    router.config({ 'path': '/child', 'component': Child, 'alias': 'child'});
    router.config({ 'path': '/', 'component': Home, 'alias': 'home'});
  }

}

main() {
  reflector.reflectionCapabilities = new ReflectionCapabilities();
  bootstrap(Index, routerInjectables);
}

这是我的方法:

在router_link.dart我看到newHref回来null

onAllChangesDone() {
    if (isPresent(this._route) && isPresent(this._params)) {
      var newHref = this._router.generate(this._route, this._params);
      this._href = newHref;
      // Keeping the link on the element to support contextual menu `copy link`

      // and other in-browser affordances.
      print('newHref');
      print(newHref);
      DOM.setAttribute(this._domEl, "href", newHref);
    }

这会导致错误并导致导航请求失败.

字符串预期STACKTRACE:0 BlinkElement.setAttribute_Callback_2(dart:_blink:7565)

1 BlinkElement.setAttribute_Callback_2_(dart:_blink:7566)

2 Element.setAttribute(dart:html:13673)

3 BrowserDomAdapter.setAttribute(package:angular2/src/dom/browser_adapter.dart:258:25)

4 RouterLink.onAllChangesDone(包:angular2/src/router/router_link.dart:66:23)

Answer 1

从 Angular Dart 2.0.0（候选版本）开始，路由器链接的正确语法是：

<a [router-link]="['./Home']">Go Home</a>

该值是传递给 的参数列表Router.navigate()。

配置路由的正确语法是：

@Component(
    selector: 'my-app',
    template: ...,
    directives: const [ROUTER_DIRECTIVES],
    providers: const [HeroService, ROUTER_PROVIDERS])
@RouteConfig(const [
  const Route(
      path: '/dashboard',
      name: 'Dashboard',
      component: DashboardComponent,
      useAsDefault: true),
  const Route(
      path: '/detail/:id', name: 'HeroDetail', component: HeroDetailComponent),
  const Route(path: '/heroes', name: 'Heroes', component: HeroesComponent)
])
class AppComponent {
  String title = 'Tour of Heroes';
}