调用接收凭据并检索用户的Rest服务。正在执行 HTTP方法不错,但用户对象不被更新,并且我不能其绑定到视图:Angular2绑定无法使用Observable
用户服务(连接到休息服务):
@Injectable()
export class UserService
{
constructor(private http:Http) {
}
public loginService(credential:Credentials):Observable<User>
{
let headers = new Headers({ 'Content-Type': 'application/json' });
let options = new RequestOptions({ headers: headers });
return this.http.post
("http://localhost:8090/Users/"+credential.username, JSON.stringify(credential),options)
.map((res) => res.json().user)
.catch((error:any) => Observable.throw(error.json().error || 'Server error'));
};
}
查看TS(持有用户对象,凭证和调用服务):
export class LoginComponent {
credentials = new Credentials();
private user: User;
private anyErrors: boolean;
private finished: boolean;
constructor(private userService: UserService) { }
login(){
this.userService.loginService(this.credentials).subscribe(
function(response) {this.user = response ; console.log("Response from
service 1" + JSON.stringify(response))},
function(error) { console.log("Error happened" + error)},
function() { console.log("the subscription is completed")}
);
console.log("Response from service 2" + JSON.stringify(this.user));
}
HTML模板:
Username: <input type="text" [(ngModel)]="credentials.username" name="login"> <br>
Password: <input type="text" [(ngModel)]="credentials.password" name="password" > <br>
{{user.username}} // <--- THIS NOT BEING UPDATED WHEN CLICK login
<button (click)="login()">login</button>
---------------------------------------------
User Model:
export class User
{
name:string;
lastname:string;
address2:string;
email:string;
phone:string;
username:string;
password:string;
constructor()
{
}
}
凭证型号
export class Credentials
{
username:string;
password:string;
constructor()
{
}
}
控制台
角是在开发模式下运行。调用enableProdMode()以启用生产模式。 login.component.ts:33服务2的响应{} login.component.ts:29服务1的响应{“name”:“edgargdl”,“lastname”:“flores”,“password”:“password” ,“email”:“[email protected]”,“phone”:“2107847131”,“contactPreference”:null,“username”:“edgargdl”,“links”:[]} login.component.ts:31订阅已完成
可以尝试登录的反应如何? –
你正在使用一个函数,而不是一个箭头函数,并没有正确地绑定它,所以'this'不是你认为的那样。 – jonrsharpe
是的,这是我的问题,谢谢 –