Angular Error: 'Component 'X' is not included in a module...' when declared in a sub module

Question

我正在尝试将我的对话整合到一个 Angular 模块中，但我在 IDE:

中遇到了 linting 错误

Component 'X' is not included in a module and will not be available inside a template. Consider adding it to an NgModule declaration.

尽管出现此错误，应用程序仍能成功加载和运行。

示例组件定义

import { Component, Inject, OnInit, ViewEncapsulation } from '@angular/core';
import { MAT_DIALOG_DATA, MatDialogRef } from '@angular/material';

export interface AlertDialogData {
  titleText: string;
  dismissalText: string;
  contentComponent: string;
}

@Component({
  selector: 'app-alert-dialog',
  templateUrl: './alert-dialog.component.html',
  styleUrls: ['./alert-dialog.component.scss'],
  encapsulation: ViewEncapsulation.None
})
export class AlertDialogComponent implements OnInit {

  constructor(private dialogRef: MatDialogRef<AlertDialogComponent>, @Inject(MAT_DIALOG_DATA) public data: any) { }

  ngOnInit() {
  }

  handleCloseClick(): void {
    this.dialogRef.close();
  }

}

制作子模块Declaration/Export

import { CUSTOM_ELEMENTS_SCHEMA, NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { ZipLocatorDialogComponent } from './zip-locator-dialog/zip-locator-dialog.component';
import { AlertDialogComponent } from './alert-dialog/alert-dialog.component';
import { HelperDialogComponent } from './helper-dialog/helper-dialog.component';
import {
  MatAutocompleteModule, MatButtonModule, MatDialogModule, MatFormFieldModule, MatInputModule,
  MatSelectModule
} from '@angular/material';
import { FlexLayoutModule } from '@angular/flex-layout';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';

@NgModule({
  imports: [
    CommonModule,
    FlexLayoutModule,
    FormsModule,
    ReactiveFormsModule,
    MatDialogModule,
    MatInputModule,
    MatFormFieldModule,
    MatSelectModule,
    MatAutocompleteModule,
    MatButtonModule
  ],
  exports: [
    ZipLocatorDialogComponent,
    HelperDialogComponent,
    AlertDialogComponent
  ],
  declarations: [
    ZipLocatorDialogComponent,
    HelperDialogComponent,
    AlertDialogComponent
  ],
  entryComponents: [
    ZipLocatorDialogComponent,
    HelperDialogComponent,
    AlertDialogComponent
  ],
  schemas: [
    CUSTOM_ELEMENTS_SCHEMA
  ]
})
export class AppDialogsModule { }

应用模块

// <editor-fold desc="Global Application Imports">
import { BrowserModule } from '@angular/platform-browser';
import { NgModule, CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
import { FormsModule } from '@angular/forms';
import { HTTP_INTERCEPTORS, HttpClientModule } from '@angular/common/http';
import { RouterModule } from '@angular/router';
import { RouteDefinitions } from './app.routes';
import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
import { FlexLayoutModule } from '@angular/flex-layout';
import { WebWrapperModule } from 'web-wrapper';
import { UiComponentsModule } from './ui-components.module';
import { AppComponent } from './app.component';


// OPERATORS
import './rxjs-operators';

// SERVICES
import { LoginManagerService } from './services/login-manager.service';
import { UtilsService } from './services/utils.service';
import { DataManagerService } from './services/data-manager.service';
import { ReferenceDataManagerService } from './services/reference-data-manager.service';
import { InfrastructureApiService } from './services/infrastructure-api.service';
// </editor-fold>

@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    BrowserAnimationsModule,
    FormsModule,
    FlexLayoutModule,
    HttpClientModule,
    WebWrapperModule,
    UiComponentsModule,
    AppDialogsModule,
    RouterModule.forRoot(RouteDefinitions)
  ],
  providers: [
    UtilsService,
    LoginManagerService,
    DataManagerService,
    InfrastructureApiService,
    ReferenceDataManagerService
  ],
  schemas: [
    CUSTOM_ELEMENTS_SCHEMA
  ],
  bootstrap: [AppComponent]
})
export class AppModule { }

版本

Angular CLI: 1.5.0
Node: 7.2.1
OS: win32 x64
Angular: 4.4.6
... animations, common, compiler, compiler-cli, core, forms
... http, language-service, platform-browser
... platform-browser-dynamic, router, tsc-wrapped

@angular/cdk: 2.0.0-beta.12
@angular/cli: 1.5.0
@angular/flex-layout: 2.0.0-beta.11-b01c2d7
@angular/material: 2.0.0-beta.12
@angular-devkit/build-optimizer: 0.0.32
@angular-devkit/core: 0.0.20
@angular-devkit/schematics: 0.0.35
@ngtools/json-schema: 1.1.0
@ngtools/webpack: 1.8.0
@schematics/angular: 0.1.2
typescript: 2.4.2
webpack: 3.8.1

Answer 1

首先：在 声明 部分 (app.module.ts) 中声明所有组件。

如果问题仍然存在，我记得那是 beta angular-cli 版本的问题。

The issue you are running into is a variant of the baseUrl issue. The language service does not correctly respect the baseUrl option. For example, if you change the import of the shared module from app/shared/shared.module to ../shared/shared.module then the errors go away.

Answer 2

将 @angular/language-service 添加为 dev-dpendency

或

做npm install @angular/language-service

可以确认这已在 v5.2.9 中修复。 YMMV 与早期版本。

Answer 3

我遇到了同样的问题，问题是这样解决的：

1) 转到 Intellij / IDE 设置并勾选（设置）重新编译更改为：

2) 转到 tsconfig.json 并将 compileOnSave 设置为 true :

现在删除导致问题的@Component，然后重新键入@Component。

这对我有用 :) 祝你好运。

Answer 4

错误来自 Angular 语言服务 (https://github.com/angular/angular/issues/14961)。您可以通过清除设置中的 Angular 语言服务复选框来禁用它 |语言与框架 |打字稿

https://intellij-support.jetbrains.com/hc/en-us/community/posts/360000014820-Component-is-not-includd-in-a-module-and-will-not-be-available-inside-a-template

Answer 5

对于遇到此错误的任何人，解决方案是将组件添加到 NgModule 声明中，该声明可以在 'module.ts' 文件中找到。

Answer 6

对我来说，在声明组件的模块中缺少 CommonModule 的导入时发生了同样的错误。

@NgModule({
    declarations: [ExampleComponent],
    imports: [CommonModule],
})
export class ExampleModule {}