sorting,ember.js,has-many,computed-properties , Emberjs advanced sort hasMany association as a computed property

Emberjs advanced sort hasMany association as a computed property


Tag: sorting,ember.js,has-many,computed-properties

I have asked a variant of this question here. But basically I need to create a computed property that operated on a hasMany association. I need to do sorting similar to the javascript sort function; where I can do something like

files = ["File 5", "File 1", "File 3", "File 2"];
  return parseInt(b.split(' ').pop()) - parseInt(a.split(' ').pop())


["File 5", "File 3", "File 2", "File 1"]

Here is my jsbin:,js,output

Any help would be greatly appreciated.

Note: My jsbin presently is not working correctly (for reasons other then this question). I have posted a question about that here. I just did not want to hold up an answer to this question.

Update 1

Thanks @engma. I implemented the instructions. As a matter of fact, I copied and pasted what was posted. This is the new jsbin.,js,output

I still do not get anything sorted, though. And even if it did, it still would not have sorted the way I would like it.

I need something like the following: (below are errors that I get when I try to implement this in my code, not from jsbin, since I can not get jsbin to work)

  sortedFiles: function(){
    return this.get('files').sort(function(a,b){
      return parseInt(b.split(' ').pop()) - parseInt(a.split(' ').pop());

When I do this I get the following error:

Uncaught TypeError: this.get(...).sort is not a function

So since this.get('files') returns a promise, I figured I would try this;

  sortedFiles: function(){
    return this.get('files').then(function(files){
      return files.sort(function(a,b){
        return parseInt(b.split(' ').pop()) - parseInt(a.split(' ').pop());

But then I get the following error:

Uncaught Error: Assertion Failed: The value that #each loops over must be an Array. You passed {_id: 243, _label: undefined, _state: undefined, _result: undefined, _subscribers: }

BTW, I am using emberjs v1.11.0

And, the sortBy I am using is ember-cli/node_modules/bower-config/node_modules/mout/array/sortBy.js

Here is the code for it

var sort = require('./sort');
var makeIterator = require('../function/makeIterator_');

     * Sort array by the result of the callback
    function sortBy(arr, callback, context){
        callback = makeIterator(callback, context);

        return sort(arr, function(a, b) {
            a = callback(a);
            b = callback(b);
            return (a < b) ? -1 : ((a > b) ? 1 : 0);

    module.exports = sortBy;

Update 2

So to answer the question how to do an Emberjs advanced sort hasMany association as a computed property; I had to change


  return this.get('files').toArray().sort(function(a,b){

This allowed me to use the javascript sort and return the desired sorted objects.


Ok first of all your JSBin had many issues so lets go throw them one by one

1- you did not include any Ember-Data build, so I included 1, this is needed for the fixtures and the models

<script src=""></script>

2- Your Scripts

var App = window.App = Ember.Application.create({
//First this is how to register the adapter
App.ApplicationAdapter = DS.FixtureAdapter.extend({});

App.IndexRoute = Ember.Route.extend({
  model: function() {
    //Second with find you pass in the ID so I am using 1
    //if you want to get all folders use findAll()

App.IndexController = Ember.Controller.extend({

}); {

App.Folder = DS.Model.extend({
  name: DS.attr('string'),
  files:  DS.hasMany('file',{async:true}),
  sortedFiles: function(){
    //Sorty By has no second parameter, if you need more sorting power, do it your self
    return this.get('files').sortBy('name');


App.File = DS.Model.extend({
  name: DS.attr('string'),
  folder: DS.belongsTo('folder',{async:true})

App.File.FIXTURES = [
    id: 1,
    name: 'File 5',
    id: 2,
    name: 'File 1',
    id: 3,
    name: 'File 3',
    id: 4,
    name: 'File 2',
    id: 5,
    name: 'File 6',
    id: 6,
    name: 'File 4',

App.Folder.FIXTURES = [
    id: 1,
    name: 'Folder 1',
    id: 2,
    name: 'Folder 2',

Your Template:

   Folders: <br>
     Name: {{}} <br>
     {{!-- here we access the sorted files property in the model--}}
     {{#each file in model.sortedFiles}}
       {{}} <br/>


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