gistfile1.py

# company/models.py
from django.conf          import settings
from django.db            import models
from diagnose.models      import IdentityModel
from users.models         import User

class Company(IdentityModel):
  name    = models.CharField(max_length=200)
  website = models.URLField()
  logo    = models.FileField()
  owner   = models.OneToOneField("users.User", related_name='company')

# disciplines/models.py
from django.db        import models
from diagnose.models  import BaseModel

class Discipline(BaseModel):
  company     = models.ForeignKey('company.Company', related_name='disciplines')
  name        = models.CharField(max_length=200)
  description = models.CharField(max_length=200)
  sort_order  = models.PositiveIntegerField(default=1)
  is_active   = models.BooleanField(default=True)


# BaseModel
class BaseModel(models.Model):
  logs        = generic.GenericRelation('logs.Log')
  updated_on  = models.DateTimeField(auto_now=True)
  created_on  = models.DateTimeField(auto_now_add=True)

  class Meta:
    abstract      = True
    get_latest_by = 'updated_on'


# View Code
d = Discipline.objects.get(id=int(discipline_id), company=company)
d.delete()