@@ -0,0 +1,218 @@
+from django.db import models%0A%0A%0Aclass TimeStampMixin(models.Model):%0A    created_on = models.DateTimeField(auto_now_add=True)%0A    updated_on = models.DateTimeField(auto_now=True)%0A%0A    class Meta:%0A        abstract = True%0A

Add `TimeStampMixin`