text: from django.contrib import admin
  from bambu_comments.models import Comment
  
  class CommentAdmin(admin.ModelAdmin):
      def mark_spam(self, request, queryset):
          queryset.update(spam = True, approved = False)
      mark_spam.short_description = 'Mark selected comments as spam'
      
      def mark_approved(self, request, queryset):
          queryset.update(spam = False, approved = True)
      mark_approved.short_description = 'Mark selected comments as approved'
      
      list_display = ('__unicode__', 'name', 'email', 'approved', 'spam')
      list_filter = ('approved', 'spam')
      exclude = ('spam', 'content_type', 'object_id')
      date_hierarchy = 'sent'
      readonly_fields = ('sent',)
      actions = (mark_spam, mark_approved)
      
      def changelist_view(self, request, extra_context = None):
          if not request.GET.has_key('spam__exact'):
              q = request.GET.copy()
              q['spam__exact'] = '0'
              request.GET = q
              request.META['QUERY_STRING'] = request.GET.urlencode()
          
          return super(CommentAdmin, self).changelist_view(request, extra_context)
  
  admin.site.register(Comment, CommentAdmin)