text: import uuid
  from django.db import models
  from .managers import SoftDeleteManager
  
  
  class TimeStampedModel(models.Model):
      created = models.DateTimeField(db_index=True, auto_now_add=True)
      modified = models.DateTimeField(auto_now=True)
  
      class Meta:
          abstract = True
  
  
  class Extensions(models.Model):
      """ Best practice for lookup field url instead pk or slug """
  
      uuid = models.UUIDField(db_index=True, default=uuid.uuid4, editable=False)
      created = models.DateTimeField(auto_now_add=True, db_index=True)
      modified = models.DateTimeField(auto_now=True)
  
      class Meta:
          abstract = True
  
  
  class UUIDModel(models.Model):
      """ 
      Best practice for lookup field url instead pk or slug.
      for security
      """
  
      uuid = models.UUIDField(db_index=True, default=uuid.uuid4, editable=False)
  
      class Meta:
          abstract = True
  
  
  class SoftDeleteModel(models.Model):
      is_deleted = models.BooleanField(default=False)
  
      objects = SoftDeleteManager()
  
      class Meta:
          abstract = True
  