Where to Keep Xhr Calls In Ember.js?

In Ember.js, XHR calls should typically be kept in the route's model hook or in a service. The model hook of a route is where you can fetch data from an API using XHR calls and set it as the model for that route, which will automatically be rendered in the template. Alternatively, you can create a service to handle all of your XHR calls. Services are reusable across different parts of your application and can provide a centralized place to manage and make XHR requests. By keeping XHR calls in the route's model hook or in a service, you can follow Ember's conventions and maintain a clean and organized structure for your application.

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Where should XHR calls be kept in Ember.js?

XHR (XMLHttpRequest) calls should be kept in the service layer in Ember.js. This follows the recommended architecture in Ember.js, where services are used to handle logic that is not specific to a route or controller. By keeping XHR calls in services, you can keep your code modular, reusable, and easy to test.

What is the best way to handle authentication in XHR calls in Ember.js?

In Ember.js, the best way to handle authentication in XHR calls is by using Ember Simple Auth addon. Ember Simple Auth provides a flexible and powerful way to manage authentication and authorization in Ember.js applications.

Here is a step-by-step guide on how to handle authentication in XHR calls using Ember Simple Auth:

1. Install Ember Simple Auth addon by running the following command in your Ember.js project:

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ember install ember-simple-auth

1. Configure Ember Simple Auth by creating an authenticator and authorizer. You can use the built-in OAuth2PasswordGrantAuthenticator and OAuth2BearerAuthorizer provided by Ember Simple Auth, or create your own custom authenticator and authorizer.
2. Set up the authentication process in your application by creating login and logout actions in your Ember controllers or components. These actions will use the authenticator to authenticate the user and manage the user session.
3. Use the ajax method provided by Ember Data or Ember.$.ajax to make XHR calls with authentication. Ember Simple Auth will automatically add the authentication token to the request headers, allowing the XHR call to be authenticated.
4. To handle authentication errors and redirect users to the login page when authentication fails, you can use the sessionInvalidated event provided by Ember Simple Auth.

By following these steps, you can effectively handle authentication in XHR calls in Ember.js using Ember Simple Auth. This approach provides a secure and reliable way to manage authentication and authorization in your Ember.js application.

What is the recommended data structure for storing XHR call responses in Ember.js?

In Ember.js, the recommended data structure for storing XHR call responses is the Ember Data model. Ember Data is a library for managing data models in Ember applications and provides a way to define models, relationships, and handle the persistence of data to a backend server.

By defining models in Ember Data, developers can easily retrieve, store, update, and delete data from the server. The data returned from XHR calls can be represented as instances of these models, making it easy to work with the data in a consistent and structured way throughout the application.

Ember Data also provides features like relationship management, computed properties, and data validations, making it a powerful tool for managing complex data structures in Ember applications. By using Ember Data models to store XHR call responses, developers can ensure a clean and organized data structure that is easy to work with and maintain.

How to handle pagination in XHR calls in Ember.js?

In Ember.js, handling pagination in XHR calls can be done by using the Ember Data library and its query parameters. Here are the steps to handle pagination in XHR calls in Ember.js:

1. Define a model for the resource you are fetching data for, say it's called 'post':

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// models/post.js

import DS from 'ember-data';

export default DS.Model.extend({
  title: DS.attr('string'),
  body: DS.attr('string')
});

1. Define a route for the resource where you want to implement pagination, say it's called 'posts':

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// routes/posts.js

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

export default Route.extend({
  model(params) {
    return this.store.query('post', { page: params.page, limit: params.limit });
  }
});

1. Add a controller for the route where you can define the pagination parameters:

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// controllers/posts.js

import Controller from '@ember/controller';

export default Controller.extend({
  queryParams: ['page', 'limit'],
  page: 1,
  limit: 10
});

1. Create a template to display the paginated data:

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{{#each model as |post|}}
  <div>{{post.title}}</div>
  <div>{{post.body}}</div>
{{/each}}

1. Update the template with navigation links to handle pagination:

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{{#link-to 'posts' (query-params page=1)}}First{{/link-to}}
{{#link-to 'posts' (query-params page=(dec model.meta.page))}}Previous{{/link-to}}
{{#link-to 'posts' (query-params page=(inc model.meta.page))}}Next{{/link-to}}
{{#link-to 'posts' (query-params page=model.meta.totalPages)}}Last{{/link-to}}

With these steps, you can now handle pagination in XHR calls in Ember.js using the Ember Data library and query parameters.