Computed property in controller based on route's model in EmberJS

I want to implement computed property in controller that changes when data in route's model changed.

Route:

import Ember from 'ember';

export default Ember.Route.extend({
    model() {
        return new Ember.RSVP.hash({
            ingredients: this.store.findAll('ingredient'),
            recipes: this.store.peekAll('recipe')
        });
    },

    setupController: function(controller, modelHash) {
        controller.setProperties(modelHash);
    }
});

Controller:

import Ember from 'ember';

export default Ember.Controller.extend({
    pageNumber: 0,
    pageSize: 16,

    pages: function() {
        var pages = [];
        if (this.model != null) {
            var content = this.model.recipes;
            while (content.length > 0) {
                pages.push(content.splice(0, this.get("pageSize")));
            }
        }
        return pages;
    }.property('model.recipes.@each', 'pageSize'), 

    recipesOnPage: function() {
        return this.get('pages')[this.get('pageNumber')];
    }.property('pages', 'pageNumber')
});

This code produce no error, but doesn't work - "pages" always empty. And "pages" property doesn't recomputed on model changing. What am I doing wrong? And how to achieve desired result?

P.S. Ember version - 1.13.