Question

我想基于用户角色在同一（“”）路径（主页）上加载特定的Angular模块。假设我有两个名为AdminModule和OperatorModule的模块。如果角色是ADMIN，则我要加载AdminModule，否则要加载OperatorModule。我想使用Angular Guard将其存档。

现在在app.routing.ts中，我添加了以下代码：

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

import { AuthGuard } from './core/guards/auth.guard';

import { AdminModule } from './modules/admin';
import { OperatorModule } from './modules/operator';

const routes: Routes = [
   {
      path: '',
      loadChildren: () => AdminModule,
      canLoad: [ AuthGuard ],
      data: { role: 'ADMIN' }
   },

   {
      path: '',
      loadChildren: () => OperatorModule,
      canLoad: [ AuthGuard ],
      data: { role: 'OPERATOR' }
   },
];

@NgModule({
  imports: [RouterModule.forRoot(routes)],
  exports: [RouterModule]
})
export class AppRoutingModule { }

我用以下代码实现了AngularGuard，该代码必须显示OperatorModule：

import { Injectable } from '@angular/core';
import { CanLoad, Route, Router } from '@angular/router';

@Injectable({
   providedIn: 'root'
})
export class AuthGuard implements CanLoad {
   constructor(private router: Router) {}

   canLoad(route: Route): Promise<boolean> | boolean {
      if (route.data.role === 'OPERATOR') {
         return true;
      }

      return false;
   }
}

第一条路线失败后，它会以某种方式停止寻找，我做错了什么吗？

djerid的StackBlitz示例：https://stackblitz.com/edit/angular-vd4oyu?file=app%2Fapp-routing.module.ts

===

Matcher也不起作用：

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';

import { AuthGuard } from './core/guards/auth.guard';

import { AdminModule } from './modules/admin';
import { OperatorModule } from './modules/operator';

const routes: Routes = [
   {
      loadChildren: () => AdminModule,
      matcher: AdminMatcher,
      data: { role: 'NO' }
   },

   {
      loadChildren: () => OperatorModule,
      matcher: OperatorMatcher,
      data: { role: 'OPERATOR' }
   },
];

@NgModule({
   imports: [RouterModule.forRoot(routes)],
   exports: [RouterModule]
})
export class AppRoutingModule {
   constructor() {

   }
}


import { UrlSegment, UrlSegmentGroup, Route } from '@angular/router';
export function AdminMatcher(segments: UrlSegment[], group: UrlSegmentGroup, route: Route) {
   const isPathMatch = segments[0].path === route.path;

   if (isPathMatch && route.data.role === 'ADMIN') {
      return { consumed: [segments[0]] };
   } else {
      return null;
   }
}

export function OperatorMatcher(segments: UrlSegment[], group: UrlSegmentGroup, route: Route) {
   const isPathMatch = segments[0].path === route.path;

   if (isPathMatch && route.data.role === 'OPERATOR') {
      return { consumed: [segments[0]] };
   } else {
      return null;
   }
}

Answer 1

最好是使用UrlMatchers而不是canLoad，以根据您的条件匹配每一个，当两个路径之一匹配时，另一个将自动被忽略

 const routes: Routes = [{
  path: '',
  matcher: adminMatcher,
  oadChildren: () => AdminModule,
  data: { role: 'ADMIN' }
 },
 {
  path: '',
  matcher: operatormatcher,
  loadChildren: () => OperatorModule,
  data: { role: 'OPERATOR' }

 }]

选中此example

Answer 2

这是一个古老的问题，但是如果有人偶然发现了这个问题，我在这里留下一个答案。我通过在延迟加载的路由中使用根模块的injector解决了这个问题。

您可以在stackblitz上查看有效的解决方案。

解决方案

步骤1

创建一个导出ReplaySubject<Injector>的新文件。

import { Injector } from '@angular/core';
import { ReplaySubject } from 'rxjs';

// Feel free to optimize this implementation if you want to
// expose `Observable<Injector>` instead of the subject itself.
export const appInjector = new ReplaySubject<Injector>();

步骤2

在main.ts中，获取根模块Injector的句柄，并将其发布到您在上面创建的appInjector主题中：

platformBrowserDynamic()
  .bootstrapModule(AppModule)
  .then((m) => appInjector.next(m.injector)) // publish root module's injector
  .catch((err) => console.error(err));

步骤3

这是我们修改路由的步骤，该路由需要基于某些异步条件异步延迟加载不同的模块。

const routes: Routes = [
  // other routes
  // ...
  // ...
  // conditional route
  {
    path: "dashboard",
    component: LayoutComponent,
    canActivate: [DashboardAuthGuard], // block this route if user is not logged-in
    loadChildren: () =>
    
      // Use the appInjector subject
      appInjector.pipe(
        
        // ...to get a handle to your AuthService
        map((injector) => injector.get(AuthService)),
        
        // ...then switch to a new observable
        switchMap((authService) => {
          
          // ...that uses authService to retrieve the logged-in user
          return authService.user$.pipe(
            
            // ...then switches again, this time to actually lazy-load a feature module
            switchMap((user) => {
              
              // ...but first let's check the user's role
              switch (user.role) {
                
                // ...and load Admin Feature Module if user.role is 'admin'
                case "admin":
                  return import(
                    "./modules/admin-dashboard/admin-dashboard.module"
                  ).then((m) => m.AdminDashboardModule);
                
                // ...or load User Feature Module if user.role is 'user'
                case "user":
                  return import(
                    "./modules/user-dashboard/user-dashboard.module"
                  ).then((m) => m.UserDashboardModule);
              }
            })
          );
        })
      ),
  },
];

基于防护的同一路径上的延迟加载模块

2 个答案:

解决方案

步骤1

步骤2

步骤3