old_contents: from __future__ import unicode_literals
  
  from django.contrib import admin
  
  
  class CategoryAdmin(admin.ModelAdmin):
      pass
  
new_contents: from __future__ import unicode_literals
  
  from django.contrib import admin
  
  
  class CategoryAdmin(admin.ModelAdmin):
      date_hierarchy = 'created'
      list_display = ['name', 'description']
      prepopulated_fields = {"slug": ("name",)}
      search_fields = ['name', 'description']
  
subject: Improve admin of the Category Model