調用接收憑據並檢索用戶的Rest服務。正在執行 HTTP方法不錯,但用戶對象不被更新,並且我不能其綁定到視圖:Angular2綁定無法使用Observable
用戶服務(連接到休息服務):
@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(持有用戶對象,憑證和調用服務):
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()
{
}
}
憑證型號
export class Credentials
{
username:string;
password:string;
constructor()
{
}
}
控制檯
角是在開發模式下運行。調用enableProdMode()以啓用生產模式。 login.component.ts:33服務2的響應{} login.component.ts:29服務1的響應{「name」:「edgargdl」,「lastname」:「flores」,「password」:「password」 ,「email」:「[email protected]」,「phone」:「2107847131」,「contactPreference」:null,「username」:「edgargdl」,「links」:[]} login.component.ts:31訂閱已完成
可以嘗試登錄的反應如何? –
你正在使用一個函數,而不是一個箭頭函數,並沒有正確地綁定它,所以'this'不是你認爲的那樣。 – jonrsharpe
是的,這是我的問題,謝謝 –