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Ember.js ObjectProxy get() Method

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Ember.js is an open-source JavaScript framework used for developing large client-side web applications which is 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 retrieve the value of the passed property from the object.

Syntax:

get( keyName );

Parameters:

  • keyName: It is the name of the property whose value we want.

Return Value: The Property value or undefined.

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/routes/get1.js

Javascript




import Route from '@ember/routing/route';
import EmberObject from '@ember/object';
import { } from '@ember/array';
 
export default class FruitsRoute extends Route {
    students = [
        EmberObject.create({ name: 'Rahul',
            Class: 11, marks: 75 }),
        EmberObject.create({ name: 'Sam',
            Class: 12, marks: 59 }),
        EmberObject.create({ name: 'David',
            Class: 11, marks: 67 }),
        EmberObject.create({ name: 'Druv',
            Class: 12, marks: 44 }),
        EmberObject.create({ name: 'Mahan',
            Class: 12, marks: 87 }),
        EmberObject.create({ name: 'Ram',
            Class: 11, marks: 71 }),
        EmberObject.create({ name: 'Dadu',
            Class: 12, marks: 58 })
    ];
    model() {
        return this.students;
    }
    setupController(controller, model) {
        super.setupController(controller, model);
        controller.set('students', this.students);
    }
}


app/controllers/get1.js

Javascript




import Ember from "ember";
import { isAny, isEvery } from "@ember/array";
 
export default Ember.Controller.extend({
    actions: {
        increase(data) {
            this.students.forEach((item) =>
                item.incrementProperty('marks',
                JSON.parse(data)));
        },
        decrease(data) {
            this.students.forEach((item) =>
                item.decrementProperty('marks',
                JSON.parse(data)));
        },
        remove(item) {
            this.students.set('[]', this.students.without
                (this.students.findBy('name', item)));
        },
        show_first() {
            let ans = this.students.get('firstObject');
            alert(ans.name)
        },
        show_last() {
            let ans = this.students.get('lastObject');
            alert(ans.name)
        },
    },
});


app/templates/get1.hbs

Javascript




{{page-title "get"}}
<h3>Students List: </h3>
<table>
    <tr>
        <th>Name</th>
        <th>Class</th>
            <th>Marks</th>
      </tr>
      {{#each @model as |detail|}}
        <tr>
            <td>{{detail.name}}</td>
              <td>{{detail.Class}}</td>
              <td>{{detail.marks}}</td>
        </tr>
      {{/each}}
</table>
<br />
<div>
    <label>Enter value: </label>
      {{input value=this.item}}
</div>
<input
    type="button"
      id="increase-marks"
      value="Increase All marks by Value"
      {{action "increase" this.item}}
/>
<br /><br />
<div>
    <label>Enter value: </label>
      {{input value=this.item2}}
</div>
<input
    type="button"
      id="decrease-marks"
      value="decrease All marks by Value"
      {{action "decrease" this.item2}}
/>
<br /><br />
<div>
    <label>Enter Name: </label>
      {{input value=this.item3}}
</div>
<input
    type="button"
      id="remove-student"
      value="Remove Student"
      {{action "remove" this.item3}}
/>
<br /><br />
<input
    type="button"
      id="first-student"
      value="Show First Student in list"
      {{action "show_first"}}
/>
<br /><br />
<input
    type="button"
      id="last-student"
      value="Show Last Student in list"
      {{action "show_last"}}
/>
{{outlet}}


Output: Visit localhost:4200/get1 to view the output.

Ember.js ObjectProxy get() Method

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

ember generate route get2

app/routes/get2.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,
            quant: 3,
        }),
        EmberObject.create({
            food: 'Potato',
            isFruit: false,
            quant: 4,
        }),
        EmberObject.create({
            food: 'Banana',
            isFruit: true,
            quant: 2,
        }),
        EmberObject.create({
            food: 'Burgur',
            isFruit: false,
            quant: 2,
        }),
        EmberObject.create({
            food: 'Orange',
            isFruit: true,
            quant: 7,
        }),
    ];
 
    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);
    }
}


app/controllers/get2.js

Javascript




import Ember from 'ember';
 
export default Ember.Controller.extend({
    value: 0,
    actions: {
        remove_item(item) {
            this.food.set('[]', this.food.without
            (this.food.findBy('food', item)));
        },
 
        list() {
            let ans = '';
            this.food.forEach((item) => ans +=
                item.get('food') + '\n');
            alert(ans)
        },
        increase() {
            this.food.forEach((item) =>
                item.incrementProperty('quant'));
        },
        decrease() {
            this.food.forEach((item) =>
                item.decrementProperty('quant'));
        },
    },
});


app/templates/get2.hbs

Javascript




{{page-title "get"}}
<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.quant}}</td>
              <td>{{website.isFruit}}</td>
        </tr>
      {{/each}}
</table>
<br />
<div>
    <label>Enter value: </label>
      {{input value=this.item}}
</div>
<input
    type="button"
      id="R-item"
      value="Remove this item"
      {{action "remove_item" this.item}}
/>
<br /><br />
<input
    type="button"
    id="list-items"
    value="List All Items"
    {{action "list"}} />
<br /><br />
<input
    type="button"
      id="increase-property"
      value="Increase Quantity"
      {{action "increase"}}
/>
<br /><br />
<input
    type="button"
      id="decrease-property"
      value="decrease Quantity"
      {{action "decrease"}}
/>
{{outlet}}


Output: Visit localhost:4200/get2 to view the output.

Ember.js ObjectProxy get() Method

Reference: https://api.emberjs.com/ember/4.4/classes/ObjectProxy/methods/get?anchor=get



Last Updated : 15 Nov, 2022
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