Inject a service into an Ember Object [not an Ember Controller]

Question

I'm trying to inject an Ember service into an Ember Object but keep getting the following error:

"Assertion Failed: Attempting to lookup an injected property on an
object without a container, ensure that the object was instantiated 
via a container."

My code looks essentially something like the following:

const Model = Ember.Object.extend({
  store: Ember.inject.service(),

  destroyRecord() {...},

  serialize() {...},

  deserialize() {...},
});

let newModel = Model.create();
newModel.get('store');

Note: it does work if I inject the service into a Controller, but not an object. Haven't had any luck trying to figure out how to register the Object with the Ember container.

Answer 1

It works for an Ember.Controller because Ember controls the lifecycle of the object. In short, when Ember needs an instance of a certain controller, it asks the container for one, and the container will provide the instance, initializing if necessary.

What this implies is that for dependency injection to work, you would need to get a new instance of Model through the container. Assuming Ember 2.3 because of getOwner, and that this is somewhere inside the Ember application:

let owner = Ember.getOwner(this);
let newModel = owner.lookup('object:model');
newmodel.get('store');

You can consult the lookup documentation here.

But how to register? Use an application initializer:

$ ember generate initializer register-model

Then, open up the generated initializer and, assuming that your file is in app/folder/model.js, put something like:

import Model from 'app-name/folder/model';

export function initialize(application) {
  application.register('object:model', Model);
}

export default {
  name: 'register-model',
  initialize
};

You can consult the register documentation here.

Hope this is helpful!