old_contents: from django.contrib import admin
  
  # Register your models here.
  
new_contents: from django.contrib import admin
  
  from .models import OfficialDocument
  
  class OfficialDocumentAdmin(admin.ModelAdmin):
      list_display = ('document_type', 'created', 'mapit_id', 'source_url')
      search_fields = ('mapit_id', 'source_url')
      list_filter = ('document_type',)
      ordering = ('-created',)
  
  admin.site.register(OfficialDocument, OfficialDocumentAdmin)
  
subject: Add the OfficialDocument model to the admin