带有子分页的 Polymer- App 路由

Question

已阅读：https://www.polymer-project.org/2.0/toolbox/case-study#routing 并且：https://github.com/PolymerElements/app-route

我想我只是对如何使用子路由组件感到困惑，但我阅读的文档和示例并没有真正让我得到任何帮助。

如果有人能为我指出房间里的大象，那就太好了。

我想达到什么目的？我有一个项目列表（称为事项），我在 my-matters.html 上显示（此页面当前调用另一个名为 matters-list.html 的自定义元素，它通过列表） http://127.0.0.1:8081/matters

我希望能够单击其中一个并转到详细信息页面（我已经构建了这个名为 matters-details.html 的模板例如：http://127.0.0.1:8081/matters/123

问题：

如何处理 my-matters.html 上的路由我的理解是，如果我添加一个按钮来点击 href /matters/123，my-matter.html 页面上应该有一些应用程序路由逻辑知道关闭事项列表并打开事项详细信息？

还是我做错了，需要添加两页我的事-list.html 我的事-details.html 并在 my-app 路由中使用 url /matters ?

下的两者

这里是我的代码，主要是从初学者工具包中提取的：my-app.html

    <link rel="import" href="../bower_components/polymer/polymer-element.html">
<link rel="import" href="../bower_components/app-layout/app-drawer/app-drawer.html">
<link rel="import" href="../bower_components/app-layout/app-drawer-layout/app-drawer-layout.html">
<link rel="import" href="../bower_components/app-layout/app-header/app-header.html">
<link rel="import" href="../bower_components/app-layout/app-header-layout/app-header-layout.html">
<link rel="import" href="../bower_components/app-layout/app-scroll-effects/app-scroll-effects.html">
<link rel="import" href="../bower_components/app-layout/app-toolbar/app-toolbar.html">
<link rel="import" href="../bower_components/app-route/app-location.html">
<link rel="import" href="../bower_components/app-route/app-route.html">
<link rel="import" href="../bower_components/iron-pages/iron-pages.html">
<link rel="import" href="../bower_components/iron-selector/iron-selector.html">
<link rel="import" href="../bower_components/paper-icon-button/paper-icon-button.html">
<link rel="import" href="my-icons.html">

<link rel="lazy-import" href="my-home.html">
<link rel="lazy-import" href="my-matters.html">
<link rel="lazy-import" href="my-view2.html">
<link rel="lazy-import" href="my-view3.html">
<link rel="lazy-import" href="my-view404.html">

<dom-module id="my-app">
  <template>
    <style>
      :host {
        --app-primary-color: #4285f4;
        --app-secondary-color: black;

        display: block;
      }

      app-drawer-layout:not([narrow]) [drawer-toggle] {
        display: none;
      }

      app-header {
        color: #fff;
        background-color: var(--app-primary-color);
      }

      app-header paper-icon-button {
        --paper-icon-button-ink-color: white;
      }

      .drawer-list {
        margin: 0 20px;
      }

      .drawer-list a {
        display: block;
        padding: 0 16px;
        text-decoration: none;
        color: var(--app-secondary-color);
        line-height: 40px;
      }

      .drawer-list a.iron-selected {
        color: black;
        font-weight: bold;
      }
    </style>

    <app-location
        route="{{route}}"
        url-space-regex="^[[rootPath]]">
    </app-location>

    <app-route
        route="{{route}}"
        pattern="[[rootPath]]:page"
        data="{{routeData}}"
        tail="{{subroute}}">
    </app-route>

    <app-route
    route="{{subroute}}"
    pattern="/:id"
    data="{{subrouteData}}">
</app-route>

    <app-drawer-layout fullbleed force-narrow narrow="{{narrow}}">
      <!-- Drawer content -->
      <app-drawer id="drawer" slot="drawer" swipe-open="[[narrow]]">
        <app-toolbar>Menu</app-toolbar>
        <iron-selector selected="[[page]]" attr-for-selected="name" class="drawer-list" role="navigation">
          <a name="home" href="[[rootPath]]home">Welcome</a>
          <a name="matters" href="[[rootPath]]matters">Matters</a>
          <a name="view2" href="[[rootPath]]view2">View Two</a>
          <a name="view3" href="[[rootPath]]view3">View Three</a>
        </iron-selector>
      </app-drawer>

