title: Backbone polling server for changes - then re-render?
body: <p>I'm trying to use Backbone to pull daily events from a JSON API, and to periodically check for changes in the JSON - and to re-render those changes. Also - the app will be long running, so I'll have a periodic check for the date - so that when the date changes, so does the URL of the collection and the collection is re-fetched and re-rendered.</p>
  
  <p>However, when I re-fetch the data (whether it has been modified or is new data entirely) --- it isn't firing any change events on the model or collection.</p>
  
  <p>I could paste my code - but it may save time to just ask simply:</p>
  
  <p>What would the process be for polling the server for new/modified data, then  adding/removing/updating the models on the view? I don't need to do any <em>writing</em> to the server, just pulling the content - and polling ever 30 seconds for changes.</p>
  
  <p>Would that be a sync? fetch?</p>
  
  <p>I've searched the web for methods on this - but with continuous changes to the Backbone API - I haven't been able to find a viable solution thus far.</p>
  
  <p>Thanks for your help!</p>