old_contents: # -*- coding: utf-8 -*-
  from six.moves import urllib_parse
  
  from django.contrib.syndication.views import Feed
  
  from wagtail.wagtailcore.models import Site
  
  from .models import BlogPage
  
  
  class BlogPageFeed(Feed):
  
      def __call__(self, request, *args, **kwargs):
          self.blog_page = BlogPage.objects.get(slug=kwargs['blog_slug'])
          self.request = request
          return super(BlogPageFeed, self).__call__(request, *args, **kwargs)
  
      def title(self):
          return self.blog_page.title
  
      def description(self):
          return self.blog_page.description
  
      def link(self):
          return self.blog_page.slug
  
      def items(self):
          return self.blog_page.get_entries()[:20]
  
      def item_title(self, item):
          return item.title
  
      def item_description(self, item):
          return item.body
  
      def item_pubdate(self, item):
          return item.date
  
      def item_enclosure_url(self, item):
          if item.header_image:
              site = Site.find_for_request(self.request)
              return urllib_parse.urljoin(site.root_url, item.header_image.file.url)
          return None
  
new_contents: # -*- coding: utf-8 -*-
  from six.moves import urllib_parse
  
  from django.contrib.syndication.views import Feed
  from django.core.urlresolvers import reverse
  
  from wagtail.wagtailcore.models import Site
  
  from .models import BlogPage
  
  
  class BlogPageFeed(Feed):
  
      def __call__(self, request, *args, **kwargs):
          self.blog_page = BlogPage.objects.get(slug=kwargs['blog_slug'])
          self.request = request
          return super(BlogPageFeed, self).__call__(request, *args, **kwargs)
  
      def title(self):
          return self.blog_page.title
  
      def description(self):
          return self.blog_page.description
  
      def link(self):
          return self.blog_page.slug
  
      def items(self):
          return self.blog_page.get_entries()[:20]
  
      def item_title(self, item):
          return item.title
  
      def item_description(self, item):
          return item.body
  
      def item_pubdate(self, item):
          return item.date
  
      def item_link(self, item):
          return reverse('entry_page_serve', kwargs={
              'blog_slug': self.blog_page.slug,
              'year': item.date.strftime('%Y'),
              'month': item.date.strftime('%m'),
              'day': item.date.strftime('%d'),
              'slug': item.slug
          })
  
      def item_enclosure_url(self, item):
          if item.header_image:
              site = Site.find_for_request(self.request)
              return urllib_parse.urljoin(site.root_url, item.header_image.file.url)
          return None
  
subject: Fix bug on feeds.py