Embeer.js Route getProperties()用法及代码示例

Ember.js 是一个开源 JavaScript 框架，用于开发基于 Model-View-Controller (MVC) 架构的大型客户端 Web 应用程序。 Ember.js是使用最广泛的前端应用框架之一。它的目的是加速开发并提高生产力。目前，它被大量网站使用，包括 Square、Discourse、Groupon、Linked In、Live Nation、Twitch 和 Chipotle。

getProperties() 方法用于一次获取多个属性的值。

用法:

getProperties( list );

参数：

list: 它是要获取的键数组。

返回值：该方法返回一个对象。

安装和运行 Ember.js 的步骤：

第 1 步：要运行以下示例，您需要有一个 ember 项目。要创建一个，您需要先安装ember-cli。在终端中写入以下代码：

npm install ember-cli

第 2 步：现在您可以通过输入以下代码来创建项目：

ember new <project-name> --lang en

要启动服务器，请键入：

ember serve

示例 1：键入以下代码以生成本示例的路由：

ember generate route getProperties1

应用程序/路线/getProperties1.js

Javascript


import Route from '@ember/routing/route';
import Ember from 'ember';
import EmberObject from '@ember/object';
import EmberResolver from 'ember-resolver';
export default class PartyRoute extends Route {
    students = [
        EmberObject.create({
            Name: 'Balit',
            skill: 'Python',
            Id: 'stu2',
            gender: true,
        }),
        EmberObject.create({
            Name: 'Yashu',
            skill: 'PHP',
            Id: 'stu0',
            gender: false,
        }),
        EmberObject.create({
            Name: 'Sam',
            skill: 'R',
            Id: 'stu1',
            gender: true,
        }),
        EmberObject.create({
            Name: 'Pokhu',
            skill: 'JavaScript',
            Id: 'stu3',
            gender: true,
        }),
        EmberObject.create({
            Name: 'Tanu',
            skill: 'Java',
            Id: 'stu4',
            gender: false,
        }),
        EmberObject.create({
            Name: 'Arabh',
            skill: 'c++',
            Id: 'stu5',
            gender: true,
        }),
    ];
    model() {
        return this.students;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('students', this.students);
        controller.set('temp', this.temp);
    }
}

应用程序/控制器/getProperties1.js

Javascript


import Controller from '@ember/controller';
import { action, find } from '@ember/object';
import Ember from 'ember';
export default class Array2Controller extends Controller {
    @action
    print() {
        let temp2 = '';
        this.students.forEach(
            (item) => (temp2 +=
                item.getProperties('Name')['Name'] + '\n')
        );
        alert(temp2);
    }
    @action
    flip() {
        let temp2 = this.students.reverseObjects();
        this.students.forEach((item, idx) =>
            item.setProperties(temp2.at(idx)));
    }
}

应用程序/模板/getProperties1.hbs

HTML


{{page-title "getProperties"}}
<h3>
    List of Students:
</h3>
<table>
    <tr>
        <th>Name</th>
        <th>skill</th>
        <th>Id</th>
        <th>Gender</th>
    </tr>
    {{#each this.students as |detail|}}
        <tr>
            <td>{{detail.Name}}</td>
            <td>{{detail.skill}}</td>
            <td>{{get detail "Id"}}</td>
            <td>{{if detail.gender "Male" "Female"}}</td>
        </tr>
    {{/each}}
</table>
<br />
<input
    type="button"
    id="set-code"
    value="Print Student details"
    {{action "print"}}
/>
<br />
<br />
<br />
<input type="button" id="flip-student"
       value="Flip List" {{action "flip"}} />

输出：

获取属性输出1

示例 2：键入以下代码以生成本示例的路由：

ember generate route getProperties2

应用程序/路线/getProperties2.js

Javascript


import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
export default class FruitsRoute extends Route {
  fruits = [
    EmberObject.create({
      name: 'Lady Finger',
      isFruit: false,
      color: 'green',
    }),
    EmberObject.create({
      name: 'Brinjal',
      isFruit: false,
      color: 'purple',
    }),
    EmberObject.create({
      name: 'Apple',
      isFruit: true,
      color: 'red',
    }),
    EmberObject.create({
      name: 'Grapes',
      isFruit: true,
      color: 'green',
    }),
    EmberObject.create({
      name: 'Mango',
      isFruit: true,
      color: 'yellow',
    }),
    EmberObject.create({
      name: 'Watermelon',
      isFruit: true,
      color: 'red',
    }),
    EmberObject.create({
      name: 'Orange',
      isFruit: true,
      color: 'orange',
    }),
  ];
  item2;
  item3;
  model() {
    this.set('[]', this.fruits);
    return this;
  }
  setupController(controller, model) {
    super.setupController(controller, model);
    controller.set('fruits', this.fruits);
  }
}

应用程序/控制器/getProperties2.js

Javascript


import Ember from 'ember';
import { addObject, isAny, isEvery } from '@ember/array';
import EmberObject from '@ember/object';
export default Ember.Controller.extend({
    actions: {
        insertItem(data) {
            let temp2 = '';
            this.fruits.forEach(
                (item) => (temp2 +=
                    item.getProperties(data)[data] + '\n')
            );
            alert(temp2);
        },
        flip() {
            let data = this.fruits.reverseObjects();
            this.fruits.forEach((item, idx) =>
                item.setProperties(temp2.at(idx)));
        },
    },
});

应用程序/模板/getProperties2.hbs

HTML


{{page-title "getProperties"}}
<h3>Fruit's Lists :</h3>
<table>
    <tr>
        <th>name</th>
        <th>isFruit</th>
        <th>color</th>
    </tr>
    {{#each this.fruits as |detail|}}
        <tr>
            <td>{{detail.name}}</td>
            <td>{{detail.isFruit}}</td>
            <td>{{detail.color}}</td>
        </tr>
    {{/each}}
</table>
<br />
<div>
    <label>Enter Attribute: </label>
    {{input value=this.item3}}
</div><br />
<div>
    <input
        type="button"
        id="print-item"
        value="Print Attribute's value"
        {{action "insertItem" this.item3}}
    />
</div>
<br />
<div>
    <input
        type="button"
        id="flip-student"
        value="Flip List"
        {{action "flip"}}
    />
</div>
{{outlet}}

输出：

获取属性输出2

参考：https://api.emberjs.com/ember/4.6/classes/Route/methods/getProperties?anchor=getProperties

相关用法

注：本文由纯净天空筛选整理自ys973caiv大神的英文原创作品 Ember.js Route getProperties() Method。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。