old_contents: from django.contrib import admin
  
  from models import Page
  
  
  class PageAdmin(admin.ModelAdmin):
      model = Page
      list_display = ('headline', 'parent', 'slug', 'public')
  
  admin.site.register(Page, PageAdmin)
  
new_contents: from django.contrib import admin
  
  from models import Page
  
  
  class PageAdmin(admin.ModelAdmin):
      model = Page
      list_display = ('headline', 'parent', 'get_full_slug', 'public')
  
  admin.site.register(Page, PageAdmin)
  
subject: replace slug display in admin with full slug