old_contents: from datetime import datetime
  
  from django.db import models
  
  from mygpo.podcasts.models import Podcast
  
  
  class PodcastUpdateResult(models.Model):
      """ Results of a podcast update
  
      Once an instance is stored, the update is assumed to be finished. """
  
      # The podcast that was updated
      podcast = models.ForeignKey(Podcast, on_delete=models.CASCADE)
  
      # The timestamp at which the updated started to be executed
      start = models.DateTimeField(default=datetime.utcnow)
  
      # The duration of the update
      duration = models.DurationField()
  
      # A flad indicating whether the update was successful
      successful = models.BooleanField()
  
      # An error message. Should be empty if the update was successful
      error_message = models.TextField()
  
      # A flag indicating whether the update created the podcast
      podcast_created = models.BooleanField()
  
      # The number of episodes that were created by the update
      episodes_added = models.IntegerField()
  
      class Meta(object):
  
          get_latest_by = 'start'
  
          ordering = ['-start']
  
          indexes = [
              models.Index(fields=['podcast', 'start'])
          ]
  
  
new_contents: from datetime import datetime
  
  from django.db import models
  
  from mygpo.core.models import UUIDModel
  from mygpo.podcasts.models import Podcast
  
  
  class PodcastUpdateResult(UUIDModel):
      """ Results of a podcast update
  
      Once an instance is stored, the update is assumed to be finished. """
  
      # The podcast that was updated
      podcast = models.ForeignKey(Podcast, on_delete=models.CASCADE)
  
      # The timestamp at which the updated started to be executed
      start = models.DateTimeField(default=datetime.utcnow)
  
      # The duration of the update
      duration = models.DurationField()
  
      # A flad indicating whether the update was successful
      successful = models.BooleanField()
  
      # An error message. Should be empty if the update was successful
      error_message = models.TextField()
  
      # A flag indicating whether the update created the podcast
      podcast_created = models.BooleanField()
  
      # The number of episodes that were created by the update
      episodes_added = models.IntegerField()
  
      class Meta(object):
  
          get_latest_by = 'start'
  
          ordering = ['-start']
  
          indexes = [
              models.Index(fields=['podcast', 'start'])
          ]
  
  
subject: Use UUID as primary key of PodcastUpdateResult