首页 文章

错误TypeError：无法读取未定义的属性'map'

提问于
浏览 次
0

得到这个错误，真的不想在角度日历上显示事件：https://mattlewis92.github.io/angular-calendar/#/async-events

error_handler.ts：1 ERROR TypeError：无法在MapSubscriber.next（map.ts：75）的MapSubscriber.Subscriber.next（订阅者）中读取MapSubscriber.project（planning.component.ts：100）中未定义的属性“map” . ts：95）在MapSubscriber._next（map.ts：80）的MapSubscriber.Subscriber.next（Subscriber.ts：95），位于ZoneHlep.Reb . zone-mix.js：424）在Zone.webpackJsonp.85.Zone.runTask（区域）的ZoneDelegate.webpackJsonp.85.ZoneDelegate.invokeTask（zone-mix.js：423）的Object.onInvokeTask（ng_zone.ts：280）处-mix.js：191）

component.ts

import { Component, ChangeDetectionStrategy, OnInit } from '@angular/core';
import { Http, URLSearchParams } from '@angular/http';
import { HttpClient } from '@angular/common/http';
import { CustomDateFormatter } from './custom-date-formatter.provider';
import 'rxjs/add/operator/map';
import { Observable } from 'rxjs/Observable';

interface Event {
 id: number;
 title: string;
 start: string;
 end: string;
}

events$: Observable<Array<CalendarEvent<{ event: Event }>>>;

constructor(private http: Http) { }

ngOnInit(): void {
    this.fetchEvents();
}

fetchEvents(): void {

    this.events$ = this.http
        .get(this.apiUrl)
        .map((response) => response.json())
        .map(({ results }: { results: Event[] }) => {
            return results.map((event: Event) => {
                return {
                    title: event.title,
                    start: new Date(event.start),
                    end: new Date(event.end),
                    color: colors.yellow
                };
            });
        });

}

来自api的json数据

[
{
"id": 2,
"user_id": 1,
"planning_id": 1,
"start": "2017-09-03T22:00:00.000Z",
"end": "2017-09-06T12:33:46.271Z",
"title": "A 3 day event",
"created_at": "2017-09-05 16:39:47",
"updated_at": "2017-09-05 16:39:47"
},
{
"id": 3,
"user_id": 1,
"planning_id": 1,
"start": "2017-09-03T22:00:00.000Z",
"end": "2017-09-06T12:33:46.271Z",
"title": "A 3 day event",
"created_at": "2017-09-07 13:27:36",
"updated_at": "2017-09-07 13:27:36"
}
]
angular typescript

2 回答

  • 0

    您必须导入 Map 运算符：

    import 'rxjs/add/operator/map';

    回复于
  • 2

    我知道它已经过时但我找到了一种方法可以使它与Angular 5一起使用

    以这种方式声明事件：

    asyncEvents$: Observable<CalendarEvent[]>;

    然后使用HttpClient加载数据

    请注意，我的API返回了 DateEvent

    loadEvents() {
    this.asyncEvents$ = this.http.get<DateEvent[]>(YOUR_URL) 
      .map(res => { 
        return res.map(event => { 
          return {
              title: event.label,
              start: new Date(event.startDate),
              color: {primary: event.color, secondary: "#D1E8FF"},
              meta: {
                event
              },
              allDay: true
            };
        });
      });
  }

    然后一切都按预期工作

    回复于

相关问题