http://stackoverflow.com/questions/39986939/ember-js-filtering-all-properties-of-a-model/39989609#39989609

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  filterText:'too',
  filterdText: Ember.computed('filterText',function(){
    var filter = this.get('filterText').toLowerCase();
    return this.get('model').filter((item,index) =>{ 
      for(var key in item){        
        if( item.hasOwnProperty(key)){
          console.log('OwnProperty Key-',key);
          if(item[key].toLowerCase().indexOf(filter) !== -1){
            return true
          }
        } else {
          console.log('Inherited Property Key-',key);
        }
      }
      return false;
    })    
  })
});

routes.application.js

import Ember from 'ember';

export default Ember.Route.extend({
  test: [
  {
    "source": "this is a source", 
    "title": "this is a title",
    "message":"this is a message"
  },
  {
    "source": "this is a source too", 
    "title": "this is a title too",
    "message":"this is a message took"
  }
],
  model(){
    return this.get('test');
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{input value=filterText }}
{{log 'filterdText ' filterdText}}
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.10.5",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.8.0",
    "ember-data": "2.8.0",
    "ember-template-compiler": "2.8.0",
    "ember-testing": "2.8.0"
  },
  "addons": {}
}