title: Automatically Passing Certian values in BackBone Model Ajax Functions
body: <p>I am using Backbone js to create an app like service. Every application has a user_id and an application_id that has been set. Each time that backbone calls a fetch(), save(), or any other RESTful/ajax function, I want the user_id and the application_id to automatically be passed with the models data.</p>
  
  <p>I know I am going to have to extend the backbone model, and then make sure all my models extend from this model, but what do I modify and how do I call the parent model?</p>
  
  <p>Psuedo Example (not quite sure)</p>
  
  <pre><code>MyModel = Backbone.Model.extend({
      save : function(data) {
          data.application_id = 3;
          data.user_id = 5;
          parent.save(data);
  }
  });
  
  Scores = MyModel.extend({
        default : {
        score : 0
  }
  });
  
  //This should automatically grab the application id and user id
  scores = new Scores();
  scores.set('score', 5);
  score.save()
  </code></pre>
  
  <p>How do I correctly accomplish this? And by accomplish I mean an single point in the code that will work for save(), fetch() and destroy() ?</p>