old_contents: from django.contrib import admin
  
  from feder.virus_scan.models import Request
  
  
  @admin.register(Request)
  class LetterAdmin(admin.ModelAdmin):
      list_display = (
          "content_type",
          "content_object",
          "field_name",
          "engine_name",
          "status",
          "created",
          "modified",
      )
      list_filter = ("engine_name", "status", "created")
  
      def get_queryset(self, *args, **kwargs):
          qs = super().get_queryset(*args, **kwargs)
          return qs.prefetch_related("content_object").select_related("content_type")
  
new_contents: from django.contrib import admin
  
  from feder.virus_scan.models import Request
  
  
  @admin.register(Request)
  class LetterAdmin(admin.ModelAdmin):
      list_display = (
          "content_type",
          "content_object",
          "field_name",
          "engine_name",
          "status",
          "created",
          "modified",
      )
      list_filter = ("engine_name", "status", "created", "modified")
  
      def get_queryset(self, *args, **kwargs):
          qs = super().get_queryset(*args, **kwargs)
          return qs.prefetch_related("content_object").select_related("content_type")
  
subject: Allow filter virus_scan by modified in admin