属性 'todos' 在类型 'Object' 上不存在

Property 'todos' does not exist on type 'Object'

我正在构建我的第一个 MEAN 堆栈来做应用程序。我希望我能正确地表达我的问题,因为我是新手。

错误来自我的 getList().subscribe 函数。我想我明白错误试图告诉我什么,但我不知道如何解决它。我试过分配

todos: any;

但这没有用。然后我尝试分配

todos: Array<any>;

和许多其他不同的语法;没有运气。

dashboard.component.ts

export class DashboardComponent implements OnInit {
  user: Object;

  lists: any;
  todos: any;

  @Input() input;

  @Output() update = new EventEmitter();

  constructor(
    private authService: AuthService,
    private flashMessage: FlashMessagesService,
    private listService: ListService
  ) { }

  ngOnInit() {
    this.getLists();

    this.authService.getProfile().subscribe(profile => {
      this.user = profile.user;
    },
    err => {
      console.log(err);
      return false;
    });
  }

  getLists(): void {
    this.listService.getAllTodos()
      .subscribe(data => this.lists = data.todos);
  }

list.service.ts

export class ListService {
  newTodo: any;
  list: any;

  constructor(private http: HttpClient) { }

  getAllTodos() {
    return this.http.get('http://localhost:3000/todos/lists');
  }

编辑 ================================== ================

这是我的自定义 interface/class 模型,我尝试更改编码以订阅 observable

List.ts

export class List {
  item: string;
  completed: boolean;
}

更改为我的旧文件

dashboard.component.ts

import { List } from '../../list';

export class DashboardComponent implements OnInit {

  lists: List;

getLists(): void {
    this.listService.getAllTodos()
      .subscribe((data: List) => this.lists = data.todos);
  }

除了类型从 'Object' 更改为 'List'

外,我仍然在主题行中收到相同的错误
Property 'todos' does not exist on type 'List'

您可以自定义 interface/class 来映射响应。或者在访问 todos 之前使用 any 类型。

 this.listService.getAllTodos()
      .subscribe((data:any) => this.lists = data.todos);