How to recursively query in django efficiently?

Question

I have a model, which looks like:

class StaffMember(models.Model):

    id = models.OneToOneField(to=User, unique=True, primary_key=True, related_name=\'staf         


        

Answer 1

If you're using a database that supports recursive common table expressions (e.g. PostgreSQL), this is precisely the use-case.

team = StaffMember.objects.raw('''
    WITH RECURSIVE team(id, supervisor) AS (
          SELECT id, supervisor 
          FROM staff_member
          WHERE id = 42
        UNION ALL
          SELECT sm.id, sm.supervisor
          FROM staff_member AS sm, team AS t
          WHERE sm.id = t.supervisor
        )
    SELECT * FROM team
''')

References: Raw SQL queries in Django
Recursive Common Table Expressions in PostgreSQL