为什么我在 angular2 中的 RouteParams 没有在 angular2 中刷新？

Question

当我点击“编辑”按钮时，我的 RouteParams 无法正常工作。

在第一个视图中，我单击 bob 行上的编辑按钮 这是第二个视图

现在我单击浏览器中的后退按钮，它会返回第一视图。然后我单击 pop 行 上的编辑 btn，这是第三个视图（与第二个视图相同，这是错误的）

然后我放了一些控制台来调试。这是控制台日志

这是我单击编辑按钮时第一个视图的代码，它触发 func 并在 console.log 图片中记录 1 和 3 记录

import {Component} from 'angular2/core';
import {CORE_DIRECTIVES} from 'angular2/common';
import { Router, RouteParams, ROUTER_DIRECTIVES } from 'angular2/router';
import {MailingListService} from'../../services/mailing-list/mailing-lists.service'
import {Subscriber} from '../../models/subscriber/subscriber';
import 'rxjs/Rx';
import {Observable} from 'rxjs/Rx';

@Component({
selector: 'subscriber-list-edit-view',
templateUrl: './app/components/subscriber-list-editor-view/subscriber-list-editor-view.html',
directives: [ROUTER_DIRECTIVES]
})

export class EditSubscriberListViewComponent {

subscribers: Subscriber[];
id: string;
constructor(private mailingListsService: MailingListService, params: RouteParams, private router: Router) {

    this.init(this.id = params.get("id"));
}


init(id: string) {
    this.mailingListsService.getSubscribers(this.id).subscribe(x => {
        this.subscribers = x;
    });
}
//this is fired when click the edit button
editSubscriber(subscriber: Subscriber) {

    this.router.navigate(['Subscribers.Edit', { id: this.id, subscriber: subscriber }]);
    console.log(subscriber);//this print the first and third record in console.log
}



deleteSubscriber(subscriber: Subscriber) {

    this.mailingListsService.deleteSubscriber(this.id, subscriber)
        .subscribe(() => { this.init(this.id) });

}


}

这是我单击编辑按钮并跳转到编辑视图后的第二个视图的代码，它触发构造函数并在 console.log 图片中记录 2 和 4 记录

import {Component} from 'angular2/core';
import { Router, RouteParams } from 'angular2/router';
import {CORE_DIRECTIVES} from 'angular2/common';  
import {Subscriber}from '../../models/subscriber/subscriber';
import {MailingListService} from'../../services/mailing-list/mailing-lists.service'

@Component({
selector: 'create-subscriber-view',
templateUrl: './app/components/subscriber-creator-view/subscriber-creator-view.html'
})

export class CreateSubscriberComponent {
subscriber: Subscriber;
id: string;
subscriberId: string;  
name: string;
phoneNumber: string;
email: string;
isActivated: boolean;
isBusy: boolean;
isEdit: boolean;
constructor(private mailingListService: MailingListService,private params: RouteParams, private router: Router) {
    this.id = params.get("id");
    this.subscriber = params.get("subscriber");

    console.log(params.get("subscriber")); //this doesn't work well,print the second and forth record in the console.log

    if (this.subscriber != null) { this.isEdit = true; this.name = this.subscriber.name; this.phoneNumber = this.subscriber.phoneNumber; this.email = this.subscriber.email; this.subscriberId = this.subscriber.id; this.isActivated = this.subscriber.isActivated;};          

}

create() {
    if (this.phoneNumber == null && this.email == null) { alert("either phone or email is required ! "); return; }
    this.isBusy = true;
    this.mailingListService.createSubscriber(this.id, {
        name: this.name,
        phoneNumber: this.phoneNumber,
        email: this.email
    })     
        .subscribe(() => { this.router.navigate(['MailingLists.View', { id: this.id }]) });  
}  

edit() {
    if (this.phoneNumber == null && this.email == null) { alert("either phone or email is required ! "); return; }
    this.isBusy = true;
    this.mailingListService.editSubscriber(this.id, {
        name: this.name,
        phoneNumber: this.phoneNumber,
        email: this.email
    })
        .subscribe(() => { this.router.navigate(['MailingLists.View', { id: this.id }]) });  
}

}

如您所见，console.log 中的第四条记录不正确，因此我认为这是参数问题。但我不知道为什么以及如何解决这个问题。

这是路由配置

 { path: '/MailingLists/:id/Subscribers/Create', component: CreateSubscriberComponent, as: 'Subscribers.Create' },
{ path: '/MailingLists/:id/Subscribers/Edit', component: CreateSubscriberComponent, as: 'Subscribers.Edit' },

创建和编辑使用相同的组件但不同的 url。

Answer 1

因为之前我将订阅者作为对象传递，而 routeparams 通过引用找到对象。这可能是它没有刷新数据的原因。

我在这里有一个可行的解决方案。只需做一个 JSON.stringify(subscriber) 而不是传递一个你传递一个字符串的对象。

editSubscriber(subscriber: Subscriber) {
    this.router.navigate(['Subscribers.Edit', { id: this.id, subscriberString: JSON.stringify(subscriber) }])//here

}

现在，在第二个组件中，您获取字符串并执行 JSON.parse()

 constructor(private mailingListService: MailingListService, private params: RouteParams, private router: Router) {
    this.id = params.get("id");
    this.subscriberString = params.get("subscriberString");            
    if (this.subscriberString != null) {
        this.isEdit = true;
        this.subscriber = JSON.parse(this.subscriberString);//Here
        this.name = this.subscriber.name;
        this.phoneNumber = this.subscriber.phoneNumber;
        this.email = this.subscriber.email;
        this.subscriberId = this.subscriber.id;
        this.isActivated = this.subscriber.isActivated;
    };          

}

永远记住你的路由参数只能是字符串数字布尔类型（原始类型？）