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

Question

The problem: When I do ng build I get this error:

 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) 

I'd like to say first that this problem started only when I changed the routing to lazy loading from eager loading. When I tried to go back to eager loading, I didn't have this problem so it's probably connected to that, but I don't know what caused it

This is how my routing table looked like with eager loading:

 // 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' }]; 

This is with lazy loading:

 // 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); } } 

I added import on the right places and followed 3 different tutorials. I really don't know what's the problem. Thank you all

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