new_contents: #!/usr/bin/env python
  from django.db import models
  from django.utils.translation import ugettext_lazy as _
  
  from datetime import datetime
  
  
  
  class Date(models.Model):
  
      date_insert = models.DateTimeField(_(u"Date insert"), auto_now_add=True)
      date_update = models.DateTimeField(_(u"Date update"), auto_now=True)
  
      class Meta:
          abstract = True
  
      def save(self, *args, **kwargs):
          self.date_update = datetime.now()
          super(Publisher, self).save(*args, **kwargs)
  
subject: Create date models, control insert and update