title: One vs Two Objects Of Related Information
body: <p>When having two related objects, is it best to have them as one object or two separate?  </p>
  
  <p>For example, if you have an Artist object and an array of Album objects that relate to a single Artist.</p>
  
  <pre><code>&lt;?php 
  // two separate objects?
  $artist = $ArtistDataMapper-&gt;find(1);
  $album = $AlbumDataMapper-&gt;allByArtist($artist-&gt;id);
  // or one
  $artist = $AristDataMapper-&gt;find(1);  //datamapper will also include query for albums
  </code></pre>