title: Ember.js right way of records creation
body: <p>Cheers! I have models structure like this:</p>
  
  <pre><code>App.Foo = DS.Model.extend({
    bars: DS.hasMany('App.Bar')
  });
  
  App.Bar = DS.Model.extend({
    number: DS.attr('number'),
    foo: DS.belongsTo('App.Foo')
  });
  </code></pre>
  
  <p>Is it ok to create <code>App.Bar</code> record first? And if yes, then how to create <code>App.Foo</code> in future and associate already existing Bars records to it in right way? I just want to know, if there something like 'ember-way' in such situations?</p>