text: from django.db import models
  import uuid
  # Create your models here.
  
  
  class AbstractModel(models.Model):
      uuid = models.UUIDField(unique=True, default=uuid.uuid4)
      created_on = models.DateTimeField(auto_now_add=True)
      updated_on = models.DateTimeField(auto_now=True)
      server_created_on = models.DateTimeField(auto_now_add=True)
      server_updated_on = models.DateTimeField(auto_now=True)
      is_deleted = models.BooleanField(null=False, default=False)
  
      class Meta:
          abstract = True
  
  
  class Ticket(AbstractModel):
      heading = models.TextField()
  
  
  class Commit(AbstractModel):
      ticket = models.ForeignKey(Ticket, on_delete=models.CASCADE, related_name='commit_set')
      message = models.TextField()
  