old_contents: from django.contrib import admin
  from django.contrib.sites.models import Site
  from django.contrib.sites.requests import RequestSite
  from django.utils.translation import ugettext_lazy as _
  
  from registration.models import RegistrationProfile
  
  
  @admin.register(RegistrationProfile)
  class RegistrationAdmin(admin.ModelAdmin):
      actions = ['activate_users', 'resend_activation_email']
      list_display = ('user', 'activation_key_expired')
      raw_id_fields = ['user']
      search_fields = ('user__username', 'user__first_name', 'user__last_name')
  
      def activate_users(self, request, queryset):
          """
          Activate the selected users, if they are not alrady
          activated.
  
          """
          for profile in queryset:
              RegistrationProfile.objects.activate_user(profile.activation_key)
      activate_users.short_description = _("Activate users")
  
      def resend_activation_email(self, request, queryset):
          """
          Re-send activation emails for the selected users.
  
          Note that this will *only* send activation emails for users
          who are eligible to activate; emails will not be sent to users
          whose activation keys have expired or who have already
          activated.
  
          """
          if Site._meta.installed:
              site = Site.objects.get_current()
          else:
              site = RequestSite(request)
  
          for profile in queryset:
              if not profile.activation_key_expired():
                  profile.send_activation_email(site)
      resend_activation_email.short_description = _("Re-send activation emails")
  
new_contents: """
  Admin class for the RegistrationProfile model, providing several
  conveniences.
  
  This is only enabled if 'registration' is in your INSTALLED_APPS
  setting, which should only occur if you are using the model-based
  activation backend.
  
  """
  
  from django.contrib import admin
  from django.contrib.sites.shortcuts import get_current_site
  from django.utils.translation import ugettext_lazy as _
  
  from registration.models import RegistrationProfile
  
  
  @admin.register(RegistrationProfile)
  class RegistrationAdmin(admin.ModelAdmin):
      actions = ['activate_users', 'resend_activation_email']
      list_display = ('user', 'activation_key_expired')
      raw_id_fields = ['user']
      search_fields = ('user__username', 'user__first_name', 'user__last_name')
  
      def activate_users(self, request, queryset):
          """
          Activate the selected users, if they are not alrady
          activated.
  
          """
          for profile in queryset:
              RegistrationProfile.objects.activate_user(profile.activation_key)
      activate_users.short_description = _("Activate users")
  
      def resend_activation_email(self, request, queryset):
          """
          Re-send activation emails for the selected users.
  
          Note that this will *only* send activation emails for users
          who are eligible to activate; emails will not be sent to users
          whose activation keys have expired or who have already
          activated.
  
          """
          for profile in queryset:
              if not profile.activation_key_expired():
                  profile.send_activation_email(
                      get_current_site(request)
                  )
      resend_activation_email.short_description = _("Re-send activation emails")
  
subject: Clean up admin.py.