获取从父母与孩子一起发送的routerParams

Question

我有一个具有@Routeconfig（父级）的组件。

import {Component} from "angular2/core";
import {RouteConfig,ROUTER_DIRECTIVES, RouterOutlet} from 'angular2/router';
import {Theme} from "../theme/theme";
import {Router,RouteParams} from "angular2/router";
import {OrganisationService} from "./organisation.service";
import {Organisation} from "./organisation";
import {OrganisationComponent} from "./organisation.component";
import {EmptyComponent} from "../../empty.component";
import {ThemeListComponent} from "../theme/theme-list.component";

@Component({
    template: `
<div class="container">
    <ul>
        <li *ngFor="#organisation of organisations">
             <a [routerLink]="['./ThemeList',{ organisationId: organisation.organisationId }]" >{{organisation.organisationName}}</a>
        </li>
    </ul>
</div>
<router-outlet></router-outlet>
  `,
    directives:[RouterOutlet],
    providers:[OrganisationService]
})

@RouteConfig([
    {path: '/', name:'Empty', component:EmptyComponent,useAsDefault: true},
    {path: '/:organisationId/Themes/...', name:'ThemeList', component:ThemeListComponent}
])

export class OrganisationListComponent {
    public organisations:Organisation[];
    constructor(private organisationService:OrganisationService) {
        this.organisationService.getOrganisations().subscribe((organisations:Organisation[])=> {
            this.organisations = organisations;
        });
    }
}

我想将组织中的 id 发送给我的ThemeListComponent（孩子）。这可行，但是当我尝试使用我的子组件获取 routeParams 时，它会出错。

例外：路由器实例化期间出错！ （RouterLink -> 路由器）。

原始例外：路由配置应该只包含一个“组件”、“加载器”或“重定向到”属性。

这是 ThemeListComponent 以及我如何尝试接收 routerParams：

import {Component} from "angular2/core";
import {RouteConfig,ROUTER_DIRECTIVES, RouterOutlet} from 'angular2/router';
import {Theme} from "../theme/theme";
import {Router,RouteParams} from "angular2/router";
import {ThemeComponent} from "../theme/theme.component";
import {ThemeService} from "./theme.service";
import {EmptyComponent} from "../../empty.component";

@Component({
    template: `
<div class="container">
  <ul>
     <li *ngFor="#theme of themes">
        <a [routerLink]="['./Theme',{ themeId: theme.themeId }]">{{theme.name}}</a>
    </li>
  </ul>
</div>
<router-outlet></router-outlet>
    `,
    directives:[RouterOutlet,RouteParams],
    providers:[ThemeService]
})

@RouteConfig([
    {path: '/', name:'Empty', component:EmptyComponent,useAsDefault: true},
    {path: '/:themeId', name:'Theme', component:ThemeComponent}
])

export class ThemeListComponent {
    public themes:Theme[];
    constructor(private themeService:ThemeService,private routeParams:RouteParams) {
        let id = +this.routeParams.get('id');
        this.themeService.getThemes(id).subscribe((themes:Theme[])=>{
            this.themes = themes;
        });
    }
}

每当我在孩子的构造函数中实现 routerParams 时，都会出现错误。

Answer 1

我遇到了类似的问题。我通过简单地将 RouteParams 和 Router 与 RouteConfig、ROUTER_DIRECTIVES、RouterOutlet 导入同一行来解决它。

这可能会给你一个错误。所以我改变了

import {RouteConfig,ROUTER_DIRECTIVES, RouterOutlet} from 'angular2/router';
import {Router,RouteParams} from "angular2/router";

到

import {RouteConfig,ROUTER_DIRECTIVES, RouterOutlet, Router,RouteParams} from 'angular2/router';

不知何故，我不明白为什么这不适用于两个单独的导入，但这应该可以解决问题。

Answer 2

目前没有简单的方法。另见https://github.com/angular/angular/issues/6985

Angular 2: getting RouteParams from parent component 提供了一些解决方法。