如何在angular2中手动抛出可观察的错误？ [英] How to throw observable error manually in angular2?

问题描述

我正在开发angular2 app，我正在通过HTTp进行休息，如下所示：

I am working on angular2 app in which I am making a rest call through HTTp as below:

login(email, password) {
    let headers = new Headers();
    headers.append('Content-Type', 'application/x-www-form-urlencoded');
    let options = new RequestOptions({ headers: headers });
    let body = `identity=${email}&password=${password}`;
    return this.http.post(`${this._configService.getBaseUrl()}/login`, body, options)
    .map((res: any) => {
        let response: any = JSON.parse(res._body);
        if (response.success == 0) {
          Observable.throw(response);  // not working
        } else if (response.success == 1) {
          console.log('success');
          localStorage.setItem('auth_token', 'authenticated');
          this.loggedIn = true;
          return response;
        }
    });
}

基本上我希望我的组件获得响应&订阅中的错误。

basically I want my component to get response & error in my subscribe call.

ie

this._authenticateService.login(this.loginObj['identity'],this.loginObj['password']).subscribe(
  (success)=>{      
    this.credentialsError=null;  
    this.loginObj={};  
    this._router.navigate(['dashboard']);    
  },
  (error)=>{
    console.log(error);        
    this.credentialsError=error;     
  }
);

但是我的api总是返回成功，因为它以这样的方式定义。

but my api always returns success as it id defined that way.

所以我想知道如果 response.success == 0 我怎么能抛出错误消息，以便在我的错误参数内访问它订阅回调。

So I want to know how can I throw error msg if response.success == 0 , so that it will be accessed inside error argument of my subscribe callback.

推荐答案

if (response.success == 0) {
   throw Observable.throw(response);  
 } 

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