title: Should I download the information in controller or data class?
body: <p>My application downloads photos from web server. Is downloading photo information from server Controller's business or data's business? I mean should I download data in controller class </p>
  
  <pre><code>Photo.title = [self getPhotoInfoFromServer: url]; 
  </code></pre>
  
  <p>or in data class? </p>
  
  <pre><code>[Photo getPhotoInfoFromServer: url];
  </code></pre>