old_contents: from django.contrib.syndication.views import Feed
  
  from .models import Post
  from .settings import (
      SYNDICATION_FEED_TITLE, SYNDICATION_FEED_LINK,
      SYNDICATION_FEED_DESCRIPTION, SYNDICATION_FEED_TYPE
  )
  
  
  class LatestPostFeed(Feed):
      title = SYNDICATION_FEED_TITLE
      link = SYNDICATION_FEED_LINK
      description = SYNDICATION_FEED_DESCRIPTION
      feed_type = SYNDICATION_FEED_TYPE
  
      def items(self):
          return Post.objects.recent()
  
      def item_title(self, item):
          return item.subject
  
      def item_description(self, item):
          return item.body
  
      def item_pubdate(self, item):
          return item.created_on
  
      def item_updateddate(self, item):
          return item.modified_on
  
      def item_categories(self, item):
          return [category.title for category in item.category.hierarchy()]
  
      def item_author_name(self, item):
          return "{first_name} {last_name}".format(
              first_name=item.author.first_name,
              last_name=item.author.last_name,
          )
  
      def item_author_email(self, item):
          return item.author.email
  
new_contents: from django.contrib.syndication.views import Feed
  
  from .models import Post
  from .settings import (
      SYNDICATION_FEED_TITLE, SYNDICATION_FEED_LINK,
      SYNDICATION_FEED_DESCRIPTION, SYNDICATION_FEED_TYPE
  )
  
  
  class LatestPostFeed(Feed):
      title = SYNDICATION_FEED_TITLE
      link = SYNDICATION_FEED_LINK
      description = SYNDICATION_FEED_DESCRIPTION
      feed_type = SYNDICATION_FEED_TYPE
      description_template = 'feed_post_description.html
  
      def items(self):
          return Post.objects.recent()
  
      def item_title(self, item):
          return item.subject
  
      def item_description(self, item):
          return item.body
  
      def item_pubdate(self, item):
          return item.created_on
  
      def item_updateddate(self, item):
          return item.modified_on
  
      def item_categories(self, item):
          return [category.title for category in item.category.hierarchy()]
  
      def item_author_name(self, item):
          return "{first_name} {last_name}".format(
              first_name=item.author.first_name,
              last_name=item.author.last_name,
          )
  
      def item_author_email(self, item):
          return item.author.email
  
subject: Update feeds.py