Angular2-router:如何只修改路由的一个参数？

Question

我希望在我的应用程序中包含以下路由：

export const routes: Routes = [
    { 
       path: ':universityId', 
       component: UniversityComponent,
       children: [
           { path: 'info', component: UniversityInfoComponent },
           { path: 'courses/:status', component: CoursesByStatusComponent }
       ]
    }
]

在/1/info或/1/courses/open url上，如何仅从UniversityComponent更改:universityId

简单的router.navigate(['../', 2], {relativeTo: currentRoute })不能这样做，因为它会重定向到/2，丢失所有其他信息。使用'../2/courses/open也不是一种选择--那时我可以在任何子路由上。我能想到的最好的办法是：

const urlTree = this.router.parseUrl(this.router.url);
urlTree.root.children['primary'].segments[0].path = '2';
this.router.navigateByUrl(urlTree);

但这有点丑陋

Answer 1

这非常简单。您可以尝试使用this.router.navigate("../2"，“课程”，"open"，{relativeTo: this.route})；

(或)

this.router.navigate("../2"，“课程/开放”，{relativeTo: this.route})；

这会将您重定向到../2/courses/open。

Answer 2

下面是我上面关于使用元组的评论中的一些代码:所以将这个模式复制两次……该shows如何将这些类集成到您的项目中。所以：

对于链接中的代码，请将data-component-resolver.ts更改为parent-child-resolver.ts。

• 将链接中的data-component.ts替换为

下的parent-child.component.ts

parent-child-resolver.ts

import {Injectable} from '@angular/core';
import {Observable} from 'rxjs';
import {Resolve, ActivatedRouteSnapshot, RouterStateSnapshot} from '@angular/router';
import {Parent} from '../shared/model/parent';
import {Children} from '../shared/model/children';
import {ParentService} from '../providers/parent.service';

@Injectable()
export class parentChildResolver implements Resolve<[Parent,(Children[])>

  constructor(private parentService : ParentService) {}

  resolve(  route: ActivatedRouteSnapshot,
            state: RouterStateSnapshot
         ) : Observable<[Parent,(Children[])> 
  {
      return this.parentService.findParentById(route.params['id'])
        .switchMap(parent => 
            this.parentService.findChildrenForParent(parent.id),
              (parent, children) => [parent, children]
         );
  }
}

parent-child.component.ts

import {Component, OnInit} from '@angular/core';
import {Parent} from '../shared/model/parent';
import {Children} from '../shared/model/children';
import {Observable} from 'rxjs';
import {ActivatedRoute} from '@angular/router';

@Component({
    selector: 'parent-child',
    templateUrl: './parent-child.component.html'
})

export class ParentChildComponent implements OnInit{
  $parent: Observable<Parent>;
  $children: Observable<Children[]>;

  constructor(private route:ActivatedRoute) {}

  ngOnInit() {
    this.parent$ = this.route.data.map(data => data['key'][0]); //from router.config.ts
    this.children$ = this.route.data.map(data => data['key'][1]);
  }
}