      <!-- Main content -->
      <app-header-layout has-scrolling-region>

        <app-header slot="header" condenses reveals effects="waterfall">
          <app-toolbar>
            <paper-icon-button icon="my-icons:menu" drawer-toggle></paper-icon-button>
            <div main-title>LegalSuite Software</div>
          </app-toolbar>
        </app-header>

        <iron-pages
            selected="[[page]]"
            attr-for-selected="name"
            fallback-selection="view404"
            role="main">
          <my-home name="home"></my-home>
          <my-matters name="matters"></my-matters>
          <my-view2 name="view2"></my-view2>
          <my-view3 name="view3"></my-view3>
          <my-view404 name="view404"></my-view404>
        </iron-pages>
      </app-header-layout>
    </app-drawer-layout>
  </template>

  <script>
    // Gesture events like tap and track generated from touch will not be
    // preventable, allowing for better scrolling performance.
    Polymer.setPassiveTouchGestures(true);

    class MyApp extends Polymer.Element {
      static get is() { return 'my-app'; }

      static get properties() {
        return {
          page: {
            type: String,
            reflectToAttribute: true,
            observer: '_pageChanged',
          },
          routeData: Object,
          subroute: Object,
          // This shouldn't be neccessary, but the Analyzer isn't picking up
          // Polymer.Element#rootPath
          rootPath: String,
        };
      }

      static get observers() {
        return [
          '_routePageChanged(routeData.page)',
        ];
      }

      _routePageChanged(page) {
        // If no page was found in the route data, page will be an empty string.
        // Default to 'home/Welcome' in that case.
        this.page = page || 'home';

        // Close a non-persistent drawer when the page & route are changed.
        if (!this.$.drawer.persistent) {
          this.$.drawer.close();
        }
      }

      _pageChanged(page) {
        // Load page import on demand. Show 404 page if fails
        const resolvedPageUrl = this.resolveUrl('my-' + page + '.html');
        Polymer.importHref(
            resolvedPageUrl,
            null,
            this._showPage404.bind(this),
            true);
      }

      _showPage404() {
        this.page = 'view404';
      }
    }

    window.customElements.define(MyApp.is, MyApp);
  </script>
</dom-module>

我的-matters.html : `

<link rel="import" href="../bower_components/polymer/polymer-element.html">
<link rel="import" href="shared-styles.html">
<link rel="import" href="Matters/matter-list.html">
<link rel="import" href="Matters/matter-detail.html">
<dom-module id="my-matters">
<div>
  <template>
    <style include="shared-styles">
      :host {
        display: block;

        padding: 10px;
      }
    </style>

    <div class="card">
      <div class="circle">M</div>
      <h1>Matters</h1>
      <matter-list></matter-list>
      //example
      <matter-detail linkedmatterid="123"></matter-detail>
  </template>
</div>
  <script>
    class Matters extends Polymer.Element {
      static get is() { return 'my-matters'; }
         }

    window.customElements.define(Matters.is, Matters);
  </script>

</dom-module>

Answer 1

如果你必须URL喜欢/matters/123

1) 从 my-app.html 中删除第二个 app-route 元素并将其添加到 my-matters.html

<app-route
    route="{{subroute}}"
    pattern="/:id"
    data="{{subrouteData}}">
</app-route>

2) 更改 my-app.html 元素中的 iron-pages 以包含路线：

<my-matters name="matters" route="[[subroute]]"></my-matters>

3) 添加id作为my-matters.html

的属性

  static get properties() { return {
    id: {
      type: Number,
      value: ''
    },
    route: {
      type: Object
    },
    subrouteData: {
      type: Object
    }
  }

4) 更新 my-matters.html 中的模板以显示详细信息并隐藏列表，即

<template is="dom-if" if="[[!_idIsDefined(subrouteData.id)]]">
      <matter-list></matter-list>
</template>
<template is="dom-if" if="[[_idIsDefined(subrouteData.id)]]">
      <matter-detail linkedmatterid="[[subrouteData.id]]"></matter-detail>
</template>

5) 创建对模板进行操作的逻辑：

_idIsDefined(id){
  //There are probably ways to optimize this
  if(id){
     return true;
  }
  return false;
}

编辑：我建议使用 Polymer Shop App 来学习 Polymer，它的代码在路由、观察者、数据绑定方面非常丰富，可以作为一个很好的起点。

编辑2：更新了步骤 3 和 4 以使用 subrouteData 中的 id。

带有子分页的 Polymer- App 路由

Polymer- App Route with Sub Paging

polymer

polymer-2.x

app-route