text: from django.contrib import admin
  from rango.models import Category,Page
  from rango.models import UserProfile
  
  # Register your models here.
  class CategoryAdmin(admin.ModelAdmin):
      prepopulated_field = {'slug':('name',)}
      
  admin.site.register(Category, CategoryAdmin)
  admin.site.register(Page)
  admin.site.register(UserProfile)