Ember.js DataAdapter get() 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 get() method is used to obtain a property’s value from the object. This method is the same as the object.keyName.  

Syntax:

get(keyName);

Parameters:

• keyName: It is the property name to retrieve.

Returns: The value or undefined if the key doesn’t exist.

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 get1

app/components/arr.js

Javascript

import Component from '@glimmer/component';
import Ember from 'ember';
import EmberObject from '@ember/object';
import {
    action,
    without,
    set,
    get
} from '@ember/object';

const Fruit = EmberObject.extend({
    init() {
        alert(`${this.get('name')} is in list Now`);
    }
});
export default Ember.Component.extend({

    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'
        }
    ],


    @action
    insertItem(data, data1, data2) {
        let temp = Fruit.create({
            name: data,
            isFruit: data1,
            color: data2
        });
        this.fruits.addObject(temp);
    },
    @action
    removeItem(data) {
        let temp = this.fruits.find((item) => item.color == data)
        this.fruits.set('[]', this.fruits.without(temp));
    },


})

app/components/arr.hbs

HTML

<h3>{{yield}}</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 Fruit"
           {{action "insertItem" this.item1 this.item2 this.item3}} />
</div>
<br />
<div>
    <label>Enter Fruit color: </label>
    {{input value=this.item4}}
</div><br />
<div>
    <input type="button" id="remove-item"
           value="Remove Fruit"
           {{action "removeItem" this.item4}} />
</div>
{{outlet}}

app/templates/get1.hbs

HTML

<Arr>
    List of Fruits:
</Arr>

Output:

get output1

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

ember generate route get2

app/components/arr2.js

Javascript

import Component from '@glimmer/component';
import {
    tracked
} from '@glimmer/tracking';
import {
    action
} from '@ember/object';
import Ember from 'ember';

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

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

    Changed: Ember.observer('fullName', function() {
        console.log(`fullName changed to: ${this.fullName}`);
    }),
});

export default Ember.Component.extend({
    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',
        }
    ],
    @tracked
    item3: 'Gulshan',
    @tracked
    item2: 'Angular',
    @tracked
    item1: 'stu6',
    @tracked
    item4: 'Sam',

    @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/components/arr2.hbs

HTML

<h3>{{yield}}</h3>
<table>
    <tr>
        <th>Name</th>
        <th>skill</th>
        <th>Id</th>
    </tr>
    {{#each this.students as |detail|}}
    <tr>
        <td>{{detail.Name}}</td>
        <td>{{detail.skill}}</td>
        <td>{{get detail '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' }} />

app/templates/get2.hbs

HTML

<Arr2>
    List of Students:
</Arr2>

Output:

get output2

Reference: https://api.emberjs.com/ember/4.6/classes/DataAdapter/methods/get?anchor=get