Embeer.js ArrayProxy 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 EmberObject from '@ember/object';
export default class WebsitesRoute extends Route {
    food = [
        EmberObject.create({
            food: 'apple',
            isFruit: true,
            buck: '1',
        }),
        EmberObject.create({
            food: 'Potato',
            isFruit: false,
            buck: '2',
        }),
        EmberObject.create({
            food: 'Banana',
            isFruit: true,
            buck: '1',
        }),
        EmberObject.create({
            food: 'Burgur',
            isFruit: false,
            buck: '2',
        }),
        EmberObject.create({
            food: 'Orange',
            isFruit: true,
            buck: '1',
        }),
    ];
    food2 = [
        EmberObject.create({
            food: 'sandwitch',
            isFruit: false, buck: '2',
        }),
        EmberObject.create({
            food: 'bean',
            isFruit: false, buck: '2',
        }),
        EmberObject.create({
            name: 'Banana',
            isFruit: true, buck: 1
        }),
        EmberObject.create({
            name: 'Water-melon',
            isFruit: true, buck: 2
        }),
        EmberObject.create({
            name: 'Papaya',
            isFruit: true, buck: 1
        }),
    ];
    temp;
    model() {
        return this.food;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('food', this.food);
        controller.set('temp', this.temp);
        controller.set('food2', this.food2);
    }
}

应用程序/控制器/getProperties1.js

Javascript


import Ember from 'ember';
export default Ember.Controller.extend({
    value: 0,
    actions: {
        List() {
            let ans = '';
            this.food.forEach((item) =>
                ans += item.getProperties('food').food +
                ' is in Bucket ' + item.getProperties('buck')
                    .buck + '\n');
            alert(ans);
        },
        Bucket2() {
            this.food.forEach((item, i) =>
                item.getProperties(this.food2.at(i)));
        },
        toggle2() {
            this.food.forEach((item, i) =>
                item.toggleProperty('isFruit'));
        },
    },
});

应用程序/模板/getProperties1.hbs

Javascript


{{page-title "getProperties"}}
<h3>List of Item in Buckets</h3>
<table>
    <tr>
        <th> Food Name </th>
        <th>Bucket </th>
        <th>Fruit </th>
    </tr>
    {{#each @model as |website|}}
        <tr>
            <td>{{website.food}}</td>
            <td>{{website.buck}}</td>
            <td>{{website.isFruit}}</td>
        </tr>
    {{/each}}
</table>
<br /><br />
<input
    type="button"
    id="increase"
    value="List All items with Bucket number"
    {{action "List"}}
/>
<br /><br />
<input
    type="button"
    id="update-list"
    value="List another Bucket item"
    {{action "Bucket2"}}
/>
<br /><br />
<input
    type="button"
    id="toggle-property"
    value="Toggle Fruit Property"
    {{action "toggle2"}}
/>
{{outlet}}

输出：访问 localhost:4200/getProperties1 查看输出

Ember.js ArrayProxy getProperties() 方法

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';
import { } from '@ember/array';
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'
            })
    ];
    fruits2 = [
        EmberObject.create(
            {
                name: 'Potato',
                isFruit: false, color: 'brown'
            }),
        EmberObject.create(
            {
                name: 'Tomato',
                isFruit: false, color: 'red'
            }),
        EmberObject.create(
            {
                name: 'Banana',
                isFruit: true, color: 'Yellow'
            }),
        EmberObject.create(
            {
                name: 'Water-melon',
                isFruit: true, color: 'green'
            }),
        EmberObject.create(
            {
                name: 'Papaya',
                isFruit: true, color: 'yellow'
            }),
    ];
    model() {
        return this.fruits;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('fruits', this.fruits);
        controller.set('fruits2', this.fruits2);
    }
}

应用程序/控制器/getProperties2.js

Javascript


import Ember from "ember";
import { isAny, isEvery } from "@ember/array";
export default Ember.Controller.extend({
    actions: {
        print() {
            let ans = '';
            this.fruits.forEach((item) =>
                ans += item.getProperties('name').name 
                + '\n');
            alert(ans);
        },
        Change() {
            let ans = this.fruits.forEach((item, i) =>
                item.getProperties(this.fruits2.at(i)));
        },
        toggle() {
            this.fruits.forEach((item) =>
                item.toggleProperty('isFruit'));
        },
    },
});

应用程序/模板/getProperties2.hbs

Javascript


{{page-title "getProperties"}}
<h3>Here is a list of eatables: </h3>
<br /><table>
    <tr>
        <th>Name</th>
        <th>isFruit</th>
        <th>color</th>
    </tr>
    {{#each @model as |detail|}}
        <tr>
            <td>{{detail.name}}</td>
            <td>{{detail.isFruit}}</td>
            <td>{{detail.color}}</td>
        </tr>
    {{/each}}
</table>
<br />
<input type="button" id="list-item"
       value="List all Items"
       {{action "print"}} />
<br /><br />
<input
    type="button"
    id="change-item"
    value="Change all Item in Bucket"
    {{action "Change"}}
/>
<br /><br />
<input
    type="button"
    id="toggle-isFruits"
    value="Toggle isFruit Properties"
    {{action "toggle"}}
/>
{{outlet}}

输出：访问 localhost:4200/getProperties2 查看输出

Ember.js ArrayProxy getProperties() 方法

参考： https://api.emberjs.com/ember/4.4/classes/ArrayProxy/methods/getProperties?anchor=getProperties

相关用法

注：本文由纯净天空筛选整理自jeemains0neet大神的英文原创作品 Ember.js ArrayProxy 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。