Angular TypeError:undefined在导入两个模块时不是函数

我使用的是

Angular 6

我在LayoutModule下有两个布局模块（AdminLayout和AuthLayout）

AdminLayoutModule的内容是

@NgModule({
  imports: [
    CommonModule,
    RouterModule.forChild(AdminLayoutRoutes),
    FormsModule,
    DashboardModule
  ],
  declarations: [
    AdminLayoutComponent
  ]
})
export class AdminLayoutModule { }

管理布局.路由.ts

export const AdminLayoutRoutes: Routes = [
  { path: 'dashboard', loadChildren: '../../dashboard/dashboard.module#DashboardModule' }
];

export const AuthLayoutRoutes: Routes = [
  { path: '', redirectTo: 'login', pathMatch: 'full'},
  { path: 'login', component: LoginComponent},
  { path: 'logout', component: LogoutComponent}
];

并且admin layout.component.html已经

<h2>admin-layout works!</h2>

<router-outlet></router-outlet>

auth layout.routing.ts

export const AdminLayoutRoutes: Routes = [
  { path: 'dashboard', loadChildren: '../../dashboard/dashboard.module#DashboardModule' }
];

export const AuthLayoutRoutes: Routes = [
  { path: '', redirectTo: 'login', pathMatch: 'full'},
  { path: 'login', component: LoginComponent},
  { path: 'logout', component: LogoutComponent}
];

auth layout.component.html

<h2>auth-layout works!</h2>

<router-outlet></router-outlet>

在AppModule中进一步导入

@NgModule({
  imports: [
    CommonModule,
    RouterModule.forChild(AuthLayoutRoutes),
    FormsModule,
    AuthModule
  ],
  declarations: [
    AuthLayoutComponent
  ],
  exports: [
    RouterModule
  ]
})
export class AuthLayoutModule { }

@NgModule({
  imports: [
    CommonModule,
    AdminLayoutModule,
    AuthLayoutModule
  ],
  declarations: []
})
export class LayoutsModule { }

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    AppRoutingModule,

    LayoutsModule,

    HttpClientModule,
    RouterModule,
    PagesModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

但当我运行服务器时，它在编译期间不会给出任何错误，但在浏览器中访问URL时会给出错误

core.js:1673 ERROR Error: Uncaught (in promise): TypeError: undefined is not a function
TypeError: undefined is not a function
    at Array.map (<anonymous>)
    at webpackAsyncContext ($_lazy_route_resource lazy namespace object:21)
    at SystemJsNgModuleLoader.push../node_modules/@angular/core/fesm5/core.js.SystemJsNgModuleLoader.loadAndCompile (core.js:4982)
    at SystemJsNgModuleLoader.push../node_modules/@angular/core/fesm5/core.js.SystemJsNgModuleLoader.load (core.js:4974)
    at RouterConfigLoader.push../node_modules/@angular/router/fesm5/router.js.RouterConfigLoader.loadModuleFactory (router.js:3261)
    at RouterConfigLoader.push../node_modules/@angular/router/fesm5/router.js.RouterConfigLoader.load (router.js:3249)
    at MergeMapSubscriber.project (router.js:1519)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._tryNext (mergeMap.js:61)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._next (mergeMap.js:51)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next (Subscriber.js:54)
    at Array.map (<anonymous>)
    at webpackAsyncContext ($_lazy_route_resource lazy namespace object:21)
    at SystemJsNgModuleLoader.push../node_modules/@angular/core/fesm5/core.js.SystemJsNgModuleLoader.loadAndCompile (core.js:4982)
    at SystemJsNgModuleLoader.push../node_modules/@angular/core/fesm5/core.js.SystemJsNgModuleLoader.load (core.js:4974)
    at RouterConfigLoader.push../node_modules/@angular/router/fesm5/router.js.RouterConfigLoader.loadModuleFactory (router.js:3261)
    at RouterConfigLoader.push../node_modules/@angular/router/fesm5/router.js.RouterConfigLoader.load (router.js:3249)
    at MergeMapSubscriber.project (router.js:1519)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._tryNext (mergeMap.js:61)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/operators/mergeMap.js.MergeMapSubscriber._next (mergeMap.js:51)
    at MergeMapSubscriber.push../node_modules/rxjs/_esm5/internal/Subscriber.js.Subscriber.next (Subscriber.js:54)
    at resolvePromise (zone.js:814)
    at resolvePromise (zone.js:771)
    at zone.js:873
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:421)
    at Object.onInvokeTask (core.js:3811)
    at ZoneDelegate.push../node_modules/zone.js/dist/zone.js.ZoneDelegate.invokeTask (zone.js:420)
    at Zone.push../node_modules/zone.js/dist/zone.js.Zone.runTask (zone.js:188)
    at drainMicroTaskQueue (zone.js:595)

---

您不应将延迟加载的模块导入应用程序模块

  imports: [
    BrowserModule,
    FormsModule,
    AppRoutingModule,
    LayoutsModule,  //Remove this if this is your lazy load module
    HttpClientModule,
    RouterModule,
    PagesModule
  ],

---

查看

哪个路由会给您带来此错误？我无法访问任何路由，访问任何路由会将我重定向回控制台中出现此错误的

localhost:4100

。如果我们的功能模块不应导入

app module

中，那么我们应该在哪里导入它呢？LayoutModule是保存其他模块的模块。它是从AdminLayout加载仪表板或从AuthModule加载LoginPage的主模块。删除LayoutModule后，会出现错误“未捕获错误：组件LayoutComponent不是任何NgModule的一部分，或者该模块尚未导入到您的模块中。”