content: from django.core.management.base import BaseCommand
  
  from ipam.models import Prefix, VRF
  from ipam.utils import rebuild_prefixes
  
  
  class Command(BaseCommand):
      help = "Rebuild the prefix hierarchy (depth and children counts)"
  
      def handle(self, *model_names, **options):
          self.stdout.write(f'Rebuilding {Prefix.objects.count()} prefixes...')
  
          # Reset existing counts
          Prefix.objects.update(_depth=0, _children=0)
  
          # Rebuild the global table
          global_count = Prefix.objects.filter(vrf__isnull=True).count()
          self.stdout.write(f'Global: {global_count} prefixes...')
          rebuild_prefixes(None)
  
          # Rebuild each VRF
          for vrf in VRF.objects.all():
              vrf_count = Prefix.objects.filter(vrf=vrf).count()
              self.stdout.write(f'VRF {vrf}: {vrf_count} prefixes...')
              rebuild_prefixes(vrf.pk)
  
          self.stdout.write(self.style.SUCCESS('Finished.'))
  