ERROR TypeError: Cannot read property 'loadChildren' of undefined

Question

我刚刚添加了一些模块 + 路由 + AuthGuard 以重定向到那些（登录）页面。

一切似乎都正常（我可以导航到它们，页面之间的链接有效，AuthGuard 正确重定向），但我在 chrome 日志中收到此错误：

core.js:4197 ERROR TypeError: Cannot read property 'loadChildren' of undefined
    at RouterPreloader.processRoutes (router.js:5220)
    at RouterPreloader.processRoutes (router.js:5222)
    at RouterPreloader.preload (router.js:5208)
    at MergeMapSubscriber.project (router.js:5203)
    at MergeMapSubscriber._tryNext (mergeMap.js:46)
    at MergeMapSubscriber._next (mergeMap.js:36)
    at MergeMapSubscriber.next (Subscriber.js:49)
    at FilterSubscriber._next (filter.js:33)
    at FilterSubscriber.next (Subscriber.js:49)
    at Subject.next (Subject.js:39)

我正在使用 angular 10.0.14，不确定是什么导致了这个问题？

仅当我在其中一个新页面中时才会出现此问题。

这是我的授权模块：

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { LoginComponent } from './login/login.component';
import { AuthRoutingModule } from './auth-routing.module';
import { LostPasswordComponent } from './lost-password/lost-password.component';
import { SignupComponent } from './signup/signup.component';



@NgModule({
  declarations: [LoginComponent, SignupComponent, LostPasswordComponent, SignupComponent],
  imports: [
    CommonModule,
    AuthRoutingModule
  ]
})
export class AuthModule { }

这是 AuthRoutingModule：

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { LoginComponent } from './login/login.component';
import { LostPasswordComponent } from './lost-password/lost-password.component';
import { SignupComponent } from './signup/signup.component';

const routes: Routes = [
  {
    path: '',
    redirectTo: 'signin',
    pathMatch: 'full',
  },
  {
    path: 'signin',
    component: LoginComponent,
  },
  {
    path: 'signup',
    component: SignupComponent,
  },
  ,
  {
    path: 'lost-password',
    component: LostPasswordComponent,
  },
];

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

这些页面只是相互之间有链接的空页面，例如：

<p>login works!</p>
<a [routerLink]="['/auth/signup']" routerLinkActive="router-link-active" >Sign up instead</a>
<a [routerLink]="['/auth/lost-password']" routerLinkActive="router-link-active" >Password lost?</a>

如果我进入其他模块的页面之一，没有错误。

AppRouting 模块：

import { NgModule } from '@angular/core';
import { PreloadAllModules, RouterModule, Routes } from '@angular/router';
import { AuthGuard } from './auth/auth.guard';
const routes: Routes = [
  {
    path: '',
    redirectTo: 'folder/Inbox',
    pathMatch: 'full',
  },
  {
    path: 'folder/:id',
    loadChildren: () => import('./folder/folder.module').then((m) => m.FolderPageModule),
    canActivate: [AuthGuard],
  },
  {
    path: 'auth',
    loadChildren: () => import('./auth/auth.module').then((m) => m.AuthModule),
  },
];

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

知道问题出在哪里吗？或者如何解决？

Answer 1

您可以尝试导出 AuthRoutingModule:

@NgModule({
  declarations: [LoginComponent, SignupComponent, LostPasswordComponent, SignupComponent],
  imports: [
    CommonModule,
    AuthRoutingModule
  ],
  export: [AuthRoutingModule]
})
export class AuthModule { }

Answer 2

实际上错误是您 AuthRoutingModule 中多了一个逗号。删除它应该可以修复此错误。

  {
    path: 'signup',
    component: SignupComponent,
  },
  ,

Answer 3

在我们的例子中，我们只需要添加 aot 选项（我们的项目有点老）：

{
...
        "architect": {
        "build": {
          "builder": "@angular-devkit/build-angular:browser",
          "options": {
            "aot": true,
...

我们新添加了一些语法，并且 aot 选项在构建阶段提供帮助。将语法更改为传统方式也可以解决它。

ERROR TypeError: Cannot read property 'loadChildren' of undefined

ERROR TypeError: Cannot read property 'loadChildren' of undefined

angular

angular-ui-router

angular-routing