EmberJS - Models

Model is a class that extends the functionality of the Ember Data. When a user refreshes the page, the contents of page should be represented by a model. In Ember.js, every route has an associated model. The model helps to improve the performance of application. The Ember Data manipulates the stored data in the server and also works easily with streaming APIs like socket.io and Firebase or WebSockets.

Core Concepts

• Store
• Models
• Records
• Adapter
• Caching

Store

The store is a central repository and cache of all records available in an application. The route and controllers can access the stored data of your application. The DS.Store is created automatically to share the data among the entire object.

import Ember from 'ember';

export default Ember.Route.extend ({
   model() {
      return this.store.find();
   }
});

Models

Model is a class that extends the functionality of the Ember Data, which specifies relationships with other objects. When a user refreshes the page, the contents of page should be represented by a model.

import DS from 'ember-data';

export default DS.Model.extend ({
   owner: DS.attr(),
   city: DS.attr()
});

Records

A record is an instance of a model that includes the information, which is loaded from a server and you can identify the record by its model type and ID.

//It finds the record of type 'person' and an 'ID' of 1
this.get('store').findRecord('person', 1); // => { id: 1, name: 'steve-buscemi' }

Adapter

An adapter is an object that is responsible for translating requested records from Ember into appropriate calls to particular server backend. For instance, if you want to find a person with ID of 1, then Ember will load the URL by using HTTP as /person/1.

Caching

The records can be cached automatically by the store and returns the same object instance when you load the records from the server for the second time. This improves the performance of your application and displays the application UI to the user as fast as possible.

The following table lists down the details about models −