text: from django.db import models
  
  # https://stackoverflow.com/questions/3429878/automatic-creation-date-for-django-model-form-objects
  class TimestampMixin(models.Model):
      created_at = models.DateTimeField(auto_now_add=True, db_index=True)
      updated_at = models.DateTimeField(auto_now=True, db_index=True)
  
      class Meta:
          abstract = True
  