Angular 错误 : Please add a @NgModule annotation

Question

我是 Angular 的新手，我正在尝试编写一个简单的模块化应用程序。但是我收到以下错误:

Uncaught Error: Unexpected directive 'SomeComponent' imported by the module 'SomeModule'. Please add a @NgModule annotation.

基本上，我不想导入app.module.ts中的所有服务和组件，我想模块化代码但我失败了。

这是app.module.ts

@NgModule({
  declarations: [
    AppComponent,
    HomeComponent
  ],
  imports: [
    BrowserModule,
    RouterModule.forRoot(appRoutes),
    HttpClientModule,
    ReactiveFormsModule,
    SomeModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule {
}

这是嵌套模块:

@NgModule({
  imports: [
    CommonModule,
    SomeComponent
  ],
  providers: [SomeService],
  declarations: [],
  exports: [SomeComponent]
})
export class SomeModule {
}

这是嵌套组件:

@Component({
  selector: 'app-index',
  templateUrl: './some.component.html',
  styleUrls: ['./some.component.css']
})
export class SomeComponent implements OnInit {

  somes: Array<ISome>;

  constructor(private http: HttpClient, private service: SomeService) {}

  ngOnInit() {
    this.getSomes();
  }

  getSomes() {
    this.service.getSomes().subscribe(res => {
      this.somes = res;
    });
  }
}

Answer 1

您正在尝试“导入”SomeModule 中的组件。

imports: [
  CommonModule,
  SomeComponent
],

您导入模块并声明组件，这正是错误消息告诉您的内容——您尝试导入指令SomeComponent。

Unexpected directive 'SomeComponent' imported by the module 'SomeModule'.

将 SomeComponent 从 imports 移到 declarations。

imports: [
  CommonModule,
],
providers: [SomeService],
declarations: [
  SomeComponent,
],