How to Call A From B in Ember

Some ideas to try before you go crazy

Ben Donaldson, Crowdly

Ember has many layers

Like an onionOr a sandwichOr a skyscraperOr your LiveJournal

Ember has many changes

How do I talk between layers?

Do those ways still work?

Is it the “Ember Way”?

How do I talk between layers?

Do those ways still work?

Is it the “Ember Way”?

I’ll list a bunch of ways that I found

Yes, at least for the last few weeks

Until it stops working

The List

The Listfree to use!*

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Unlike kangaroos and eucalyptus-eating possums, koalas are hindgut fermenters, and their digestive retention can last for up to 100 hours in the wild, or up to 200 hours in captivity. This is made possible by the extraordinary length of their caecum—200 cm (80 in) long and 10 cm (4 in) in diameter—the largest proportionally of any animal. Koalas can select which food particles to retain for longer fermentation and which to pass through. Large particles typically pass through more quickly, as they would take more time to digest. While the hindgut is proportionally larger in the koala than in other herbivores, only 10% of the animal's energy is obtained from fermentation. Since the koala gains a low amount of energy from its diet, its metabolic rate is half that of a typical mammal, although this can vary between seasons and sexes. The koala conserves water by passing relatively dry faecal pellets high in undigested fibre, and by storing water in the caecum.

The List

We’ll have two models, called Apple and Orange

Each has their own route, controller, view, and template

This is just for the simplest case

When I’m AppleRoute…Apple (the model)

this.modelFor(‘apple’)

OrangeRoute

this.get(‘router’).getHandler(‘orange’)

AppleController

this.controllerFor(‘apple’)

AppleView - no idea

Apple Template - no idea

When I’m AppleController…Apple (the model)

this.get(‘content’) (if it’s an Ember.ObjectController)

AppleRoute

this.get(‘target’) (if you’re currently on that route)

OrangeController

needs: [‘orange’] (in the root of AppleController)

this.get(‘controllers.orange’)

AppleView - no idea

Apple Template - no idea

When I’m AppleView…Apple (the model)

this.get(‘context’) (if AppleController is an Ember.ObjectController)

this.get(‘controller.content’) (if AppleController is an Ember.ObjectController)

AppleRoute

this.get(‘controller.target’) (if you’re currently on that route)

AppleController

this.get(‘controller’)

OrangeView - no idea

Apple Template

this.get(‘template’) (for the handlebars function, but you wouldn’t touch that much)

this.get(‘element’) (for the DOM element)

When I’m the Apple Template…Apple (the model)

this.get(‘view.context’) (if AppleController is an Ember.ObjectController)

this.get(‘controller.content’) (if AppleController is an Ember.ObjectController)

AppleRoute

this.get(‘controller.target’) (if you’re currently on that route)

AppleController

this.get(‘controller’)

AppleView

this.get(‘view’)

Orange Template - no idea

In case of emergency...Warning: these are not “elegant” or “the Ember Way” but could “let you meet a deadline”

Make an init function and make manual connections

AppleView = Em.View.extend({

init: function() {

this.get(‘controller’).set(‘yourAppleView’, this);

}

}

Ask the almighty ‘container’, available pretty much everywhere in your app.

this.get(‘container’).lookup(‘view:apple’)

THANK YOU

THESE SLIDES WILL BE ONLINE SOMEWHERE

THANK YOU

THESE SLIDES WILL BE ONLINE SOMEWHERE

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