How does Ember.js handle view and controller scoping in relation to application state?

Other Questions Notion
1

I’m working on an Ember.js app and I’m confused about how views and controllers relate to the application state. Here’s what I’m doing:

I have a main edit view and controller:

App.EditView = Ember.View.extend({
  templateName: 'edit-template'
});

App.EditController = Ember.ObjectController.extend({
  title: 'Edit Mode'
});

These are used when I go to the edit route:

App.editRoute = Ember.Route.extend({
  path: '/edit',
  setupController: function(controller, model) {
    this.controllerFor('application').set('mainOutlet', 'edit');
  }
});

Now, I want to add smaller views and controllers inside this edit state:

App.MiniView = App.MiniView.create({ 
  controller: App.miniController
}).append();

App.miniController = App.MiniController.create();

My questions are:

  1. How are these mini views/controllers connected to the main EditView and EditController?
  2. What’s their relationship with the editRoute?
  3. Do I need to set up any special dependencies?

I’m not sure if I’m doing this the right way or if there’s a better approach for managing these relationships in Ember. Any help would be great!

2

In Ember.js, view and controller scoping is handled through a hierarchical structure. The main EditView and EditController serve as parent containers for your mini views and controllers. They don’t need explicit connections; Ember’s dependency injection system manages relationships automatically.

Your editRoute sets up the main context, and nested components inherit from it. Instead of creating instances manually, consider using Ember’s component system:

{{#each item in model}}
  {{mini-component item=item}}
{{/each}}

This approach leverages Ember’s built-in mechanisms for maintaining state and relationships. It’s more idiomatic and easier to maintain as your application grows. Remember, Ember’s strength lies in its conventions, so adhering to them will generally lead to cleaner, more manageable code.

3

hey alexj, ember connects mini views/controllers by nesting within the main view. using component syntax like {{render ‘mini’}} can help maintain context. no extra dependencies are usually needed as ember manages state connections.

4

I’ve been working with Ember for a while now, and I can share some insights on how it handles view and controller scoping. In my experience, Ember’s dependency injection system takes care of most of the relationships automatically, which is quite convenient.

For your mini views and controllers, you don’t need to explicitly connect them to the main EditView and EditController. They’ll naturally inherit the context. I’ve found it’s better to use Ember’s component system instead of creating instances manually. It’s more in line with Ember’s philosophy and easier to maintain.

One approach I’ve used successfully is to define these mini elements as components:

App.MiniComponent = Ember.Component.extend({
  // component logic here
});

Then in your edit template, you can simply do:

{{mini-component}}

This way, Ember handles the scoping and state management for you. It’s been much cleaner and less error-prone in my projects. Hope this helps!