It's quite useful to let your visitors track the comments of your weblog entries with RSS feeds. While displaying all recent comments is quite simple, there is no way in the defaults Feed class to to dynamically filter feeds-items by a given object.
So, how do I display all comments for a specific blog post in a feed? Here is the solution I use in this weblog. I've created a slightly modified Feed class:
from django.contrib.syndication.feeds import Feed from django.contrib.comments.models import Comment class CommentFeed(Feed): def __init__(self, entry_obj, request, slug='comments') self.title = 'Comments for "%s"' % entry_obj.title self.link = entry_obj.get_absolute_url() self._entry_obj = entry_obj super(CommentFeed, self).__init__(slug, request) def items(self): return Comment.objects.for_model(self._entry_obj) \ .filter(is_public=True, is_removed=False) \ .order_by('-submit_date') def item_pubdate(self, item): return item.submit_date
You pass the model instance to the class as it's first argument which is later used to filter all comments for the given instance. The slug argument, here comments, is used to call the specific templates for the feed. So don't forget to create the feed templates feeds/comments_title.html and feeds/comments_description.html. The rest is as usual as described in the documentation.
Unfortunately you can't use the brought with feed view django.contrib.syndication.views.feed to serve the feed data as it does not take any extra arguments. But a unique view for serving your comment feed is simple:
from django.http import HttpResponse from weblog.models import Entry from weblog.feed import CommentFeed def details_feed(request, entry_slug): entry = Entry.objects.get(slug=entry_slug) feed = CommentFeed(entry, request).get_feed() response = HttpResponse(mimetype=feed.mime_type) feed.write(response, 'utf-8') return response
This view expects one argument, the slug for a model entry which instance i passed to the CommentFeed as described above. The rest of this function differs not much from the original feed view.