Angular:根据服务方法调用设置路由 [英] Angular: Setup routes depending on service method call

问题描述

我通过 @NgModule 设置了路由配置.我有一项服务，可以根据特定条件确定应向用户显示应用程序的哪些部分.我需要调用该服务并根据返回值设置路由.

I have route configuration set up via @NgModule. And I have a service that identifies what parts of the application should be shown for the user depending on certain conditions. I need to call that service and setup the routes according to the returned value.

问题:路由配置是在注释中设置的，我无法在这样的设置中调用服务.

Problem: Route configuration is setup inside an annotation and I can't get how to call the service in such setup.

更具体地说，这里是我想要增强的示例配置.

To be more specific here is the example configuration I want to enhance.

我当前的路由设置:

const appRoutes: Routes = [
    {
        path: '',
        redirectTo: 'first-route',
        pathMatch: 'full'
    },
    {
        path: 'first-route',
        component: FirstComponent,
        pathMatch: 'full'
    },
    {
        path: 'second-route',
        component: SecondComponent,
        pathMatch: 'full'
    },
    ...
];

@NgModule({
    imports: [RouterModule.forChild(appRoutes)],
    exports: [RouterModule]
})
export class MyRoutingModule {
}

应该改变路由设置的服务:

The service that should change the route setup:

@Injectable()
export class MyService {
    getAccessibleRoutes(): Observable<string[]> {...}
}

问题:如何拨打服务电话并更改路线?

Question: How can I make a service call and change the routes?

注意:我还查看了在 Angular 中动态添加路由" 和 "我们如何将新路由动态添加到 RouterModule(@NgModule 导入)" 但我没有在那里找到了明确的答案.

Note: I also looked on "Dynamically adding routes in Angular" and "How we can add new routes dynamically into RouterModule(@NgModule imports)" but I haven't found clear answer there.

推荐答案

如果我正确理解了你的问题，我想你可能可以考虑使用路由守卫来达到你的目标.建议您使用guards功能来指定访问路由的条件，而不是更改路由列表.

If I correctly understood your problem, I think you probably can consider using route guards to reach you goal. I suggest you to use guards feature to specify the conditions of accessing your routes, instead of changing the list of routes.

有关路线守卫的更多信息，请查看此链接:

Please check this link for more information about route guards:

https://codecraft.tv/courses/angular/routing/router-守卫/

希望对你有所帮助.

import { Injectable } from '@angular/core';
import { CanActivate, Router, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';
import { YourSecurityService } from './your-security.service';

@Injectable()
export class YourRouteGuardService implements CanActivate {

    constructor(
        private router: Router, 
        private yourSecurityService: YourSecurityService) {
    }

    canActivate(
        route: ActivatedRouteSnapshot, 
        state: RouterStateSnapshot): boolean {

        console.log(state.url); // HERE YOU CAN GET REQUESTED ROUTE

        if (this.yourSecurityService.checkIfUserHaveAccess())
            return true;

        this.router.navigate(['your-route-to-redirect']);
        return false;
    }
 }

接下来你应该在你的路线上应用你的守卫:

Next you should apply your guard to your route:

const appRoutes: Routes = [
    {
        path: 'someroute',
        component: RouteComponent,
        canActivate: [YourRouteGuardService]
    },
    ...
]

这篇关于Angular:根据服务方法调用设置路由的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！