组件不是任何 NgModule 的一部分，或者模块尚未导入到模块中(延迟加载)

Question

我正在开发 Angular7 应用程序，并收到一个奇怪的错误，我的组件"x"不是任何 NgModule 的一部分，或者模块尚未导入您的模块。

组模块：

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule } from '@angular/forms';
import { GroupRoutingModule } from './group-routing.module';
import { GroupComponent } from './group/group.component';
import { GroupListComponent } from './group-list/group-list.component';
@NgModule({
  declarations: [
   GroupComponent,
   GroupListComponent 
  ],
  imports: [
     CommonModule,
     FormsModule,
     GroupRoutingModule
  ],
  exports: [
    GroupComponent,
    GroupListComponent 
  ]
})
export class GroupModule { }

用户模块：

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { CorrCommonModule } from '../../../common/common.module';
import { FormsModule } from '@angular/forms';
import { UserComponent } from './user/user.component';
import { UserRoutingModule } from './user-routing.module';

@NgModule({
  declarations: [
    UserComponent    
  ],
  entryComponents: [
  ],
  imports: [
     CommonModule,
     FormsModule,
     UserRoutingModule
  ],
  exports: [
    UserComponent        
  ]
})
export class UserModule { }

然后将这两个模块添加到安全模块中，该模块是延迟加载模块。

安全模块：

import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { FormsModule} from '@angular/forms';
import { SecurityRoutingModule } from './security-routing.module';
import { UserModule } from './components/user/user.module';
import { GroupModule } from './components/group/group.module';

@NgModule({
  declarations: [
  ],
    entryComponents: [
    ],
    exports: [
    ],
  imports: [
    CommonModule,
    FormsModule,
    SecurityRoutingModule,
    GroupModule,
    UserModule
  ],
  providers: []
})
export class SecurityModule {}

用户路由模块：

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { UserComponent } from './user/user.component';
import { GroupListComponent } from '../group/group-list/group-list.component';
const Routes: Routes = [
  {
    path: 'user',
    component: UserComponent
    },
     {
       path: 'group',
       component: GroupListComponent
     }
];
@NgModule({
  imports: [RouterModule.forChild(Routes)],
  exports: [RouterModule]
})
export class UserRoutingModule { }

现在，当我在用户路由模块中使用GroupListComponent时，我遇到组件不是任何NgModule的一部分或模块尚未导入

模块的问题

编辑

该模块也使用类似的方法，但没有这样的问题。

import { NgModule } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { CountryComponent } from './country/country.component';
import { CurrencyListComponent } from '../currency/currency-list/currency-list.component';
import { SetupLogComponent } from '../log/setup-log/setup-log.component';
import { RegionListComponent } from '../region/region-list/region-list.component';
import { CityPlaceListComponent } from '../city-place/city-place-list/city-place-list.component';


const Routes: Routes = [
  {
    path: 'country',
    component: CountryComponent
  },
  {
     path: '', pathMatch: 'full',
     component: CountryDetailComponent
     },
     {
     path: 'region',
     component: RegionListComponent
     },
     {
     path: 'currency',
     component: CurrencyListComponent
     },
     {
     path: 'cityplace',
     component: CityPlaceListComponent
     }];


@NgModule({
  imports: [RouterModule.forChild(Routes)],
  exports: [RouterModule],
  declarations: []
})
export class CountryRoutingModule { }

编辑2：应用路由中的部分代码

{path: 'security',  loadChildren: './modules/security/security.module#SecurityModule', data: { preload: true }},
{path: 'setup', loadChildren: './modules/setup/setup.module#SetupModule', data: { preload: true }},

Answer 1

现在，当我在用户路由模块中使用GroupListComponent时，我遇到组件不是任何NgModule的一部分或模块尚未导入

模块的问题

您的用户路由模块不会导入GroupModule为什么您不能使用它。

@NgModule({
  imports: [GroupModule, RouterModule.forChild(Routes)],
  exports: [RouterModule]
})
export class UserRoutingModule { }