 <p><code>attrgetter</code> can be used to pull out attributes of objects that you may want to key a sort by.</p> <pre><code>from operator import attrgetter results = [] results.extend(list(AudioItem.objects.filter(...))) results.extend(list(VideoItem.objects.filter(...))) results.extend(list(ImageItem.objects.filter(...)) results.sort(key=attrgetter("upload_date") </code></pre>