http://localhost/ticket/1217 <p> Exception raised doing this particular diff. </p> <p> <a class="ext-link" href="http://ckan.net/revision/diff/sudocfr?diff_entity=package&amp;oldid=a18b2520-09e0-44be-80dd-4fea94ffe7d1&amp;diff=3934ff16-a3a7-4481-b390-72944903b945"><span class="icon">​</span>http://ckan.net/revision/diff/sudocfr?diff_entity=package&amp;oldid=a18b2520-09e0-44be-80dd-4fea94ffe7d1&amp;diff=3934ff16-a3a7-4481-b390-72944903b945</a> </p> <pre class="wiki">... Module ckan.controllers.revision:142 in diff &lt;&lt; if c.diff_entity == 'package': c.pkg = model.Package.by_name(id) diff = c.pkg.diff(c.revision_to, c.revision_from) elif c.diff_entity == 'group': c.group = model.Group.by_name(id) &gt;&gt; diff = c.pkg.diff(c.revision_to, c.revision_from) Module ckan.model.package:449 in diff &lt;&lt; display_id = to_obj_rev.tag.name elif obj_class.__name__ == 'PackageExtra': display_id = to_obj_rev.key else: display_id = related_obj_id[:4] &gt;&gt; display_id = to_obj_rev.key AttributeError: 'NoneType' object has no attribute 'key' </pre><p> Seems to be to do with this particular extra key: </p> <pre class="wiki">[&lt;PackageExtraRevision id=ba1f3b3e-f61f-4924-bae0-ec3dd2163ae4 package_id=febe4da9-5874-4411-a7da-b497fdebf739 key=namespace value=http://www.sudoc.fr/ state=active revision_id=5ec8e730-c73d-4f1c-989b-2e015eb3d315 continuity_id=ba1f3b3e-f61f-4924-bae0-ec3dd2163ae4 expired_id=None revision_timestamp=2011-07-08 13:48:11.027260 expired_timestamp=9999-12-31 00:00:00 current=True&gt;] </pre><p> Is it because it was created between the from_revision and to_revision? </p> en-us http://assets.okfn.org/p/ckan/img/ckan_logo_shortname.png http://localhost/ticket/1217 Trac 0.12.3 dread Mon, 07 Nov 2011 10:54:37 GMT http://localhost/ticket/1217#comment:1 http://localhost/ticket/1217#comment:1 <ul> <li><strong>status</strong> changed from <em>new</em> to <em>closed</em> </li> <li><strong>resolution</strong> set to <em>invalid</em> </li> </ul> <p> I haven't seen this for a while - could have been due to database corruption which has been fixed. </p> Ticket