Angular 6错误：没有模块工厂可用于依赖类型：ContextElementDependency

Question

问题：当我进行构建时，我收到此错误：

No module factory available for dependency type: ContextElementDependency
Error: No module factory available for dependency type: ContextElementDependency
    at addDependency (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:696:12)
    at iterationOfArrayCallback (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:194:3)
    at addDependenciesBlock (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:714:5)
    at iterationOfArrayCallback (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:194:3)
    at addDependenciesBlock (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:717:5)
    at Compilation.processModuleDependencies (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:725:4)
    at afterBuild (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:857:15)
    at buildModule.err (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:901:11)
    at callback (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:630:5)
    at module.build.error (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:678:12)
    at resolveDependencies (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/ContextModule.js:282:4)
    at ContextModule.result.resolveDependencies (/Users/kazuar/Projects/EducationFrontEnd/node_modules/@ngtools/webpack/src/angular_compiler_plugin.js:504:25)
    at ContextModule.build (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/ContextModule.js:203:8)
    at Compilation.buildModule (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:635:10)
    at factory.create (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/Compilation.js:884:14)
    at hooks.afterResolve.callAsync (/Users/kazuar/Projects/EducationFrontEnd/node_modules/webpack/lib/ContextModuleFactory.js:163:16)

我首先要说的是，只有当我将路由从急切加载更改为延迟加载时才会启动此问题。当我试图回到急切的装载时，我没有遇到这个问题所以它可能与之相关，但我不知道是什么导致它

这是我的路由表在预测加载时的样子：

// Routing array - using eager loading
const appRoutes: Routes = [
  { path: 'login/:id', canActivate: [AuthGuard], children: [] },
  { path: '', canActivateChild: [AuthGuard], children: [
    { path: '', redirectTo: '/courses', pathMatch: 'full' },
    { path: 'courses', component: CourseListComponent,  pathMatch: 'full'},
    { path: 'courses/:courseId', component: CourseDetailComponent, pathMatch: 'full' },
    { path: 'courses/:courseId/unit/:unitId', component: CoursePlayComponent,
      children: [
        { path: '', component: CourseListComponent },
        { path: 'lesson/:lessonId', component: CourseLessonComponent, data:{ type: 'lesson'} },
        { path: 'quiz/:quizId', component: CourseQuizComponent, data: {type: 'quiz'} }
      ]}
    ]},
  { path: 'welcome', component: LandingPageComponent, pathMatch: 'full' },
  { path: '**', component: PageNotFoundComponent, pathMatch: 'full' }];

这是延迟加载：

// app-routing.module

const routes:Routes = [
  { path: 'welcome', component: LandingPageComponent, pathMatch: 'full' },
  { path: 'login/:id', canActivate: [AuthGuard], children: [] },
  { path: '', canActivateChild: [AuthGuard], children: [
    { path: '', redirectTo: '/courses', pathMatch: 'full' },
    { path: 'courses', loadChildren: './courses/course.module#CourseModule', canLoad: [AuthGuard] }
  ]},
  { path: '**', component: PageNotFoundComponent, pathMatch: 'full' }
]


// course-routing.module

const routes:Routes = [
  {
    path: '',
    component: CourseListComponent,
    canActivate: [AuthGuard],
    canActivateChild: [AuthGuard],
    children:[
      { path: '', redirectTo: '/courses', pathMatch: 'full' },
      { path: ':courseId', component: CourseDetailComponent, pathMatch: 'full' },
      { path: ':courseId/unit/:unitId', component: CoursePlayComponent,
        children: [
          { path: '', component: CourseListComponent },
          { path: 'lesson/:lessonId', component: CourseLessonComponent, data:{ type: 'lesson'} },
          { path: 'quiz/:quizId', component: CourseQuizComponent, data: {type: 'quiz'} }
      ]}
  ]}
]

auth.guard：

import { Injectable } from '@angular/core';
import { Observable, throwError } from 'rxjs';
import { Router, CanActivate, CanActivateChild, CanLoad, ActivatedRouteSnapshot, RouterStateSnapshot, NavigationExtras, Route } from '@angular/router';
import { AuthUserService } from './users/auth-user.service';
import { LocalStorage } from '@ngx-pwa/local-storage';

@Injectable()
export class AuthGuard implements CanActivate , CanActivateChild {

    constructor(private authUserService: AuthUserService, private router: Router) {   }

    canActivate(route: ActivatedRouteSnapshot, state:
       RouterStateSnapshot): boolean |
       Observable<boolean> | Promise<boolean> {
         // save the id from route snapshot
         const id = +route.params.id;
         const course_id = +route.params.courseId;

         // if you try to logging with id
         if (id) {
           this.router.navigate(["/courses"]);
           return this.authUserService.login(id);
         }
         // if you're already logged in and navigate between pages
         else if (this.authUserService.isLoggedIn()){
           if (course_id){
             // check if someone try to access a locked course
             if (this.authUserService.isCourseNotPartOfTheSubscription(course_id)){
               this.router.navigate(["/welcome"]);
               return false;
             }
             else
               return true;
           }
           else
             return true;
         }
         else {
           this.router.navigate(["/welcome"]);
           return false;
         }
        }

      canActivateChild(route: ActivatedRouteSnapshot,state: RouterStateSnapshot): boolean |
      Observable<boolean> | Promise<boolean> {
         return this.canActivate(route, state);
       }

       canLoad(route: ActivatedRouteSnapshot,state: RouterStateSnapshot): boolean |
       Observable<boolean> | Promise<boolean> {
         return this.canActivate(route, state);
       }
}

我在正确的位置添加了导入，并遵循3个不同的教程。我真的不知道是什么问题。谢谢你们

Answer 1

我解决了它，我的webpack没有更新，并且不支持延迟加载所以我删除了它并安装了最新版本并且它工作正常