old_contents: from django.conf import settings
  from django.utils.translation import ugettext_lazy as _
  from django.utils.translation import ungettext
  
  from lemon import extradmin
  from publications.admin import PublicationAdmin
  
  from .forms import PageAdminForm
  from .models import Page
  
  
  if 'metadata' in settings.INSTALLED_APPS:
      import metadata
      MetadataAdminMixin = metadata.MetadataAdminMixin
  else:
      class MetadataAdminMixin(object):
          pass
  
  
  class PageAdmin(MetadataAdminMixin, PublicationAdmin):
  
      form = PageAdminForm
      date_hierarchy = None
      search_fields = ['title', 'content']
      markup_fields = ('content',)
      fieldsets = (
          (None, {
              'fields': (
                  'url_path', 'title', 'content', 'template', 'language',
                  'sites',
              )
          }),
      ) + PublicationAdmin.fieldsets
      list_display = ('url_path', 'title', 'language')
      list_display_links = ('title',)
      list_filter = ('enabled', 'language', 'sites')
      string_overrides = {
          'add_title': _(u'Add page'),
          'change_title': _(u'Change page'),
          'changelist_title': _(u'Choose page to change'),
          'changelist_popup_title': _(u'Choose page'),
          'changelist_addlink_title': _(u'Add page'),
          'changelist_paginator_description': lambda n: \
              ungettext(u'%(count)d page', u'%(count)d pages', n)
      }
      tabs = True
  
  
  extradmin.site.register(Page, PageAdmin)
  
  if 'metadata' in settings.INSTALLED_APPS:
      metadata.site.register(Page,
          language_field_name='language',
          sites_field_name='sites'
      )
  
new_contents: from django.conf import settings
  from django.utils.translation import ugettext_lazy as _
  from django.utils.translation import ungettext
  
  from publications.admin import PublicationAdmin
  
  from .forms import PageAdminForm
  from .models import Page
  
  
  if 'lemon.extradmin' in settings.INSTALLED_APPS:
      from lemon import extradmin as admin
  else:
      from django.contrib import admin
  
  
  if 'metadata' in settings.INSTALLED_APPS:
      import metadata
      MetadataAdminMixin = metadata.MetadataAdminMixin
  else:
      class MetadataAdminMixin(object):
          pass
  
  
  class PageAdmin(MetadataAdminMixin, PublicationAdmin):
  
      form = PageAdminForm
      date_hierarchy = None
      search_fields = ['title', 'content']
      markup_fields = ('content',)
      fieldsets = (
          (None, {
              'fields': (
                  'url_path', 'title', 'content', 'template', 'language',
                  'sites',
              )
          }),
      ) + PublicationAdmin.fieldsets
      list_display = ('url_path', 'title', 'language')
      list_display_links = ('title',)
      list_filter = ('enabled', 'language', 'sites')
      string_overrides = {
          'add_title': _(u'Add page'),
          'change_title': _(u'Change page'),
          'changelist_title': _(u'Choose page to change'),
          'changelist_popup_title': _(u'Choose page'),
          'changelist_addlink_title': _(u'Add page'),
          'changelist_paginator_description': lambda n: \
              ungettext(u'%(count)d page', u'%(count)d pages', n)
      }
      tabs = True
  
  
  admin.site.register(Page, PageAdmin)
  
  if 'metadata' in settings.INSTALLED_APPS:
      metadata.site.register(Page,
          language_field_name='language',
          sites_field_name='sites'
      )
  
subject: Add support for Django admin