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Angular2错误：模块导出的意外值'AuthGuard' 'AppModule'

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我正在努力寻找我面临的这个问题的解决方案 . 我试图将警卫放在我在外部路由文件中设置的特定路由上 . 此保护是检查用户是否已登录以访问此路由或用户被重定向到登录屏幕 .

这是我的app.module.ts文件：

import { NgModule } from '@angular/core'; 
import { RouterModule } from '@angular/router'; 
import { UniversalModule } from 'angular2-universal'; 
import { AppComponent } from './app.component'; 
import { Routing } from './app.routing';


import { LoginComponent } from './shared/login/login.component'; 
import { DashboardComponent } from './dashboard/dashboard.component';


import { AuthGuard } from './shared/login/auth-guard.service'; 
import { AuthService } from './shared/login/auth.service';

    @NgModule({
        bootstrap: [ AppComponent ],
        declarations: [
            AppComponent,
            LoginComponent,
            DashboardComponent
        ],
        imports: [
            UniversalModule,
            Routing
        ],
        exports: [
            AuthGuard,
            AuthService
        ] }) export class AppModule { }

我想要导入auth-gaurd.service和auth.service并且需要导出两者，好像我从导出中排除它我得到一个错误，说需要导出AuthGuard .

这是我的路由文件：

import { Router, RouterModule } from '@angular/router';

import { AuthGuard } from './shared/login/auth-guard.service';

import { DashboardComponent } from './dashboard/dashboard.component';
import { LoginComponent } from './shared/login/login.component';


export const Routing = RouterModule.forRoot([ 
    { path: '', component: DashboardComponent, canActivate: [AuthGuard] }, 
    { path: 'login', component: LoginComponent},
])

最后，这是我的AuthGuard服务，它与auth服务进行通信，如果用户已登录，则 isLoggedIn 设置为true .

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

import { AuthService } from './auth.service';


@Injectable()
export class AuthGuard implements CanActivate {
    constructor(private _authService: AuthService, private _router: Router) {

    }

    canActivate() { // Route gaurd
        if (this._authService.isLoggedIn) { 
            return true;
        } else {
            this._router.navigate(['login']); 
            return false;
        }
    }
}

这是堆栈错误消息：

Exception: Call to Node module failed with error: Error: Unexpected value 'AuthGuard' exported by the module 'AppModule'
at G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\@angular\compiler\bundles\compiler.umd.js:14153:33
at Array.forEach (native)
at CompileMetadataResolver.getNgModuleMetadata (G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\@angular\compiler\bundles\compiler.umd.js:14136:46)
at RuntimeCompiler._compileComponents (G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\@angular\compiler\bundles\compiler.umd.js:16803:49)
at RuntimeCompiler._compileModuleAndComponents (G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\@angular\compiler\bundles\compiler.umd.js:16741:39)
at RuntimeCompiler.compileModuleAsync (G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\@angular\compiler\bundles\compiler.umd.js:16732:23)
at NodePlatform.bootstrapModule (G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\angular2-platform-node\node-platform.js:436:25)
at NodePlatform.serializeModule (G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\angular2-platform-node\node-platform.js:108:22)
at G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\ClientApp\dist\main-server.js:74:63
at ZoneDelegate.invoke (G:\HaldanMT-WebApp\HaldanMT-WebApp\HaldanMT-WebApp\node_modules\zone.js\dist\zone-node.js:232:26)

任何帮助将不胜感激 . 感谢名单

angular angular2-routing

1 回答

  • 2

    您需要在ngModule中的 providers 部分中添加 AuthGuard 和 AuthService ，而不是在 exports 中，或者从angular团队查看本教程中的ROUTING & NAVIGATION .

    教程中的代码示例：

    import { AuthGuard }                from '../auth-guard.service';

@NgModule({
  imports: [
    RouterModule.forChild([
      {
        path: 'admin',
        component: AdminComponent,
        canActivate: [AuthGuard],
        children: [
          {
            path: '',
            children: [
              { path: 'crises', component: ManageCrisesComponent },
              { path: 'heroes', component: ManageHeroesComponent },
              { path: '', component: AdminDashboardComponent }
            ],
          }
        ]
      }
    ])
  ],
  exports: [
    RouterModule
  ]
})
export class AdminRoutingModule {}
    回复于

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