Angular 2组件注入服务:“[ts]属性不存在于类型上”

问题描述 投票:0回答:1

我是Angular 2中的菜鸟。我正在开发一个简单的应用程序。我在Angular 2应用程序中使用服务时遇到问题。当我想在组件上使用它时,我不能在ngOnInit()组件方法上使用getFavoritos()服务方法。

节点控制台显示以下消息:

src / app / favoritos-list / favoritos-list.component.ts(30,31)中的错误:错误TS2339:类型'typeof FavoritosService'上不存在属性'getFavoritos'。

这是我的服务:

favoritos.service.ts

import { Settings } from './../settings/settings';
import { Favorito } from './../models/favorito';
import { Injectable } from '@angular/core';
import { Http, Response, Headers } from '@angular/http';
import 'rxjs/add/operator/map' ;
import {Observable} from 'rxjs/Observable';

@Injectable()
export class FavoritosService {

 public url: string;

 constructor(private _http: Http) {
   this.url = Settings.GET_FAVORITOS;
 }

 getFavoritos() {
   return this._http.get(this.url)
      .map( res => res.json()) ;
 }
}

这是我的组成部分:

favoritos-list.component.ts

import { Favorito } from './../models/favorito';
import { FavoritosService } from './../service/favoritos.service'; 
import { Component, OnInit} from '@angular/core'; 

@Component({
   providers : [FavoritosService], 
   selector: 'app-favoritos-list',
   templateUrl: './favoritos-list.html',
   styleUrls: ['./favoritos.css']
})

export class FavoritosListComponent implements OnInit {
   public title: string;
   public errorMessage;


   constructor(       
      private _favoritoService = FavoritosService;        
   ) {
      this.title = 'Listado de marcadores:';
   }

   ngOnInit() {
      console.log('Favoritos list cargando...');
      this._favoritoService.getFavoritos().subscribe(
         //Compiler doesn't recognize getFavoritos()            
         result => {
            console.log(result);
         },
         error => {
            this.errorMessage = <any>error;
            if (this.errorMessage != null) {
                console.log(this.errorMessage);
                alert('Error en la petición');
            }
         }
     );
  }
 }

提前致谢

angular2-services angular2-components angular2-injection
1个回答
0
投票

我在这个链接中找到了解决方案:

https://www.reddit.com/r/Angular2/comments/6ovswj/property_get_does_not_exist_on_type_typeof/

在我放置的组件构造函数上:

private _favoritoService = FavoritosService;    

代替:

private _favoritoService : FavoritosService;    

我使用像TSLint这样的Angular 2插件编写Visual Studio代码。我很惊讶这个IDE在这一行中没有显示任何错误

© www.soinside.com 2019 - 2024. All rights reserved.