angular – 使用另一个自定义服务的服务时没有提供…错误

所以,我们谈论的是angular2,我知道它仍处于alpha状态.
我创建了一个我将在另一个服务中使用的基本服务.然后将后者用于组件中.

基本服务看起来像这样

import {Injectable,ObservablE} from 'angular2/core';
import {http} from 'angular2/http';
import {requestOptionsArgs,Connection,ConnectionBACkenD} from 'angular2/http';
import {BaserequestOptions,requestOptions} from 'angular2/http';
import {requestMethods} from 'angular2/http';
import {ResponsE} from 'angular2/http';
import {request} from 'angular2/http';
import {makeTypeError} from 'angular2/src/facade/exceptions';

@Injectable()

export class MyOAuth extends http {
  constructor(BACkend: ConnectionBACkend,defaultOptions: requestOptions) {
    super(BACkend,defaultOptions);
  }

  /**
   * Performs any type of http request. First argument is required,and can either be a url or
   * a {@link request} instance. If the first argument is a url,an optional {@link requestOptions}
   * object can be provided as the 2nd argument. The options object will be merged with the values
   * of {@link BaserequestOptions} before performing the request.
   */
  request(url: String | request,options?: requestOptionsArgs): Observable<Response> {
    var responSEObservable: any;
    if (isString(url)) {
      responSEObservable = httprequest(
          this._BACkend,new request(mergeOptions(this._defaultOptions,options,requestMethods.Get,url)));
    } else if (url instanceof request) {
      responSEObservable = httprequest(this._BACkend,url);
    } else {
      throw makeTypeError('First argument must be a url String or request instance.');
    }
    return responSEObservable;
  }
}

使用上述服务的其他服务看起来像这样(authenticate.js)：

import {Injectable,Inject} from 'angular2/angular2';
import {MyOAuth} from './MyOAuth';


@Injectable()

export class Authenticationservice {

  constructor(@Inject(MyOAuth) http) {
    this.http = http;
  }

  authenticate(username,password,community) {
    console.log('authenticate');
  }
}

然后在课堂上使用这个服务我称之为：

import {PagE} from 'ionic/ionic';
import './login.scss';
import {AuthenticationservicE} from '../../services/authentication';

@Page({
  templateUrl: 'app/login/login.html',providers: [Authenticationservice] //As of alpha 42
})

我在浏览器中得到的错误是

EXCEPTION: No provider for MyOAuth! (LoginPage -> Authenticationservice -> MyOAuth)

对我来说,我必须导入MyOAuth …

import {PagE} from 'ionic/ionic';
import './login.scss';
import {AuthenticationservicE} from '../../services/authentication';

@Page({
    templateUrl: 'app/login/login.html',providers: [[Authenticationservice],[MyOAuth]]
})

@Component({
    templateUrl: 'build/app.html',[MyOAuth]]
})
class MyApp{
}