title: MongoDB/Mongoose: updating two different fields in Mongoose model
body: <p>Is it possible to do something like this:</p>
  
  <pre><code>var updateData = {
      "$set": {
         content: 'foo'
      },
      "$push":{
         versions: {
           some: 'bar'
         }
      }
  
  };
  
  Model.update({},updateData, {});
  </code></pre>
  
  <p>or do we need to do two or more separate updates?</p>