小编mah*_*ngh的帖子

我正在使用Angular 7并使用observable调用简单服务

import { Injectable } from '@angular/core';
import { Http, Headers} from '@angular/http';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class AuthService {
  constructor(private http:Http) { }
  registerUser(user):Observable<any>{
    let headers = new Headers();
    headers.append('Content-Type','application/json');
    return this.http.post('http://localhost:8888/users/register', user, {headers:headers});
  }
}

虽然编译代码是好的,但当它命中注册url和组件然后它给出错误

ERROR Error: "[object Object]"
    resolvePromise http://localhost:4200/polyfills.js:3159:31
    resolvePromise http://localhost:4200/polyfills.js:3116:17
    scheduleResolveOrReject http://localhost:4200/polyfills.js:3218:17
    invokeTask http://localhost:4200/polyfills.js:2766:17
    onInvokeTask http://localhost:4200/vendor.js:72221:24
    invokeTask http://localhost:4200/polyfills.js:2765:17
    runTask http://localhost:4200/polyfills.js:2533:28
    drainMicroTaskQueue http://localhost:4200/polyfills.js:2940:25
vendor.js:70671:5
defaultErrorLogger
http://localhost:4200/vendor.js:70671:5
./node_modules/@angular/core/fesm5/core.js/ErrorHandler.prototype.handleError
http://localhost:4200/vendor.js:70719:9
next
http://localhost:4200/vendor.js:72698:111
./node_modules/@angular/core/fesm5/core.js/EventEmitter.prototype.subscribe/schedulerFn<
http://localhost:4200/vendor.js:68245:36
./node_modules/rxjs/_esm5/internal/Subscriber.js/SafeSubscriber.prototype.__tryOrUnsub
http://localhost:4200/vendor.js:141501:13
./node_modules/rxjs/_esm5/internal/Subscriber.js/SafeSubscriber.prototype.next
http://localhost:4200/vendor.js:141439:17
./node_modules/rxjs/_esm5/internal/Subscriber.js/Subscriber.prototype._next …