Ember.js Controller getProperties() Method

Ember.js is an open-source JavaScript framework used for developing large client-side web applications which are based on Model-View-Controller (MVC) architecture. Ember.js is one of the most widely used front-end application frameworks. It is made to speed up development and increase productivity. Currently, it is utilized by a large number of websites, including Square, Discourse, Groupon, Linked In, Live Nation, Twitch, and Chipotle.

The getProperties() method is used to get the value of multiple properties at once. We can retrieve a list of properties or single properties using this method.

Syntax:

getProperties( list );

Parameters:

• list: It is a list of keys to get.

Return Value: Object with the passed keys and its value.

Steps to Install and Run Ember.js:

Step 1: To run the following examples you will need to have an ember project with you. To create one, you will need to install ember-cli first. Write the below code in the terminal:

npm install ember-cli

Step 2: Now you can create the project by typing in the following piece of code:

ember new <project-name> --lang en

To start the server, type:

ember serve

Example 1: Type the following code to generate the route for this example:

ember generate route getProperties1

app/routes/getProperties1.js

Javascript

import Route from '@ember/routing/route';

export default class FruitsRoute extends Route {
    fruits = [
        {
            'name': 'Lady Finger',
            'isFruit': false,
            'color': 'green'
        },
        {
            'name': 'Brinjal',
            'isFruit': false,
            'color': 'purple'
        },
        {
            'name': 'Apple',
            'isFruit': true,
            'color': 'red'
        },
        {
            'name': 'Grapes',
            'isFruit': true,
            'color': 'green'
        },
        {
            'name': 'Mango',
            'isFruit': true,
            'color': 'yellow'
        },
        {
            'name': 'Watermelon',
            'isFruit': true,
            'color': 'red'
        },
        {
            '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);
    }
}

app/controllers/getProperties1.js

Javascript

import Ember from "ember";
import { addObject, isAny, isEvery } from "@ember/array";
import EmberObject from '@ember/object';

const Fruit = EmberObject.extend({
    init() {
        alert(`${this.getProperties('name').name}
        is Added in list`);
    }
});
export default Ember.Controller.extend({
    actions: {
        list() {
            let list = '';
            this.fruits.map((item) => list +=
            item.name + ` is ${item.color}` + '\n');
            alert(list)
        },
        insertItem(data, data1, data2) {
            let temp = Fruit.create({
                name: data,
                isFruit: data1,
                color: data2
            });
            this.fruits.addObject(temp);
        }
    },
});

app/templates/getProperties1.hbs

HTML

<h3>List of Fruits:</h3>
<table>
    <tr>
        <th>Name</th>
        <th>Fruit</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 /><br />
<div>
    <label>Enter Fruit Name: </label>
    {{input value=this.item1}}
</div><br />
<div>
    <label>Item is Fruit: </label>
    {{input value=this.item2}}
</div><br />
<div>
    <label>Enter Fruit color: </label>
    {{input value=this.item3}}
</div><br />
<div>
    <input
        type="button"
        id="insert-item"
        value="Insert Furit"
        {{action "insertItem" this.item1 this.item2 this.item3}}
    />
</div>
<br />
<div>
    <input
        type="button"
        id="list-item"
        value="Print Items"
        {{action "list"}}
    />
</div>
{{outlet}}

Output:

Ember.js Controller getProperties() Method

Example 2: Type the following code to generate the route for this example:

ember generate route getProperties2

app/routes/getProperties2.js

Javascript

import Route from '@ember/routing/route';
import Ember from 'ember';

let Student = Ember.Object.extend({
    // these will be supplied by `create`
    firstName: null,
    lastName: null,

    init() {
        alert(`${this.get('firstName')} is Listed`);
    },
    fullName: Ember.computed('firstName', 'lastName',
        function () {
            return `${this.firstName} ${this.lastName}`;
        }),

});
export default class PartyRoute extends Route {
    students = [{
        Name: 'Balit',
        skill: 'Python',
        Id: 'stu2',
    },
    {
        Name: 'Permu',
        skill: 'PHP',
        Id: 'stu0',
    },
    {
        Name: 'Sam',
        skill: 'R',
        Id: 'stu1',
    },
    {
        Name: 'Pokhu',
        skill: 'JavaScript',
        Id: 'stu3',
    },
    {
        Name: 'Tanu',
        skill: 'Java',
        Id: 'stu4',
    },
    {
        Name: 'Arabh',
        skill: 'c++',
        Id: 'stu5',
    }];

    item3 = 'Gulshan';
    item2 = 'Verma';
    item1 = 'stu6';
    model() {
        return this.students;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('students', this.students);
        controller.set('temp', this.temp);
        controller.set('item1', this.item1);
        controller.set('item2', this.item2);
        controller.set('item3', this.item3);
    }
}

app/controllers/getProperties2.js

Javascript

import Controller from '@ember/controller';
import { action, find } from '@ember/object';
import Ember from 'ember';

let Student = Ember.Object.extend({
    // these will be supplied by `create`
    Name: null,
    skill: null,
    id: null,

    init() {
        alert(`${this.getProperties('Name').Name} is Listed`);
    },
    fullName: Ember.computed('firstName', 'lastName',
        function () {
            return `${this.firstName} ${this.lastName}`;
        }),

    Changed: Ember.observer('fullName',
        function () {
            console.log(`fullName changed to: ${this.fullName}`);
        }),
});
export default class Array2Controller extends Controller {

    @action
    print(data1, data2, data3) {
        let temp = Student.create({
            Name: data1,
            skill: data2,
            Id: data3
        });
        this.students.addObject(temp);
    }
    @action
    show() {
        let temp = '';
        this.students.map((item) =>
            temp += item.Name + '\n');
        alert(temp);
    }
}

app/templates/getProperties2.hbs

HTML

<table>
    <tr>
        <th>Name</th>
        <th>skill</th>
        <th>Id</th>
    </tr>
      {{#each @model as |details|}}
    <tr>
            <td>{{details.Name}}</td>
            <td>{{details.skill}}</td>
            <td>{{details.Id}}</td>
    </tr>
    {{/each}}
</table>
<br/>
<div>
    <label>Enter Student FirstName: </label>
    {{input value=this.item3}}
</div>
<br/>
<div>
    <label>Enter Student LastName: </label>
    {{input value=this.item2}}
</div>
<br/>
<div>
    <label>Enter Student Id: </label>
    {{input value=this.item1}}
</div>
<br/>
<input type="button"
    id="set-code"
    value="Update Student details"
    {{action 'print' this.item3 this.item2 this.item1}}/>
<br/>
<br/>
<br/>
<input type="button"
    id="list-student"
    value="List All Student"
    {{action 'show'}}/>

Output:

Ember.js Controller getProperties() Method

Reference: https://api.emberjs.com/ember/4.6/classes/Controller/methods/getProperties?anchor=getProperties