In Django, how do you make a model refer to itself?

Question

Assume we have class Employee. I want to have a field which references a different instance of the same class.

How to write this? How about the followi

Answer 1

A constraint forcing id and ref_employee_id to have separate values is outside the scope of Django's ORM. You will need to add said constraint at the database level, via SQL in syncdb or manually.