old_contents: from django.core.management import BaseCommand
  from podcasts.models import Podcast
  
  
  class Command(BaseCommand):
      help = 'Initialize podcasts with data from their RSS feeds'
  
      def handle(self, *args, **kwargs):
          for podcast in Podcast.objects.all():
              podcast.update()
  
new_contents: from django.core.management import BaseCommand
  from optparse import make_option
  from podcasts.models import Podcast
  
  
  class Command(BaseCommand):
      help = 'Initialize podcasts with data from their RSS feeds'
      option_list = BaseCommand.option_list + (
          make_option(
              '--only-new',
              action='store_true',
              dest='only_new',
              default=False,
              help='Only update new podcasts'
          ),
      )
  
      def handle(self, *args, **options):
          for podcast in Podcast.objects.all():
              if options['only_new'] and podcast.title != "":
                  continue
              podcast.update()
  
subject: Make it optional to only update metadata of new podcasts