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POWhy does the Django Atom1Feed use atom:updated instead of atom:published?
 

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  1. POWhy does the Django Atom1Feed use atom:updated instead of atom:published?
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    <p>I made an Atom feed in Django using a class that looks something like this:</p> <pre><code>class AtomFeed(Feed): feed_type = feedgenerator.Atom1Feed # ... def item_pubdate(self, post): return datetime.datetime(post.date.year, post.date.month, post.date.day) </code></pre> <p>The resulting XML for an item:</p> <pre><code>&lt;entry&gt; &lt;title&gt;..&lt;/title&gt; &lt;link href="..." rel="alternate"&gt;&lt;/link&gt; &lt;updated&gt;2010-10-18T00:00:00+02:00&lt;/updated&gt; &lt;author&gt;&lt;name&gt;...&lt;/name&gt;&lt;/author&gt; &lt;id&gt;...&lt;/id&gt; &lt;summary type="html"&gt;...&lt;/summary&gt; &lt;/entry&gt; </code></pre> <p>The thing to note here is that the date goes in the <code>atom:updated</code> element, not the <code>atom:published</code> element.</p> <p>The <a href="http://tools.ietf.org/html/rfc4287#page-23" rel="nofollow">RFC</a> clearly suggests to me that this is not the intended usage:</p> <blockquote> <p>The "atom:updated" element is a Date construct indicating the most recent instant in time when an entry or feed was modified in a way the publisher considers significant. Therefore, not all modifications necessarily result in a changed atom:updated value.</p> </blockquote> <p>Whereas:</p> <blockquote> <p>The "atom:published" element is a Date construct indicating an instant in time associated with an event early in the life cycle of the entry.</p> </blockquote> <p>This is more than just a theoretical problem. Google Reader, for example, does not seem to use the <code>updated</code> element, and uses the date that it first saw the item appear. As a result, it does not order the items properly upon first import of the feed.</p> <p>The code in Django responsible for this:</p> <p><a href="http://code.djangoproject.com/browser/django/trunk/django/utils/feedgenerator.py#L331" rel="nofollow"><code>django/utils/feedgenerator.py:331</code></a></p> <pre><code>if item['pubdate'] is not None: handler.addQuickElement(u"updated", rfc3339_date(item['pubdate']).decode('utf-8')) </code></pre> <p>There appears to be no mention of the <code>published</code> element.</p> <p>Is this a bug in Django? Am I misunderstanding the Atom RFC? Am I missing something else?</p>
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    1. USDan Lowe
    1. USThomas
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    1. COI would say this is a definite bug in django. When I say "when I published it", I don't want my translator saying "last time I changed it". I see you've already [reported it](http://code.djangoproject.com/ticket/14656), so I guess time will tell.
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      1. USeternicode
    2. COIt doesn't seem like a "missing" feature. in Django 1.2 and 1.3 you can add attributes to the feed. If I remember well in 1.3 it is just necessary to add trough the method item_extra_kwargs of the Feed class. "return {'published': self.get_object().created }", this would work also to create podcast feeds and others kind of feeds with special items or attributes
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      1. POWhy does the Django Atom1Feed use atom:updated instead of atom:published?
      1. USMario César
    3. COThat's good news, but it doesn't address the fact that the `atom:updated` element is abused, and that the important `atom:published` element isn't used out-of-the-box at all.
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      1. USThomas
 

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