django models.py file for a sample prefilled database

models.py

from django.db import models

class Company(models.Model):
    name = models.CharField(max_length=255,unique=True)

class Department(models.Model):
    name = models.CharField(max_length=255)
    company = models.ForeignKey(Company)
    class Meta():
        unique_together = (('name','company'))
class Employee(models.Model):
    name = models.CharField(max_length=255)
    last_name = models.CharField(max_length=255)
    birthday = models.DateTimeField()
    department = models.ForeignKey(Department)
    

def fillDB():
    import datetime
    for i in range(10):
        print 'Company %d'%i
        company = Company(name="company%d"%i)
        company.save()
        for j in range(10+i%10):
            print 'department %d'%j
            department = Department(name='department%d'%j,company=company)
            department.save()
            for k in range(50+j):
                val = i+j+k
                employee = Employee(name='employee name %d'%k,
                                    last_name='employee lastname %d'%k,
                                    birthday=datetime.datetime(1900+(val%100),(val%12)+1,(val%28)+1),
                                    department=department)
                employee.save()