How to Work With Nested Routes In Ember.js?

In Ember.js, nested routes allow you to define a hierarchy of routes within your application. This can be useful for organizing your code and creating a more structured and modular application.

To work with nested routes in Ember.js, you first need to define your routes in the router.js file. You can define nested routes by using the this.route method inside the map function. For example, if you have a route called posts, and you want to add a nested route called comments under that route, you can define it like this:

1
2
3

this.route('posts', function() {
  this.route('comments');
});

You can then define corresponding templates for each route in the templates folder. In this case, you would create a posts.hbs template for the posts route and a comments.hbs template for the comments route.

To link to a nested route from within a template, you can use the {{#link-to}} helper, passing in the name of the nested route as an argument. For example, to link to the comments route from the posts template, you would use:

1
2
3

{{#link-to 'posts.comments'}}
  View Comments
{{/link-to}}

You can also access the params of the parent route in the child route by using the modelFor method inside the route file. This allows you to retrieve data from the parent route and use it in the child route.

Overall, working with nested routes in Ember.js can help you create a more organized and modular application structure, making it easier to manage and maintain your code.

What is the Ember.js router?

The Ember.js router is a powerful and flexible routing system that allows developers to define and manage navigational states in their Ember.js applications. It is a key component of the Ember.js framework, helping to manage the flow of user interaction and enabling developers to define and organize the structure of their application's routes, templates, and views. By mapping URL patterns to specific application states, the Ember.js router facilitates the creation of dynamic, single-page web applications with a clean and intuitive navigation flow.

What are nested route models in Ember.js?

Nested route models in Ember.js are models that are associated with a specific nested route within an application. These models are defined within the route file for the nested route and are responsible for fetching and managing data for that particular route. Nested route models allow for more granular control over data fetching and management within an Ember.js application, making it easier to organize and maintain complex data structures.

How to render nested routes in Ember.js templates?

In Ember.js, you can render nested routes in templates using the {{outlet}} helper. Here's how you can set up nested routes in your Ember.js application:

1. Define your routes in the router file (usually located at app/router.js). For example, if you have a parent route called 'posts' and a nested route called 'comments', you can define them like this:

1
2
3
4
5

// app/router.js

this.route('posts', function() {
  this.route('comments');
});

1. Create the corresponding templates for each route in the templates folder. For example, you would have a 'posts.hbs' template for the parent route and a 'comments.hbs' template for the nested route.
2. In the parent template (posts.hbs), use the {{outlet}} helper to render the nested route template (comments.hbs). For example:

1
2
3
4

<!-- app/templates/posts.hbs -->

<h1>Posts</h1>
{{outlet}}

1. Access the nested route by navigating to the parent route URL followed by the nested route path. For example, to access the 'comments' route, you would navigate to '/posts/comments'.

By following these steps, you can render nested routes in Ember.js templates using the {{outlet}} helper.

How to use queryParams in nested routes in Ember.js?

In Ember.js, queryParams allow you to add query parameters to the URL and update the route's model based on those parameters. When working with nested routes, you can use queryParams to filter or sort data within the nested route.

Here's an example of how you can use queryParams in nested routes in Ember.js:

1. Define the queryParams in the controller of the parent route:

1
2
3
4
5
6
7
8

// app/controllers/parent-route-controller.js

import Controller from '@ember/controller';

export default Controller.extend({
  queryParams: ['filter'],
  filter: null
});

1. Define the nested route with queryParams in the router file:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15

// app/routes/parent-route/child-route.js

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

export default Route.extend({
  queryParams: {
    sortBy: {
      refreshModel: true
    }
  },

  model(params) {
    // Your logic to filter or sort data based on the queryParams
  }
});

1. Update the child route template file to display the filtered or sorted data:

1
2
3
4
5

{{!-- app/templates/parent-route/child-route.hbs --}}

{{#each model as |item|}}
  <p>{{item.name}}</p>
{{/each}}

1. Update the parent route template file to include the queryParams:

1
2
3
4
5

{{!-- app/templates/parent-route.hbs --}}

{{input value=filter placeholder="Filter by name"}}

{{outlet}}

1. Update the parent route controller to handle the queryParams changes:

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14

// app/controllers/parent-route-controller.js

import Controller from '@ember/controller';

export default Controller.extend({
  queryParams: ['filter'],
  filter: null,

  actions: {
    applyFilter() {
      // Your logic to update the filter query parameter
    }
  }
});

With these steps, you can use queryParams in nested routes in Ember.js to filter or sort data based on the query parameters provided in the URL.