old_contents: from __future__ import unicode_literals
  
  from django.db import models
  from django.utils import timezone
  
  from taggit.managers import TaggableManager
  
  
  class Bookmark(models.Model):
      title = models.CharField(max_length=200, blank=True, null=True)
      description = models.TextField(blank=True, null=True)
      date_added = models.DateTimeField(default=timezone.now, blank=True)
      tags = TaggableManager(blank=True)
      private = models.BooleanField(default=False)
      url = models.URLField(max_length=500)
  
      def __unicode__(self):
          return "{}: {} [{}]".format(
              self.pk,
              self.title[:40],
              self.date_added
          )
  
new_contents: from __future__ import unicode_literals
  
  from django.db import models
  from django.utils import timezone
  from django.dispatch import receiver
  
  from taggit.managers import TaggableManager
  
  
  class Bookmark(models.Model):
      title = models.CharField(max_length=200, blank=True, null=True)
      description = models.TextField(blank=True, null=True)
      date_added = models.DateTimeField(default=timezone.now, blank=True)
      tags = TaggableManager(blank=True)
      private = models.BooleanField(default=False)
      url = models.URLField(max_length=500)
  
      def __unicode__(self):
          return "{}: {} [{}]".format(
              self.pk,
              self.title[:40],
              self.date_added
          )
  
  
  @receiver(models.signals.post_save, sender=Bookmark)
  def bookmark_pre_save_handler(sender, instance, created, *args, **kwargs):
      # Only run for new items, not updates
      if created:
          # TODO: Webhook
          return
  
subject: Add post_save signal handler