code: def handle(self, *args, **options):
      yesterday = datetime.datetime.now - datetime.timedelta(days=1)
      items = Item.objects.filter(
          source_file__isnull=True, date_added__gte=yesterday
      )
      for item in items:
          item.save()
  
file_path: TimeSide/timeside/server/management/commands/timeside-get-source-and-task-run.py
imports: from optparse import make_option
  from django.conf import settings
  from django.core.management.base import BaseCommand, CommandError
  from django.contrib.auth.models import User
  from django.template.defaultfilters import slugify
  from timeside.server.models import Task, Item
  import datetime
label_desc: Use image node_id 1 for calling the Command obj's underlying member method code with example usage: obj.handle() without return types